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vox_mundi

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Re: Floods
« Reply #1050 on: August 29, 2024, 08:09:38 PM »
New Model to Enhance Extreme Rainfall Prediction
https://phys.org/news/2024-08-extreme-rainfall.html



New research by an international team of climate experts shows intense, localized, heavy bursts of rainfall can be caused by a rapid rise of air through clouds and proves that these rises in air can be forecast. The team has developed a unique, cutting-edge modeling system marking a fundamental change in how we identify and forecast life-threatening, short-duration, extreme rainfall. Better prediction of these intense downpours will help provide crucial time for communities to prepare for extreme weather which can lead to devastating flash floods such as was seen in Boscastle in August 2004 or London in August 2022.

"The new model is aimed at enhancing the UK's resilience to extreme weather events, which are becoming more frequent and intense due to climate change. This approach addresses the urgent need for improved prediction capabilities and will help both UK and global communities in mitigating the risks associated with increasingly extreme weather events."

In order to understand these extreme rainfall events we have made an exciting discovery: the presence of a three-layered atmospheric structure, consisting of Moist Absolute Unstable Layers sandwiched between a stable upper layer and a near-stable low layer."

The new research focuses on the atmospheric properties of the extreme rainfall environment, with a particular focus on the thermodynamics associated with sub-hourly rainfall production processes. It identifies a distinctive three-layered atmospheric structure crucial to understanding localized downpours and associated large-scale atmospheric regimes which might enable further-ahead prediction of the occurrence of extreme downpours and flash flooding.

With human-induced climate change leading to more extreme weather conditions, the need for accurate early warning systems is more critical now than ever before."

Paul A. Davies et al, A new conceptual model for understanding and predicting life-threatening rainfall extremes, Weather and Climate Extremes (2024)
https://www.sciencedirect.com/science/article/pii/S2212094724000574?via%3Dihub
There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

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vox_mundi

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Re: Floods
« Reply #1051 on: August 31, 2024, 04:05:37 PM »
Yemen Floods Kill Nearly 100 and Damage Scores of Homes
https://www.dw.com/en/yemen-floods-kill-nearly-100-and-damage-scores-of-homes/a-70098987

Scores of people have died after three dam bursts following heavy rains and flooding in Yemen, according to a United Nations body. Yemenis have already been suffering from a ruinous civil war that began in 2014.

-----------------------------------------------------------

Greece Declares State of Emergency Over Flood of Dead Fish
https://www.dw.com/en/greece-declares-state-of-emergency-over-flood-of-dead-fish/a-70099461

The port city of Volos took the measure after tons of dead fish piled up on the coast and in rivers in recent days.

Authorities said the freshwater fish died as a result of devastating floods that hit Greece's central Thessaly region last year.

The floods refilled a nearby lake that had been drained in 1962 a bid to fight malaria, swelling it to three times its normal size.

The lake waters have since receded drastically, forcing the fish toward the Volos port that empties into the Pagasetic Gulf and the Aegean Sea.

But they cannot survive the salty sea waters and thousands of them have clogged the waters around the port.

On Tuesday alone, authorities removed 57 tons of the dead fish washed up on beaches near Volos.

-----------------------------------------------------------
There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

Fiat iustitia, et pereat mundus

kassy

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Re: Floods
« Reply #1052 on: September 03, 2024, 05:35:06 PM »
Japan under flood alert after days of record rainfall even as storm Shanshan weakens

...

Atami city in central Japan’s Shizuoka prefecture experienced record rainfall of over 654mm in 72 hours, more than three times the average for the entire month of August. Heavy rainfall led to landslides and swollen rivers, putting many areas at risk.

Authorities issued landslide warnings for the Hamamatsu, Izu and Yokohama regions as well as parts of Tokyo, urging people to evacuate to local stadiums and community centres for safety.

...

https://www.independent.co.uk/asia/japan/japan-storm-shanshan-latest-b2605441.html
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kassy

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Re: Floods
« Reply #1053 on: September 04, 2024, 10:42:52 PM »
More then 60 mm in Rome in an hour which is normally month worth of rain.

Also 90 mm in Majorca.

Lots more rain expected in Italy France and Switzerland. Turin and Milan might get over 100 mm.

https://www.nu.nl/buitenland/6327039/extreme-regenval-en-onweer-verwacht-in-meerdere-delen-van-europa.html
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kassy

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Re: Floods
« Reply #1054 on: September 09, 2024, 07:18:12 PM »
Eleven deaths and more people missing in floods in Morocco. The amount of rain in two days was equal to the normal yearly value for the regions (Tata and Errachidia).

https://www.nu.nl/buitenland/6327516/doden-en-vermisten-door-overstromingen-na-zware-regenval-in-zuiden-marokko.html

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kassy

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Re: Floods
« Reply #1055 on: September 10, 2024, 07:44:01 PM »
Heavy rains trigger flooding in Myanmar border town

Days of rain have lashed the Myanmar town of Tachileik and triggered flooding that has knocked out power and telephone lines, a resident and local media said on Tuesday, with more rain forecast.

...

Just over the border in the northern Thai district of Mae Sai, floodwaters were running through the streets, according to images published by local Thai media.

Thailand's weather office said more heavy to very heavy rains were likely in the north on Wednesday.

https://phys.org/news/2024-09-heavy-trigger-myanmar-border-town.html
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vox_mundi

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Re: Floods
« Reply #1056 on: September 10, 2024, 11:56:57 PM »
Floods hit millions in West and Central Africa
https://phys.org/news/2024-09-millions-west-central-africa.html

Chad: 1.5 million victims

Weeks of torrential rains in Chad have left 341 people dead and some 1.5 million affected since July, the UN's Office for the Coordination of Humanitarian Affairs (OCHA) said in early September.

The flooding has hit all of the country's 23 provinces, it said.

It cited government data which said some 164,000 houses had been destroyed, 66,700 heads of cattle lost, with 259,000 hectares (640,000 acres) of fields ruined.

Niger: nearly 650,000 displaced

In Niger, heavy rains since June have killed 273 and affected more than 700,000, authorities said early this month.

The flooding has devastated infrastructure, destroyed nearly 50,000 houses and disrupted the education of more than 39,000 children, according to the UNHCR.

The disruption has particularly hit southern regions where a large number of refugees have sought shelter.

Nigeria: 225,000 displaced

Neighboring Nigeria has seen 29 of its 36 states—mostly in the north—hit by rising waters in the River Niger and its major Benue tributary since mid-July.

More than 600,000 people have been affected, the UNHCR says.

At least 200 people have been killed and more than 225,000 displaced, many of whom were already uprooted by conflicts and climate change.

The Nigerian government says over 115,265 hectares of farmland have also been damaged, and one child in six had faced hunger between June and August, an increase of 25 percent compared to the same period last year.

South Sudan, Sudan: 1.2 million uprooted

Meanwhile, in the east, in Sudan and South Sudan, floods have left dozens dead and uprooted 1.2 million people, according to the UN's humanitarian agencies.

South Sudan, one of the poorest countries in the world, has lived through its most serious floods for decades.

The UN's humanitarian agency, OCHA, said that as of September 5 "flooding has affected more than 710,000 people across 30 of 78 counties".

"Floods have caused extensive damage to homes, crops and critical infrastructure, disrupting education and health services and increasing the risk of disease outbreaks," it said.

OCHA says that more than 490,000 people are affected by rain and flooding, especially in the north and east of the country.

At least 132 people have died, according to the health ministry on August 26.

The UNHCR on September 6 said that more than 35,000 houses had been destroyed and nearly 45,000 damaged. Thousands of children were threatened by a cholera epidemic caused by the floods and the stagnation of flood waters.
There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

Fiat iustitia, et pereat mundus

Alexander555

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Re: Floods
« Reply #1057 on: September 13, 2024, 09:16:57 PM »
If this prediction holds it's not looking good for Japan.

kassy

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Re: Floods
« Reply #1058 on: September 14, 2024, 09:24:19 AM »
Myanmar hit by deadly floods after Typhoon Yagi

Severe flooding has hit Myanmar after Typhoon Yagi, with more than 230,000 people forced to flee their homes, according to officials.
The country's ruling junta has requested foreign aid to mitigate the impact, the state-run media report. The capital Naypyidaw is among the areas worst hit.
The floods have killed at least 33 people, the country's military says. State-run daily New Light of Myanmar says some temporary relief camps have been set up for victims made homeless.
Asia's most powerful storm this year, Typhoon Yagi, has already swept Vietnam, the Chinese island of Hainan and the Philippines.

...

https://www.bbc.com/news/articles/ckgn1yrkyppo
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Stephan

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Re: Floods
« Reply #1059 on: September 14, 2024, 07:03:31 PM »
Flooding and intense rainfall in Central/South Eastern Europe.

A low, filled with warm moist air, formed two days ago after cold air from NW replaced warm air over Central Europe.This low slowly moves eastward, now it is centered above Hungary. On its W and N side warmer air full of moisture moves over denser colder air. In addition, some mountain ridges increase rainfall intensity. Most affected are Czech Republic, Austria, the southern part of Poland, but also Romania, where 4 casualties were reported so far, Slovakia, Moldova, and the SE parts of Germany. More rain is to be expected through Sunday into Monday morning.
The sum of rain is immense and comes close to "century events". It is also widespread which will lead to major floods in rivers like Donau, Elbe, Odra and others in the next week. At the moment mostly the smaller rivers and creeks have high water levels. Especially in the NE part of Czech Republic villages had to be evacuated.
Luckily for Austria most of the precipitation comes down as snow (above ca. 1,000 m a.s.l., extremely early snow this year). This will hold back some of the water masses for some days and will stretch the flood wave into length, whilst lowering the water maximum due to this delay.

The rain sums of Czech Republic for the last 48 hours is depicted in the attached picture. Please note how widespread rain sums > 100 l/m² are. 60,000 households had been without power in Czech Republic...

Update six hours later, see second picture. More than 270 l/m² at Šerák mountain.

Second update, now with the rain sums of the last 72 h. Note that not all weather stations have submitted data.

Third update, now with the rain sums of the last 72 hours, measured this morning. Thad showed the highest readings as the rain stopped this morning in that area. Incredible 439 l/m² at Šerák mountain (circled in red). This is worth a three month's precipitation in just three days. In Czech Republic the Opava river (usually a small peaceful one) in Opava city had 1,100 m³/s at the second last "century flood" in 1997. Today 1,600 m³/s flushed through this river and all the streets nearby. Therefore this flooding is now called a "millenial flooding".
« Last Edit: September 15, 2024, 08:31:26 PM by Stephan »
It is too late just to be concerned about Climate Change

Richard Rathbone

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Re: Floods
« Reply #1060 on: September 15, 2024, 11:36:30 AM »
https://www.bbc.co.uk/news/articles/c0jwp3ppp6xo

Quote
Storm Boris has already brought extreme amounts of rain across central and eastern Europe, with more torrential downpours in the forecast through until at least the end of Monday.

Some of the highest rainfall totals so far have been in the Czech Republic. At Lysa Hora in the mountains in the west of the country, 288mm of rain has fallen since Thursday. This is around three months’ worth of rain in just three days.

The storm has been so devastating for two reasons.

Firstly, the positioning of the storm has been drawing in colder air from the north to mix with moisture drawn up from the unusually warm waters of the Mediterranean and the Black Sea.

Secondly - the low pressure has been very slow moving over the same areas. It’s been stuck in a ‘blocked weather pattern’, meaning the storm is cut-off and trapped between high pressure to the west and the east.

Stephan

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Re: Floods
« Reply #1061 on: September 15, 2024, 07:46:31 PM »
This is a one in a century event, what's going on in Austria, Czech Republic and SW Poland.
The rain summed up to 360 mm/m² in northern parts of Austria.

The whole story can be followed on
https://www.wetteronline.de/wetterticker/live-ticker-zur-brisanten-wetter-hochwasser-und-dauerregen-in-europa--dd626641-1adf-442a-b92e-a496226806e4
(in German, but pictures say everything)

I will update the rain sums in my previous post this evening.

It is a catastrophy,
following two century floodings in 1997 and 2002, that originated in a very comparable weather situation. But this year the precipitation is even worse.
It is too late just to be concerned about Climate Change

Freegrass

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Re: Floods
« Reply #1062 on: September 16, 2024, 07:33:44 AM »
This is bad.

Keep 'em stupid, and they'll die for you.

morganism

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Re: Floods
« Reply #1063 on: September 16, 2024, 09:09:48 PM »

Scott Duncan
@ScottDuncanWX

Flooding disaster unfolding right now in Central Europe.

Why is it so bad?

This thread takes a quick look at some of the key ingredients of this record-breaking storm.

https://nitter.poast.org/ScottDuncanWX/status/1835397563396096240#m
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Richard Rathbone

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Re: Floods
« Reply #1064 on: September 18, 2024, 11:02:18 PM »
https://yaleclimateconnections.org/2024/09/epic-floods-are-wreaking-havoc-from-africa-to-asia-to-europe/

Floods in America from PTC8, Europe from Boris, Asia from Yagi, and West Africa.


Quote
Drawing on a record global supply of atmospheric moisture – and with a jet stream “stuck” in a mode identified in climate change research – a series of catastrophic floods has been slamming far-flung parts of the Northern Hemisphere in September.

Flooding from persistent, unusually heavy rains across northwest and north-central Africa has taken more than 1,000 lives and driven close to 1 million from their homes.
Storm Boris, a stalled upper low, has triggered days of intense rainfall, caused billions in damage, and forced tens of thousands to evacuate flooded cities across Central Europe.
Typhoon Yagi, which struck the Philippines and northern Vietnam and then hauled moisture across the highlands of Southeast Asia, spawned floods and mudslides that have taken more than 500 lives and cost over $13 billion.

Quote
One link among all of these systems: Warmer global temperatures allow more water to evaporate from oceans and intensify rainfall,

Quote
Jet-stream weirdness is another factor in play in the Northern Hemisphere. The usual belt of tropical rainfall has been displaced much farther north than usual in Africa, which has moistened parts of the arid Sahara Desert and brought torrents of rain to the semiarid Sahel belt (and perhaps also helped suppress hurricanes across the Main Development Region of the Atlantic).

kassy

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Re: Floods
« Reply #1065 on: September 21, 2024, 09:13:20 PM »
One dead and several missing after 'unprecedented' rains in Japan

...

More than 120mm (4.7in) of rain was recorded in Wajima on Saturday morning, NHK reported, the heaviest downpour in the region since records began.
JMA forecaster Sugimoto Satoshi told reporters: "This level of downpours has never been experienced in this region before. Residents must secure their safety immediately. The risk to their lives is imminent."

...

https://www.bbc.com/news/articles/c20pkwd4dg2o

and

Floods force Niger to delay new school year

Schools in Niger will start the new academic year almost a month late because of heavy rainfall and flooding, says the military government.
“Several schools have been affected, and others are being occupied by those impacted,” a government spokesperson said on the state-run broadcaster.
Authorities have pushed the start date from 2 to 28 October.
Over the last few weeks, the West African country has been battered by relentless downpours, resulting in over 300 deaths either due to drowning or buildings collapsing, according to the interior ministry.
In the central-southern city of Maradi, one of the worst hit areas, around 100 tents have been erected to accommodate people in schools.
The International Rescue Committee reported that over 800,000 people have been affected by the floods.
The organisation says countries like Niger, Mali, and Nigeria are dealing with some of the "worst floods in 30 years".

...

https://www.bbc.com/news/articles/c20j34ldzlxo
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kassy

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Re: Floods
« Reply #1066 on: September 23, 2024, 09:31:27 PM »
The cities of Wajima and Suzu, which are still recovering from a deadly earthquake that devastated the area on 1 January, are among the hardest hit by the deluge, which began on Saturday and continued until noon local time (03:00 GMT) on Monday.
On Sunday, both cities saw twice the amount of rainfall they typically receive in September in an average year, local media reported.

https://www.bbc.com/news/articles/c1jdpzj3gjlo
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kassy

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Re: Floods
« Reply #1067 on: September 24, 2024, 05:29:28 PM »
Flash floods and heavy rain batter England and Wales

Heavy rain and flash flooding have battered parts of England and Wales, causing widespread travel disruption and damage to properties.
Roads and houses flooded in central and southern England after some experienced a month's worth of rain in a matter of hours.
In London, a sinkhole appeared on AFC Wimbledon's football pitch and 999 call handlers took 350 flood-related calls, while in Bedford a main road was totally submerged.

...

https://www.bbc.com/news/articles/cn4zy0mp8ldo
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kassy

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Re: Floods
« Reply #1068 on: September 28, 2024, 08:25:23 PM »
At least 66 dead and dozens missing in Nepal floods

At least 66 people have died and 69 others are missing, officials say, after intense rainfall in Nepal caused flooding and landslides.

The death toll in the central Asian nation is likely to rise as the rains - which have predominantly affected the valley surrounding the capital, Kathmandu - are expected to persist through to Tuesday.

Thousands of homes situated near rivers have been flooded and most highways have been blocked, while video footage has emerged of people stranded on rooftops.

The volume of rainfall within a short timespan - over 200mm (7.9in) since Friday evening - has inundated almost all rivers in the Kathmandu valley, where many of the deaths have occurred.

...

https://www.bbc.com/news/articles/c0qz82e7d1jo
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vox_mundi

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Re: Floods
« Reply #1069 on: September 28, 2024, 10:12:11 PM »
https://www.cnn.com/2024/09/28/us/north-carolina-trapped-helene-flooding/index.html

Helene “is one of the worst storms in modern history for parts of North Carolina,” Gov. Roy Cooper said. More than 2 feet (>24 in) of rain fell in the state’s mountainous region from Wednesday morning to Friday morning, with Busick, a small unincorporated area in Yancey County, along the western border with Tennessee, recording 29.58 inches (750 mm) in just 48 hours.

https://www.npr.org/live-updates/helene-florida-georgia-south-carolina-path#29-inches-why-helenes-rainfall-and-flooding-is-so-bad

More than 400 roads remain closed in western North Carolina, the state Department of Transportation said Saturday morning. “All roads in Western NC should be considered closed,” the post on X says.

https://x.com/NCDOT/status/1840009840376131843

In North Carolina, Helene produced unusually heavy winds — up to 140 mph — on land, the strongest observed in coastal North Carolina since the start of modern meteorological recordkeeping in the 19th century.

Heavy rains from Helene set a record in Atlanta, which received its highest 48-hour rainfall on record over the past two days. The Georgia Climate Office tweeted on Friday that the area has already seen 11.12 inches of rain, beating a previous record of 9.59 set in 1886. Recordkeeping started in 1878.

--------------

Moody's Analytics said Friday it expects $15 billion to $26 billion in property damage from the hurricane

At least 52 people were killed in five states, including Florida, Georgia, North Carolina, South Carolina and Virginia, the Associated Press reported

https://apnews.com/article/hurricane-helene-florida-georgia-north-carolina-south-carolina-92d5caaafe40644e1db687cf6431395f

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Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

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kassy

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Re: Floods
« Reply #1070 on: October 14, 2024, 12:31:13 PM »
Eight dead as violent storms sweep Brazil after worst-ever drought

At least eight people have died and thousands are stranded without power after violent storms swept across Brazil on Friday.

Central and south-eastern parts of the country have been hit by winds of up to 100km/h (60mph) and daily rainfall reaching up to 10cm (4in), according to the National Institute of Meteorology.

Seven people are known to have died in São Paulo, Brazil's most populated state, mainly due to falling trees and infrastructure from the strong winds and heavy rainfall.

Residents in the south-eastern state described the unexpected downpour as brief but really intense.

...

The rain was so intense local media reported that officials inside the Chamber of Deputies - the lower house of Brazil's congress - were forced to use umbrellas inside as water leaked through the roof.

However, many people in Brasilia have welcomed the storm as long-awaited relief following a record of more than 165 days without rain.

...

https://www.bbc.com/news/articles/czj98v31jjdo
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kiwichick16

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Re: Floods
« Reply #1071 on: October 14, 2024, 09:58:17 PM »
drought to dry up the topsoil and weaken / kill off plant life  ......followed by flooding to wash away topsoil and plants


wash and repeat

kassy

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Re: Floods
« Reply #1072 on: October 17, 2024, 10:04:58 PM »
Heavy rainfall in France with some places getting up to 500 mm of rain.
Departments  effected  are Ardèche, Loire, Haute-Loire, Rhône, Lozère and Zee-Alpen.

Italy has had 200 mm of rain  in a different storm.

https://www.nu.nl/buitenland/6332062/ondergelopen-straten-en-code-rood-in-delen-van-frankrijk-door-zware-regenval.html

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Stephan

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Re: Floods
« Reply #1073 on: October 21, 2024, 09:13:26 PM »
Heavy floodings in central Italy (Emilia Romagna) caused at least one death toll. Many cities inundated, a dam broke close to the city of Bagnolo.
Trees fell down, cars floated through the villages.
Some pictures here: https://www.msn.com/de-de/wetter/topgeschichten/unwetter-und-%C3%BCberschwemmungen-in-italien-bologna-besonders-schwer-betroffen/vi-AA1sDwDI?ocid=msedgntp&pc=ACTS&cvid=db24f81d3d82458786961beaf93578eb&ei=16
It is too late just to be concerned about Climate Change

Espen

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Re: Floods
« Reply #1074 on: October 21, 2024, 09:23:06 PM »
Edit: Song videos can go into the music thread but are off topic here.
« Last Edit: October 21, 2024, 09:51:29 PM by kassy »
Have a ice day!

kassy

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Re: Floods
« Reply #1075 on: October 21, 2024, 09:53:11 PM »
A million people hit by flooding in South Sudan

Over a million people in South Sudan have been affected by floods across much of the country, the UN’s humanitarian organisation, Ocha, has said.

More than a quarter of those – many in the north – have been forced from their homes by rising waters.

Ocha said the displaced were seeking refuge on higher ground, but the rains have also meant that getting aid to those who need it had become increasingly difficult.

This is one of the worst flood seasons that South Sudan – a country with a population of more than 11 million people - has experienced in recent decades.

In Pibor, in the east, 112,000 people have lost their homes, according to a government relief agency there.

Those who have fled to higher ground “don’t even have food, they left everything in that previous location”, Joseph Nyao, director of Relief and Rehabilitation told the BBC from Pibor.

...

https://www.bbc.com/news/articles/cgey3e7yrvxo
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kassy

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Re: Floods
« Reply #1076 on: October 30, 2024, 09:09:21 AM »
Extreme rain and floods in Valencia and Malaga in Spain. 200 mms of rain over 12 hours.

https://www.nu.nl/buitenland/6333537/zeker-dertien-doden-door-noodweer-spanje-wateroverlast-vertraagt-hulpverlening.html

Dozens killed as Spanish region hit by year's worth of rain in eight hours

At least 51 people are known to have died after torrential rain caused devastating flash floods in south-eastern Spain.

In the town of Chiva near Valencia more than a year's worth of rain fell in just eight hours and local officials say it is "impossible" to put a final figure on the number of people who have perished.

Footage uploaded to social media shows floodwaters causing chaos in the wider region, knocking down bridges and dragging cars through the streets. Other video appears to show people clinging to trees to avoid being swept away.

Much of the country has been badly hit by heavy rain and hailstorms, triggering rapid flooding across multiple areas.

...

https://www.bbc.com/news/articles/c93qlpp5gxvo
« Last Edit: October 30, 2024, 11:14:16 AM by kassy »
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nadir

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Re: Floods
« Reply #1077 on: October 30, 2024, 06:00:59 PM »
I wonder if the floods in Valencia and other places in Spain have something directly related to the currently exceeding warm Arctic atmosphere. In fact these storms happen because cold Arctic air leaves the North latitudes and displaces south colliding with humid Mediterranean air. This time the build up of these rains was enormous and very fast.

vox_mundi

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Re: Floods
« Reply #1078 on: October 30, 2024, 06:48:58 PM »
Spanish Floods Kill 72 as Year of Rain Falls In a Day In Valencia
https://www.reuters.com/world/europe/heavy-rains-cause-flash-floods-spains-south-east-2024-10-29/

Meteorologists said a year's rain had fallen in eight hours in parts of Valencia on Tuesday, causing pile-ups on highways and submerging farmland in a region that produces two-thirds of the citrus fruit grown in Spain, a leading global exporter.

Footage shot by emergency services from a helicopter showed bridges that had collapsed and cars and trucks piled on top of each other on highways between flooded fields outside the city of Valencia.

Some parts of Valencia such as the towns of Turis, Chiva or Bunol recorded more than 400 mm (15 inches) of rainfall, leading the state weather agency AEMET to declare a red alert on Tuesday. It was lowered to amber on Wednesday as the rain eased.

The death toll appeared to be the worst in Europe from flooding since 2021 when at least 185 people died in Germany.

It is the deadliest flood-related disaster in Spain since 1996, when 87 people died near a town in the Pyrenees mountains.

ASAJA, one of Spain's largest farmer groups, said on Tuesday it expected significant damage to crops.

Spain is the world's largest exporter of fresh and dried oranges, according to trade data provider the Observatory of Economic Complexity, and Valencia accounts for about 60% of the country's citrus production, according to Valencian Institute of Agriculture Investigations.

Scientists say extreme weather events are becoming more frequent in Europe due to climate change. Meteorologists think the warming of the Mediterranean, which increases water evaporation, plays a key role in making torrential rains more severe.

There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

Fiat iustitia, et pereat mundus

kassy

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Re: Floods
« Reply #1079 on: October 30, 2024, 07:42:27 PM »
I wonder if the floods in Valencia and other places in Spain have something directly related to the currently exceeding warm Arctic atmosphere. In fact these storms happen because cold Arctic air leaves the North latitudes and displaces south colliding with humid Mediterranean air. This time the build up of these rains was enormous and very fast.

No they are related to a warm Mediteranean bringing moisture to relatively colder land regions. This weather pattern happens more often but it is not usually as bad as this.
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gerontocrat

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Re: Floods
« Reply #1080 on: October 30, 2024, 10:58:23 PM »
https://www.theguardian.com/world/2024/oct/30/we-were-trapped-like-rats-spains-floods-bring-devastation-and-despair

How can our infrastructure cope with what is happening now, let alone with what is to come?



Cars are part of the infrastructure on which we currently rely.



The railway line in this image is modern - the best that is being made today.
« Last Edit: October 31, 2024, 01:33:43 AM by gerontocrat »
"I wasn't expecting that quite so soon" kiwichick16
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vox_mundi

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Re: Floods
« Reply #1081 on: October 31, 2024, 02:46:26 AM »
What caused deadly floods in Spain? The impact of DANA explained
https://www.reuters.com/business/environment/spains-deadly-dana-weather-phenomenon-its-links-climate-change-2024-10-30/

Oct 30 (Reuters) - Catastrophic flash floods that have killed at least 72 people in Spain are caused by a destructive weather system in which cold and warm air meet and produce powerful rain clouds, a pattern believed to be growing more frequent due to climate change.

The phenomenon is known locally as DANA, a Spanish acronym for high-altitude isolated depression, and unlike common storms or squalls it can form independently of polar or subtropical jet streams.

When cold air blows over warm Mediterranean waters it causes hotter air to rise quickly and form dense, water-laden clouds that can remain over the same area for many hours, raising their destructive potential. The event sometimes provokes large hail storms and tornadoes as seen this week, meteorologists say.

Eastern and Southern Spain are particularly susceptible to the phenomenon due to its position between the Atlantic Ocean and the Mediterranean Sea. Warm, humid air masses and cold fronts meet in a region where mountains favour the formation of storm clouds and rainfall

This week's DANA was one of the three most intense such storms in the last century in the Valencia region, Ruben del Campo, spokesperson for the national weather agency Aemet, said.

"Forecasts were in line with what happened. But in an area between Utiel and Chiva, in the province of Valencia, rainfall exceeded 300 litres per square meter. In that area, storm systems formed and regenerated continuously," he explained.

She said even early warnings of heavy rain based on reliable forecasts did little to prevent the fatalities and people needed to understand the real danger

... Before the term DANA was coined in the early 2000s, any heavy rainfall in the autumn, characteristic of the Mediterranean climate, used to go by the popular name "gota fria" (cold drop) in Spain and parts of France. The term is still widely used colloquially.

Its origin dates back to 1886 when German scientists introduced the idea of "kaltlufttropfen", or cold air drop, to describe high altitude disturbance but without apparent reflection on the surface.

Aemet says the concept of cold drop is outdated and defines DANA as a closed high-altitude depression that has become isolated and separated from an associated jet stream. Aemet says DANAs sometimes become stationary or even move backwards, from east to west.
There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

Fiat iustitia, et pereat mundus

be cause

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Re: Floods
« Reply #1082 on: October 31, 2024, 11:25:51 AM »
facebook reports confirm it was seeded . Even my friends in Valentia are sure . FFS .
We live in a Quantum universe . Do you live like you do ?

gerontocrat

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Re: Floods
« Reply #1083 on: October 31, 2024, 05:19:40 PM »
facebook reports confirm it was seeded . Even my friends in Valentia are sure . FFS .
And someone will post the quote leaving out "FFS" to say the ASIF agrees the storm was seeded.

And someone will take my words "the ASIF agrees the storm was seeded."

Misinformation rules, OK?
"I wasn't expecting that quite so soon" kiwichick16
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kassy

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Re: Floods
« Reply #1084 on: October 31, 2024, 07:55:02 PM »
Death  toll over 150. The area is also a very important producer of tomatoes, aubergines and bell peppers. Lots of damage to the polytunnels so these will be more expensive this winter.
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Sublime_Rime

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Re: Floods
« Reply #1085 on: October 31, 2024, 07:57:02 PM »
Aye Aye Gero, but I think misinformation just takes advantage of how challenging it is for us humans to cope with a hyperobject as complex as AGW combined with our other impacts on the ecosphere. Its much easier and satisfying to blame things on a discreet malevolent force like the government or just "them". It then becomes very easy for those with selfish interests (e.g. fossil fuel industry and their political partners) to shift the blame.

What would be the motivation for seeding here? Who would benefit? I think one would need extraordinary evidence to make such an extraordinary claim.
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be cause

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Re: Floods
« Reply #1086 on: October 31, 2024, 08:16:14 PM »
pursuing an answer ( from Spain) I find that all country bumkins everywhere are being driven into '15 minute cities ' and the weather is being used to drive them off the land . The brain dead are rising up !
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gerontocrat

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Re: Floods
« Reply #1087 on: November 01, 2024, 06:11:31 AM »
What would be the motivation for seeding here? Who would benefit? I think one would need extraordinary evidence to make such an extraordinary claim.
Unfortunately, it seems that a disturbingly large number of people see no need for evidence of any kind to believe what they want to believe.
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kassy

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Re: Floods
« Reply #1088 on: November 01, 2024, 05:29:23 PM »
Technically we seeded these rains globally by increasing the average temperature of the world. Delivery is a bit random.

These events have a long history in the area. They are not usually as bad as this but since the temperatures only go up it will be worse in the future. It will also be more likely because water holds on to heat better then land.

From bbc feed:

Quote
The A-3 motorway connecting Valencia to Madrid was one of many roads where motorists were trapped as the water level rose, leaving them unsure whether it was safer to stay in the vehicle or not.

“There are almost certainly more people who have died because the water washed people away who had got out of their cars,” one survivor tells Telecinco television.

Another survivor says the water had risen up to his chest.

An eyewitness describes seeing one driver who had got out of his car and strapped himself to a lamppost with his belt to prevent being washed away.

The mayor of Chiva, Amparo Fort, warned on Thursday that nearby there were still “hundreds of cars turned upside down and they will surely have people inside them".

Quote
Torrential rain has been falling over recent hours in the southern Andalucian region of Huelva in south-west Spain.

The city of Cartaya has already seen more than 127mm since midnight. That’s around two month’s worth in just ten hours. A red warning in this region is in force until 14:59 this afternoon.

Further east, orange rainfall warnings also cover parts of northern Valencia, southern Catalonia and all the Balearic Islands, where thunderstorms are expected to accompany the further downpours that slowly ease into tomorrow.

https://www.bbc.com/news/live/cgk1m7g73ydt
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nadir

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Re: Floods
« Reply #1089 on: November 01, 2024, 06:07:37 PM »
The seeding theory does not make sense in this case. Note the trough or depression at high levels of atmosphere over an very extensive area, almost the entire peninsula. This is a well known atmospheric event called “gota fría” or DANA nowadays, that happens every few years and mostly affects the Mediterranean coast on September/October. I cannot imagine human intervention capable of creating this enormous bag of Arctic cold air on top of hot humid Mediterranean air.

It was just incredibly huge this time and the “ground zero” of the storm happened over a very densely populated area which also canalizes the rain water coming from the inland mountains and has no means to deviate a flooding by using storm pools or other subterranean constructions. The terrain is too loose and too close to the Sea to build an efficient system of this type. The channels and “ramblas” were overflooded very soon.

Sigmetnow

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Re: Floods
« Reply #1090 on: November 02, 2024, 01:15:28 PM »
Paul Kedrosky
 
Apropos the tragic Valencia flooding, it is worth noting the role that channelizing and re-routing the Turia River played here.
 
After terrible floods in 1957, the Turia was, over more than a decade, and in a massive engineering project, re-routed south of the city. Its former course became sunken gardens (see attached figure of the former and new course).
 
The recent floods, as a result, followed the post-1957 channelized course, as you can see in the attached animation (via @WxNB_).

➡️  https://x.com/pkedrosky/status/1852452567844020565
[Scroll down to the satellite map, or see the screencap below.]

Two implications can be drawn, one hydrological, one human.
 
1. Planners thought the city would grow north and west post-rerouting, but it largely grew south, straddling the new Turia course, increasing risk in the event of any future flooding.
 

2/ Channelized rivers have many consequences, one of which is they flow faster, like a smoothed bobsled run, increasingly the flooding risk downstream as more water gets there faster, which happened here.
 
The scale of the current tragedy continues to grow, but it is worth considering complexity and the second- and third-order consequences of the original decision to re-route the Turia south of Valencia. There are no good answers, of course, but there are always more questions.
 
https://threadreaderapp.com/thread/1852452564916474240.html
« Last Edit: November 02, 2024, 01:25:17 PM by Sigmetnow »
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morganism

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Re: Floods
« Reply #1091 on: November 02, 2024, 07:41:48 PM »

Dave Throup @DaveThroup 21h

Turis rain gauge data has been retrieved and it’s incredible

680mm daily total
179mm in one hour - an all time Spanish record
42mm in 10 minutes

Also 1 hour of data is still missing and it’s expected the final total will be around 700mm

The average annual rainfall for this location of 475mm was recorded in 3 hours 20 minutes!

Frankly terrifying. Via @AEMET_CValencia

https://nitter.poast.org/DaveThroup/status/1852463815176401243#m


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morganism

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Re: Floods
« Reply #1092 on: November 04, 2024, 11:36:01 PM »
Kalingrad, the new permanent home of the Olympic Village

vox_mundi

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Re: Floods
« Reply #1093 on: November 05, 2024, 06:03:03 PM »
There are 3 classes of people: those who see. Those who see when they are shown. Those who do not see

Insensible before the wave so soon released by callous fate. Affected most, they understand the least, and understanding, when it comes, invariably arrives too late

Fiat iustitia, et pereat mundus

kassy

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Re: Floods
« Reply #1094 on: November 08, 2024, 10:13:23 PM »
New floods have hit the region of Girona in north-eastern Spain, sweeping away around 30 cars in the town of Cadaqués, according to Spanish media reports.

Videos posted by a local journalist showed a torrent of water gushing down the street and a pile of cars blocking a bridge early on Friday.

No casualties were reported in the latest round of flooding to hit the country.

...

Catalonia's meteorological service issued a rain warning from Friday evening until Saturday afternoon for the area of Alt Emporda, where Cadaqués is located. The weather agency warned rain intensity could exceed 20 mm (0.7 inches) in 30 minutes.

The agency recorded 76.8 mm (3 inches) of rain in Cadaqués on 7 and 8 November, with more than 100 mm logged in two other towns nearby.

Spain received 72% more rainfall from 1 October to 5 November than the normal value for that time period, according to Aemet, Spain's weather agency.

...

https://www.bbc.com/news/articles/crk4zlkdgk8o
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Sigmetnow

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Re: Floods
« Reply #1095 on: November 18, 2024, 03:22:34 AM »
Flower Show

The heavy rains that have fallen in recent weeks in the Namibia Desert in Africa have caused one of the most spectacular natural phenomena, the flowering of millions of lilies that for tens of kilometers have covered the sandy soil that has dried completely for three years.
 
11/16/24, https://x.com/theflowershow/status/1857735110415544744
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Sigmetnow

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Re: Floods
« Reply #1096 on: November 19, 2024, 02:57:58 AM »
U.S. Northwest

Colin McCarthy
@US_Stormwatch
Getting concerned about potentially significant flooding in parts of Northern California and Oregon next week due to an intense, long-duration atmospheric river, which could bring up to 24 inches (0.61m) of rain.
 
A Category 5 atmospheric river is possible. Stay tuned.
11/17/24, ⬇️ https://x.com/us_stormwatch/status/1858238497938956763
 
< so every time it rains in california we just call it an atmospheric river now?
Colin McCarthy
No. Atmospheric rivers typically account for 30-50% of California's annual precipitation.

< Now there’s categories to AR’s 🤨
Colin McCarthy
The scale was released 5 years ago and is based on strength and duration of an atmospheric river. Category 5 is considered "primarily hazardous."
11/17/24, ⬇️  https://x.com/us_stormwatch/status/1858364201779225000

< What is IVT magnitude, and how do they measure that?
<< AR FAQ’s  ➡️  https://cw3e.ucsd.edu/wp-content/uploads/AR_FAQ’s.pdf
« Last Edit: November 19, 2024, 01:37:40 PM by Sigmetnow »
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