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Susan Anderson

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Re: Floods
« Reply #150 on: May 28, 2018, 08:02:51 PM »
For the bigger picture in the western hemisphere, here:
http://rammb-slider.cira.colostate.edu/?sat=goes-16

Sigmetnow

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Re: Floods
« Reply #151 on: May 28, 2018, 09:30:29 PM »
Severe flooding in the UK, as well.  Also, heat.
Quote
A man in his 80s died after his car was submerged in flood-waters amid a deluge of rain across the West Midlands.  Rescuers had to swim 50m to reach the motorist, whose vehicle was "completely underwater" in Walsall.

In Birmingham, more than a month's rainfall hit parts of the city in an hour on Sunday. Areas of Northamptonshire were also flooded.

Weather warnings have been issued for Monday, while the South East could see the hottest day of the year so far.
...
In Birmingham, one major route in the city was rendered impassable by water up to 5ft (1.5m) deep.
The Met Office said a site at Winterbourne, in Edgbaston, recorded 58mm of rainfall in just one hour on Sunday afternoon, and 81mm in a 12-hour period.  The monthly average for the West Midlands region in May is 55mm, Mr Snell said.

But he said the torrential rain had been "very localised", pointing out that another site 10 miles away at Coleshill recorded just 3mm of rain in 12 hours. ...
http://www.bbc.com/news/uk-england-birmingham-44275045
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wili

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Re: Floods
« Reply #152 on: May 29, 2018, 09:53:31 PM »
https://robertscribbler.com/2018/05/29/how-climate-change-contributed-to-ellicott-citys-back-to-back-historic-flood-events/

How Climate Change Contributed to Ellicott City’s Back-to-Back Historic Flood Events
"A force de chercher de bonnes raisons, on en trouve; on les dit; et après on y tient, non pas tant parce qu'elles sont bonnes que pour ne pas se démentir." Choderlos de Laclos "You struggle to come up with some valid reasons, then cling to them, not because they're good, but just to not back down."

Sigmetnow

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Re: Floods
« Reply #153 on: May 29, 2018, 10:05:03 PM »
Ellicott City: An old downtown in a new flood plain.

The Maryland Flooding Is a Warning: The Danger Is Rain, and We’re Making It Worse
Quote
Ellicott City isn’t some post-war boomtown built inside a reservoir or a vacation community playing chicken with the ocean waves. It’s a 250-year-old river town, and like many river towns, it’s known flooding, chiefly from the rising waters of the Patapsco, the river at the foot of town that drains into Baltimore Harbor.

But these past two storms—as well as September 2011 flooding from Tropical Storm Lee—have worked differently. Instead of the water rising from the river at the base of the town, it’s come roaring in down two tiny tributaries, the Tiber and the Hudson, which merge just before entering the Patapsco. According to a Baltimore Sun investigation, prior to 2011, it had been 60 years since runoff on the Tiber stream produced a flash flood. Now it has happened three times in seven years.

It’s a reminder that heavy rain, rather than rising seas, may be the earliest severe consequence of climate change. We’ve prepared for it in the worst way possible. ...
https://slate.com/news-and-politics/2018/05/ellicott-city-maryland-flooding-climate-change-is-coming-as-rain.html
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SteveMDFP

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Re: Floods
« Reply #154 on: June 02, 2018, 06:43:30 PM »
Many here read about the intense, fatal flooding of Ellicott City recently.  This is a neighboring town from me.
Here's an article that goes into some depth about the history and current planning for the next steps for the quaint, charming town center:

http://www.baltimoresun.com/news/maryland/investigations/bs-md-ellicott-city-flood-next-steps-20180531-story.html

Preventing a repetition of this small disaster is, of course, the focus.  All of the options are unattractive and very expensive.
We might consider this a case study of what innumerable towns, cities, and ports will face as sea level rise accelerates in the coming century.

Gray-Wolf

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Re: Floods
« Reply #155 on: June 02, 2018, 08:01:06 PM »

Preventing a repetition of this small disaster is, of course, the focus.  All of the options are unattractive and very expensive.
We might consider this a case study of what innumerable towns, cities, and ports will face as sea level rise accelerates in the coming century.

Our Valley suffered similar over the last decade. The problem was always there with the River suffering flooding over the centuries but the last 40 years had seen repeated schemes go in to alleviate the problem. Still the floods came and beat previous 'record' levels.

The last major ( Boxing Day 2015) has lead to investment and a level of schemes fit for at least 50 years of increasing rainfall totals.

Sadly the towns down river have not seen such investment so when our works are done our floods will just pass faster to the next town which , until now, have been spared from flooding by the Flooding of our towns.

As you move down river the towns get larger.

Sadly the monies will just not be there for them to also see the kind of investment we have received.


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Sigmetnow

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Re: Floods
« Reply #156 on: June 03, 2018, 03:36:51 PM »
Wondering if The Boring Company and its faster and cheaper tunnel boring machine could became a solution of choice for addressing increased flood event risk in locations with the appropriate geography.

Saving flood runoff underground, for later treatment and usage, might also be desirable in some places.
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Shared Humanity

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Re: Floods
« Reply #157 on: June 03, 2018, 05:14:35 PM »
Wondering if The Boring Company and its faster and cheaper tunnel boring machine could became a solution of choice for addressing increased flood event risk in locations with the appropriate geography.

Saving flood runoff underground, for later treatment and usage, might also be desirable in some places.

Improvements in boring technology will dramatically reduce the costs of deep tunnel projects for the capture, sequester and later treatment of flood waters. That being said, deep tunnel projects are useful for regional flooding issues. The Baltimore metro region would need to address flooding using this approach. In Chicago, MWRD has shifted its focus from "How big a pipe and how deep a hole?" to area wide micro approaches that look at enhancing small area watersheds and community efforts as small as water gardens in backyards. The idea is to prevent heavy rainfalls from ever reaching rivers and streams.

be cause

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Re: Floods
« Reply #158 on: June 03, 2018, 06:36:31 PM »
this forum is suffering from Elongation .. b.c.
2007 + 5 = 2012 + 4 = 2016 + 3 = 2019 ...

Sigmetnow

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Re: Floods
« Reply #159 on: June 03, 2018, 08:58:00 PM »
Too bad this isn’t happening on a day Congress is in session.  Not that that would make a diference....

“Washington, DC is experiencing heavy rain this Sunday. Details on the rain and #flood risk here: (link: http://bit.ly/2Hh8r3s) l
 https://twitter.com/weatheroptics/status/1003338361044656128

“Just sheets of water cascading down on NW DC right now ”
https://twitter.com/mateagold/status/1003334763728572417
Image below; video clip at the link.

“NEW: Flood warning in the District, S Mont Co, central & E Fairfax co. NWS: "Stream gauges indicate Cameron Run near Alexandria, Rock Creek in the northwest District of Columbia, and Sligo Creek near Takoma Park may being flooding soon." More info: (link: https://wapo.st/2kLp3I5)”
 https://twitter.com/capitalweather/status/1003350156341841920
Map below.
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Sigmetnow

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Re: Floods
« Reply #160 on: June 03, 2018, 10:02:35 PM »
Maryland, U.S.
“Just plotted the 15 catastrophic floods in #EllicottCity...”
https://twitter.com/adapt2climate/status/1001203384408395776
Image below.
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Sigmetnow

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Re: Floods
« Reply #161 on: June 06, 2018, 06:06:11 PM »
U.S. monthly climate report.

Quote
Buried in this month's NOAA climate report:

"More than a quarter of the coastal locations tied or broke their individual records for high tide flood days."

The whole short report is worth a read—a snapshot of what climate change looks like in the U.S.:

https://www.ncei.noaa.gov/news/national-climate-201805
https://twitter.com/EricHolthaus/status/1004389182809214978
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aperson

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Re: Floods
« Reply #162 on: June 07, 2018, 04:22:43 AM »
The Harris County Flood Control District report on Harvey was published today. It is available at https://www.hcfcd.org/hurricane-harvey/. I highly recommend reading it, it is a wild ride.

Selected Quotes:
Quote
60,049 residents were rescued by government resources across all portions of Harris County, most of them from their homes with 32,000-34,000 staying in 65 temporary shelters. Tens of thousands of additional residents were rescued by local civilian resources and help that arrived from around Texas and surrounding states.

...

It is estimated that over 300,000 vehicles were flooded across Harris County many of which were at homes, parking garages, and dealership lots.

Quote
Dr. John Nielson-Gammon examined the largest rainfall events ever recorded in
United States history and compared against Hurricane Harvey for durations of 48, 72, and 120
hours and in spatial coverage of 1,000, 2,000, 5,000, 10,000, 20,000, and 50,000 square miles.
Harvey exceeded the previous records in all of the 18 different combinations except one. The
most astounding statistic is that for the 120 hour duration over 10,000 square miles, Harvey
exceeded the previous record from June 1899 by 13.33 inches or 62%.

Quote
Of the 154,170 homes flooded, 48,850 were within the 1% (100-yr) floodplain, 34,970 within the .2% (500-yr) floodplain, and 70,370 were outside of the 1% (100-yr) and .2% (500-yr) floodplains. Of the 154,170 homes flooded, 105,340 or 68% were outside the 1% (100-yr) floodplain.

...

64% of the homes flooded did not have a flood insurance policy in effect.
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Sigmetnow

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Re: Floods
« Reply #163 on: June 07, 2018, 04:25:06 PM »
One thing I will always remember about Hurricane Harvey is those astounding forecast maps of unbelievable amounts of rain... and people saying, “No, that can’t be right.  Don’t panic.“  I think we know better, now. One hopes we will prepare better, and act better, next time.
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Shared Humanity

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Re: Floods
« Reply #164 on: June 07, 2018, 10:17:53 PM »
How do you better prepare for 50 inches of rain?

aperson

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Re: Floods
« Reply #165 on: June 07, 2018, 10:37:07 PM »
How do you better prepare for 50 inches of rain?

Not by building more houses in the 100 and 500 yr floodplains, that's for sure.

http://swamplot.com/piles-of-fill-dirt-now-giving-rise-to-lovett-homes-77-lot-neighborhood-in-white-oak-bayou-floodplain/2018-06-05/

http://swamplot.com/where-another-new-subdivision-will-slot-into-the-white-oak-floodplain-east-of-t-c-jester/2018-06-06/


Developers need a boot on the head to stop them from doing this sort of stupid shit. Unfortunately instead we just have crap like NFIP ready to bail out homeowners at a moment's notice so developers can wash, rinse, and repeat the development cycle while municipal government continues to rake in property taxes.
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Clare

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Re: Floods
« Reply #166 on: June 08, 2018, 01:34:52 AM »
This image is from last week, I was shocked. Slash is the rubbish left from when an area has been logged. It is meant to be cleaned up! We are looking at increasing forestry to reduce our CO2 footprint.  :(
The rainfall that caused this flooding wasn't extreme extreme, but so many of the problems were caused by these logs.


In the article linked below you can see the beach. :'(
https://www.radionz.co.nz/news/national/358981/tougher-rules-needed-to-stop-logging-debris-environmentalist
This is not the first time slash has caused serious problems north of where I live.


Sigmetnow

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Re: Floods
« Reply #167 on: June 09, 2018, 12:58:22 AM »
How do you better prepare for 50 inches of rain?

Not building in floodplains, sure.  But I was thinking more along the lines of continuing “psychological readiness” — getting people to think about, and make preparations ahead of time, for what they would do in such an emergency.

And, more orderly and aggressive evacuation plans (like highway contraflow), that start days earlier, instead of the mayor not giving an evacuation order because “surely it won’t be that bad,” and because the last time mass evacuation was tried, thousands of people became stranded and stuck on the highway.
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Sleepy

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Re: Floods
« Reply #168 on: June 09, 2018, 07:19:46 AM »
Hmm, psychological readiness, like in Gothenburg were they recently kicked off the next "big dig". 8km's of rail with 6km's worth of tunnels, in clay, much like Boston.
https://www.svt.se/nyheter/lokalt/vast/forsta-spadtaget-for-vastlanken

All of that will at best be an island in the future.

Or the new submerged tunnel below Göta Älv that's beeing built right now, Marieholmstunneln.


Gothenburg already have older tunnels of course but none of that magnitude, not even comparable in projected costs.

Real costs might approach Boston's.

They also have plans for levies of course, both inland and upstream at Göta Älv and out towards the ocean in two locations. All based on IPCC's 90cm's worth of sea level rise towards the next century.

Then there's also a problem with projected increased precipitation, Mölndalsån is already prone for flooding and has flooded many times in the past.

It doesn't really matter from wich perspective you look at these projects, environmentally, climate wise or even engineering wise, they are plain ignorant and stupid. There are alternatives in Gothenburg. But we also have our Tillman Fertitta's here too:
https://forum.arctic-sea-ice.net/index.php/topic,1951.msg150361.html#msg150361

Image below from central Gothenburg during storm Gudrun, in 2005. Forgotten by now.
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Tor Bejnar

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Re: Floods
« Reply #169 on: June 11, 2018, 07:45:21 PM »
For those who are interested, visit the website  http://floodlist.com/

For example, recent articled titled
  • Mexico – Flash Floods in Jalisco State as Hurricane Bud Intensifies
  • China – Over 70,000 Evacuate Floods and Landslides From Typhoon Ewiniar
  • Kenya – Number of Flood Deaths Rises to 186 After Highest Rainfall in 50 Years
  • Report – Flood Losses in Europe to Increase Fivefold by 2050
  • Lessons in Resilience: What City Planners Can Learn From Hobart’s Floods
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Re: Floods
« Reply #170 on: June 11, 2018, 10:09:08 PM »
All based on IPCC's 90cm's worth of sea level rise towards the next century.
Wow! What has become of the Swedes? This is American level stupidity.

Clare

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Re: Floods
« Reply #171 on: June 12, 2018, 06:57:47 AM »
A week later & yet more flooding in NZ, and much of it  in the same areas as last weeks. Weather system coming south to us from the tropics, MOST unusual for this time of year - winter! Live feed here with short video clips:
https://www.tvnz.co.nz/one-news/new-zealand/raw-gisborne-bop-east-coast-north-island-hammered-torrential-rain-and-high-winds

Refer to my earlier story, that storm damaged 61 bridges & caused an estimated $10M in damage in the Tolaga Bay/Easy coast region alone.

Not quite as bad where I live a bit farther south, seemed the perfect day for it = we went to the movies!
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Re: Floods
« Reply #172 on: June 12, 2018, 08:44:54 AM »
All based on IPCC's 90cm's worth of sea level rise towards the next century.
Wow! What has become of the Swedes? This is American level stupidity.
Yep, I've called it (us) the 51st state for a long time, Martin.
Don't want to drift into politics here but only 3% of males here sympathize with MP (our green party) and 1/3 support the SD (Sweden Democrats) today, which is rather telling. Workers are leaving S (Social Democrats) for SD. Also, 40 organizations made this call yesterday.
https://www.aftonbladet.se/debatt/a/G1bdOV

Quote
Climate change, conflicts and the threats to democracy are some of the many examples of global development issues that the parties in Sweden must actively work with.

I might be overly preoccupied with Gothenburg but I grew up there, that place will be an island beach house in the future. None of these tunnels they are building today will be operational by then. I saw when they built the Götatunnel (which is a lot smaller), original budget was 2.1 billion and ended up around 3.7. These digs for Västlänken with be much, much wider. In clay with increased pressure from below. This won't be easy.
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Re: Floods
« Reply #173 on: June 12, 2018, 01:32:28 PM »

I might be overly preoccupied with Gothenburg but I grew up there, that place will be an island beach house in the future. None of these tunnels they are building today will be operational by then. I saw when they built the Götatunnel (which is a lot smaller), original budget was 2.1 billion and ended up around 3.7. These digs for Västlänken with be much, much wider. In clay with increased pressure from below. This won't be easy.

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Re: Floods
« Reply #174 on: June 12, 2018, 04:22:09 PM »
 :)
That information won't come from the Tourist centre at Nordstaden, in case of a catastrophic collapse of the WAIS.
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Re: Floods
« Reply #175 on: June 21, 2018, 12:34:39 AM »
U.S.:  severe Texas coastal flooding from an unnamed “tropical disturbance”

Heavy Rain in South Texas Could Bring More Flooding Before Tropical Disturbance Washes Out
Quote
Heavy rainfall in south Texas Wednesday morning caused major flooding that has submerged vehicles and structures, forced evacuations and led to numerous water rescues.

The National Weather Service (NWS) had issued two flash flood emergencies in south Texas following 6-14 inches [355 mm] of rainfall early this week. More rainfall is possible through early Thursday.
...
Storm Reports
The heavy rain has caused roads to crumble in McAllen, the location of the first flash flood emergency. Some communities in McAllen and surrounding communities, including Weslaco, have seen 4-8 inches of rain. Weslaco picked up more than 11 inches of rain. ...
https://weather.com/forecast/regional/news/2018-06-18-texas-tropical-moisture-heavy-rain-drought-relief-flood-threat
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Sigmetnow

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Re: Floods
« Reply #176 on: June 21, 2018, 11:38:09 PM »
U.S.:  Rain continues to flood Texas.

“McAllen shattered rainfall records Thursday morning with an estimated 10 inches of rain since 4 a.m., according to the National Weather Service”

Gov. Abbott issues disaster declaration for severe flooding across South Texas
https://www.mysanantonio.com/news/local/article/Corpus-Christi-gets-triple-normal-rainfall-for-13013910.php
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gerontocrat

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Re: Floods
« Reply #177 on: July 07, 2018, 11:34:14 AM »
https://www.theguardian.com/world/2018/jul/07/heavy-rain-floods-and-landslide-leave-more-than-a-dozen-dead-and-50-missing-in-japan

Heavy rain, floods and landslide leave 15 dead and 50 missing in Japan
Although Japan is among the most modernised of Asian nations, rural areas are hit hard by the rainy season each year, often resulting in casualties and heavy damage.
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Sigmetnow

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Re: Floods
« Reply #178 on: July 07, 2018, 04:51:58 PM »
A bit more on the floods in Japan:

38 Dead, Nearly 50 Still Missing After Torrential Downpours in Japan
https://weather.com/news/news/2018-07-07-deadly-floods-southwestern-japan-okayama

Also, a 5.9 magnitude earthquake struck off the coast from Tokyo about three hours ago (about 500 km/300 miles from Okayama).  Early reports said buildings shook, but no significant damage was reported.
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Sigmetnow

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Re: Floods
« Reply #179 on: July 08, 2018, 12:39:46 AM »
“This is a record high rainfall which we never experienced.”

Update:
Japan Reels From Heavy Rains; Dozens Killed and Millions Evacuated
Quote
TOKYO — Record torrential rains across western and central Japan unleashed flooding and landslides in several residential areas, killing dozens and triggering weather warnings in four districts of the country.

By Saturday evening, at least 51 people were dead and 48 were missing, according to the public broadcaster NHK. More than one million people in 18 districts had been ordered to evacuate their homes and 3.5 million had been urged to leave.

The Japan Meteorological Agency reported on Saturday that rainfall in many of the affected areas had reached record levels — with some areas reporting rain two or three times as high as the monthly average for all of July over just five days. ...
https://www.nytimes.com/2018/07/07/world/asia/japan-rain-landslides.html
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Re: Floods
« Reply #180 on: July 08, 2018, 06:59:38 AM »
"44 inches of rain fell on Yanasa in Umaji village, Kochi prefecture, on Shikoku, in only three days - that's double the total amount that usually falls in the whole of July."

Sounds like Harvey's twin in the Pacific...

https://www.standard.co.uk/news/world/hundreds-of-thousands-of-people-forced-to-flee-their-homes-as-two-months-worth-of-rain-falls-in-a3881386.html


Sigmetnow

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Re: Floods
« Reply #181 on: July 09, 2018, 12:47:41 AM »
Japan flood update.  Yikes!

Flooding and landslides in Japan leave at least 85 dead
Quote
Dozens of people have been killed and 2 million forced to flee their homes after record rains pounded southwest Japan, triggering widespread flooding and deadly landslides.

Authorities said that 85 people are dead, 6 are in critical condition and at least 58 are missing, according to Japanese broadcaster NHK.

"The record rainfalls in various parts of the country have caused rivers to burst their banks, and triggered large scale floods and landslides in several areas," Cabinet Secretary Yoshihide Suga said Sunday.
...
At least 4 million people have been advised to evacuate surrounding areas. Government officials are warning people in affected areas they are at risk for landslides, flooding, wind gusts and other extreme weather conditions.
https://amp.cnn.com/cnn/2018/07/08/world/japan-flooding/index.html
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Re: Floods
« Reply #182 on: July 09, 2018, 01:05:10 AM »
Are 40+" rain evens becoming the norm? 

Harvey in Aug '17 ~50"

Kauai in Apr '18 ~50"

Southern Japan Jul '18 ~44"

Have there been any others recently?  I believe Australia has seen some "Biblical" flooding in recent years, but nothing this bad.

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Re: Floods
« Reply #183 on: July 10, 2018, 06:41:05 PM »
Update (BBC):  Japan floods: 155 killed after torrential rain and landslides
Quote
...
It is the highest death toll caused by rainfall that Japan has seen in more than three decades.

Rescuers are now digging through mud and rubble in a race to find survivors, as dozens are still missing.

About two million people have been evacuated from the region after rivers burst their banks.
...
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Tor Bejnar

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Re: Floods
« Reply #184 on: July 12, 2018, 05:23:42 PM »
Another day, another sad update for Japan.  This one from Dave Petley's AGU Landslide Blog

... the disastrous landslides in Japan this week

Quote
Over the last few days Japan has suffered from record levels of rainfall, triggering large numbers of landslides.  In total at least 200 people have been killed in flood and landslide events.
...
At least 47 sections of expressway have been damaged by the landslides.

This is without doubt the most significant landslide event of 2018 to date. 
...
Images at the link above.

And from Weather Underground:
Quote
... deadliest weather disaster since 322 people were killed in floods and landslides across western Japan in July 1982.
« Last Edit: July 12, 2018, 09:25:50 PM by Tor Bejnar »
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Susan Anderson

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Re: Floods
« Reply #185 on: July 12, 2018, 09:00:11 PM »
@Tor Bejnar: Thanks (if thanks are in order for bad news) for the updates on Japan. Horrifying stuff.

I looked in at my old favorite EarthObservatory - https://earthobservatory.nasa.gov/ - which has recently been redesigned, to see if there are images there. As is always the case, it will take me a while to enjoy the "improvement" which no doubt it is. Couldn't find grid view of the images, but here is one on the flooding from last week: https://earthobservatory.nasa.gov/images/92397/severe-rainfall-and-flooding-in-japan

Proceeding in potpourri style, Typhoon Maria: https://earthobservatory.nasa.gov/images/92409/powerful-typhoon-heads-for-china

and hail in North Dakota: https://earthobservatory.nasa.gov/images/92401/hail-cuts-swaths-of-damage-across-south-dakota

Sigmetnow

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Re: Floods
« Reply #186 on: July 22, 2018, 04:23:32 PM »
Washington, DC area.
“At least 2.85 inches of rain for DC today. 2.79 inches on the 17th as well. First time on record (since 1871) that we've had more than one day with 2.75"+ [70mm] of rain in July.
DC started July with zero inches through the 16th, driest start to the month on record. @capitalweather”
https://twitter.com/islivingston/status/1020824764418576389

“Dulles [airport] has picked up 3.86 inches [98mm] of rain thru 8p, including 1.11 inches last hour.
This is now the wettest July day on record there, surpassing 3.71 inches on the 11th in 2013. Likely becoming a top 10 wettest day in any month there. @capitalweather”
https://twitter.com/islivingston/status/1020821987902488577
Data-image at the link.

“740p: Flash flood warning S and SW of Beltway. 3-4” of rain have fallen & another 1-3” poss. Please use caution.”
https://mobile.twitter.com/capitalweather/status/1020816043072245760
Radar loop at the link.

“5.51” [140mm] of rain now in Oakton, VA. We still have a few more hours before the rain finally subsides. ...”
https://twitter.com/DCAreaWx/status/1020833562671681537
Data-image at the link.
« Last Edit: July 22, 2018, 06:30:04 PM by Sigmetnow »
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Sigmetnow

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Re: Floods
« Reply #187 on: July 22, 2018, 06:34:39 PM »
More on the mid-Atlantic US flooding.  Jet stream flow will persist through the week.

“Extreme amounts of #rain fell from an unusual July coastal low pressure  system.  Widespread amounts of 2-6" fell with several reports of over 7" & as much as 9.11" [231mm] in Storck (Stafford Co.), VA.”
https://twitter.com/NWSMARFC/status/1020996157730967558

More Flash Flooding Possible in the East This Week as Tropical Moisture Fuels Heavy Rainfall
https://weather.com/amp/forecast/regional/news/2018-07-18-wet-eastern-weather-pattern-late-july.html
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jacksmith4tx

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Re: Floods
« Reply #188 on: July 22, 2018, 08:03:51 PM »
More on the mid-Atlantic US flooding.  Jet stream flow will persist through the week.

“Extreme amounts of #rain fell from an unusual July coastal low pressure  system.  Widespread amounts of 2-6" fell with several reports of over 7" & as much as 9.11" [231mm] in Storck (Stafford Co.), VA.”

More Flash Flooding Possible in the East This Week as Tropical Moisture Fuels Heavy Rainfall

Dr. Jennifer Francis, a name many here are familiar with, has been researching this jet stream/arctic interaction for years. She covers the topic of meandering jet streams and links it to pressure gradient changes due to arctic amplification and climate change. I know this was written to explain winter anomalies you can easily replace 'snow' with 'rain' and the theory still seems robust.
http://arctic-news.blogspot.com/2018/02/is-warming-in-arctic-behind-this-years-crazy-winter-weather.html

I think these high pressure atmospheric ridges are what really stresses the biosphere more than just high temperatures.
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jacksmith4tx

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Re: Floods
« Reply #189 on: July 24, 2018, 08:39:05 PM »
"Hundreds Of People Missing After Dam Collapses In Laos"
https://www.npr.org/2018/07/24/631770020/hundreds-of-people-missing-after-dam-collapses-in-laos

The full scale of the disaster isn't yet known.

The state news agency KPL reports that the collapse released 5 billion cubic meters of water.
The flash flooding happened Monday night, according to the state-sponsored Vientiane Times newspaper, which says a "saddle dam" was overcome at a reservoir for a power plant — part of an ongoing project to construct a series of hydroelectric dams in southern Laos.

"Some seven villages home to about 1,300 families and over 6,000 people were under water," the newspaper reports, citing the Attapeu Planning and Investment Department's director, Soulichanh Phonkeo.
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Tor Bejnar

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Re: Floods
« Reply #190 on: July 26, 2018, 05:55:50 PM »
San Antonio Digging Out
Storm causes flooding, knocks out power, in the village of San Antonio, New Mexico (not to be confused with the very large city of San Antonio, Texas).  (San Antonio, NM, by the way, is where Conrad Hilton of Hilton Hotels was raised (grandfather of socialite Paris Hilton) [Further aside: my very first home (as an infant) was the Hilton House in nearby Socorro, NM where Conrad and his mother lived so he could go to high school]).

Quote
Thunderstorms swept through Socorro County Sunday night and Monday morning causing a power outage to the Magdalena, Hop Canyon and Water Canyon areas, and buried much of San Antonio in up to two feet of mud. Or more, depending on where you look.

Highway 1 between Luis Lopez and San Antonio was largely impassable early Monday due to water, mud, rocks and debris from the overflow of Walnut Creek arroyo. Highway 380 was likewise mud-packed between east of the railroad tracks and Interstate 25. Crews were out Monday morning clearing mud and debris from Interstate 25 exit ramps.

The torrential wind and rain started at about 10:30 p.m. Sunday, Janice Argabright of the Owl Bar and Café said. “It began picking up after that,” she said.

The force of water flowing down from the Chupadera Mountains through San Antonio also dislocated a section of tracks of the Burlington-Northern Santa Fe Railroad north and south of the Highway 380crossing.

The Owl was spared of the worst of the flash flood, but mud around the Crane Café was two feet deep or more, and Bobby Olguin of the Buckhorn was working with employees shoveling mud from around the parking lot Monday morning. Olguin said he hoped to reopen today.

The San Antonio Crane café on Pino Street lost a walk-in cooler when rushing waters picked it off the ground in back of the restaurant and carried it down the street and through a fence where it came to rest against the Catholic Church on Highway 1. The Crane’s large propane tank took a similar route. A water stain on the south side of the restaurant indicates splashing waves reached as high as 10 feet through the neighborhood.
...
[image from El Defensor Chieftain (Socorro) newspaper]
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Tor Bejnar

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Re: Floods
« Reply #191 on: July 26, 2018, 06:06:38 PM »
From Albuquerque's KOB-TV: July 17, 2018
Quote
SAN ANTONIO, N.M. - The renowned Owl Bar and Café in San Antonio, New Mexico is closed as they clean up after a powerful rainstorm and flood.

Employees at the cafe have spent the past two days pulling up carpet and clearing mud.

The internal flood damage wasn't overwhelming, however, there is still a lot that needs to happen before the bar and café can reopen.
...
So the flooding was 10 days ago...
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Sigmetnow

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Re: Floods
« Reply #192 on: July 28, 2018, 01:18:30 AM »
Washington, DC and Baltimore Maryland area.

Capital Weather Gang on Twitter: "6:55 pm: A look at the radar estimates in and around Baltimore. This is what was a risk around DC. Plenty of 2-3”+ totals this evening over a short period causing some big problems. https://t.co/xoRBvjvoKb
https://mobile.twitter.com/capitalweather/status/1022978765356507137
Image at the link.

NWS DC/Baltimore on Twitter: "607pm: Stream gauge on Maidens Choice Run near Westgate appears to have risen 13 feet in 26 minutes."
https://mobile.twitter.com/NWS_BaltWash/status/1022967136606736384
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Shared Humanity

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Re: Floods
« Reply #193 on: July 28, 2018, 01:28:37 PM »
DC needs to get 50 inches of rain in 4 days like Houston did with a few Congress Critters and Senators drowning in their limos with their mistresses. That ought to get their attention.

Sigmetnow

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Re: Floods
« Reply #194 on: August 08, 2018, 05:51:00 PM »
Need to update emergency signs:  Use stairs instead of elevator in floods, as well as fires!

https://twitter.com/misener680news/status/1027155084512124928
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Sigmetnow

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Re: Floods
« Reply #195 on: August 09, 2018, 09:48:06 PM »
Destructive Flood Risk in U.S. West Could Triple if Climate Change Left Unchecked
Rocky Mountain and Sierra Nevada communities are at risk from rapidly rising rivers, as ‘rain-on-snow’ flash floods become more frequent under climate change.
Quote
The research provides a grim analysis of a particularly destructive kind of extreme weather event called a "rain-on-snow" flood. Common in mountain regions—and increasing as temperatures rise—these events happen when heavy rains fall on top of deep snowpack, melting it and triggering intense floods.

California's Sierra Nevada Mountains, the Rocky Mountains west of Denver and parts of the Canadian Rockies are especially vulnerable, according to the research published Monday in Nature Climate Change.
...
Every Drop of Water Matters
These floods not only destroy property and crops, they wreak havoc for Western water managers, whose job it is to capture and store enough water for cities, ranchers and farmers to use during the dry summer. If the snowpack melts unexpectedly during a major rain-on-snow event—overwhelming dams and other infrastructure—then water supplies are lost.
...
Avalanches Are Changing, Too
In addition to projected increase in flooding, rain-on-snow events in the Colorado Rocky Mountains are creating unusual avalanches, according to Brian Lazar, a snow scientist with the Colorado Avalanche Information Center.

"Some of the patterns that we've been seeing and relied on for decades to forecast avalanche danger have been changing," he said. "Even in colder climates, we're seeing more rain on snow, more onset of avalanche in mid-winter and more frequent rain-on-snow events at higher elevations.  "We may see things we haven't observed in the historical record," he said.

In Switzerland, rain-on-snow events are unleashing whole new types of avalanches, made not just of snow, said Perry Barthelt, a researcher with the Swiss Federal Institute for Forest, Snow and Landscape Research.

"We're starting to see cascading processes, snow avalanches turning into debris flows, ice avalanches turning into rock avalanches," he said. "We're getting flow types that you can't define to one particular category."  Switzerland is currently revising all its avalanche hazard maps with new climate data to reflect the changing risks.

"Snow is a very interesting material because it exists near its melting point. A small change in temperature has a tremendous influence on the mechanical properties of snow," Barthelt said.  "What we suspect is that we're going to see more of these mixed avalanche types. They are very difficult to predict, and to know how far into the valley they will go."
https://insideclimatenews.org/news/06082018/global-warming-climate-change-floods-california-oroville-dam-scientists
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Sigmetnow

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Re: Floods
« Reply #196 on: August 13, 2018, 02:20:22 PM »
CNN (@CNN).  8/12/18, 10:00 PM
These cars were swept off a dealership lot in Little Falls, New Jersey, after rain showers and thunderstorms caused flooding in the area
https://twitter.com/cnn/status/1028823694230151168
45-second vid: cars floating down river and jamming up by a bridge

North Jersey flooding is worst since [Hurricane] Floyd, says Little Falls mayor
https://www.northjersey.com/story/weather/2018/08/12/little-falls-mayor-flooding-worst-since-floyd/971326002/
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Sigmetnow

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Re: Floods
« Reply #197 on: August 13, 2018, 11:15:33 PM »
Stalled weather pattern has caused major flooding in northeast U.S. three times over the past three weeks.  Another two to three inches of rain is forecast in some areas for tonight.

Quote
The National Weather Service in State College said there were numerous reports of 6 inches [150mm] of rain or more in Schuylkill and Columbia counties.

Meteorologist Aaron Tyburski said the latest downpours followed weeks of a stalled weather pattern that is drawing moisture from the Atlantic Ocean, hitting some communities repeatedly.

"It's been quite a rough go for them over the past three weeks," Tyburski said.
https://www.usnews.com/news/best-states/pennsylvania/articles/2018-08-13/heavy-rains-cause-flooding-prompt-water-rescues

Weather Underground on Twitter: "TONIGHT on #WUTV we're watching the dangerous flood threat in the Northeast. We're also watching the rain across the Plains - helpful for drought, but will we have flooding instead? ...”
https://twitter.com/wunderground/status/1029062944301232128

Justin Michaels on Twitter: "WATCH: Inside one of the homes on Spring Street in #Tremont, PA. This is the third flood in three weeks, and people here say this was the worst as they try to figure out what to do next in this working class community. ...”
https://mobile.twitter.com/jmichaelsnews/status/1029077232113868808
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Sigmetnow

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Re: Floods
« Reply #198 on: August 15, 2018, 01:59:00 PM »
Flash flooding emergency in New York, Pennsylvania.  “Another round of storms for the third day in a row.”

Dozens of disaster declarations and states of emergency are in effect across New York, New Jersey and Pennsylvania after heavy rain and historic flooding. Floodwaters destroyed hundreds of homes.
https://www.cbsnews.com/video/flash-flooding-emergency-in-new-york-pennsylvania/
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bligh8

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Re: Floods
« Reply #199 on: August 17, 2018, 04:37:17 AM »
N.J. weather update: Nearly 8 inches of rain pounds N.J., flooding roads, creating a waterspout

"As of early Monday afternoon, a whopping 7.83 inches of rain was reported in Brick, where township officials declared a state of emergency. Nearly 5.6 inches of rain was reported in Howell Township and almost 5 inches was registered in Wall Township.
Heavy flooding was reported along a three-block section of Spring Lake, and several flooded roads were closed in Neptune Township, emergency management officials noted on social media.
In Sea Girt, numerous roads were flooded and closed to traffic Monday morning, and some traffic signals were out, according to the weather service.

There are some video's posted within the link....The third video posted by the brick township police dept. is of a flooded age restricted community.  My mom use to live there & I know many folks that still live there, most have no reason to have flood insurance and frankly, although nice, is a poorer area to live.

I sat on my back porch watching this unfold and just about when I thought it could not possibly rain harder.....it did.

https://www.nj.com/weather/index.ssf/2018/08/nj_weather_heavy_rain_flash_flooding_waterspout.html

Edit: Where I live in Monmouth County it rained 6 inches in about 4 hrs.

 "...6 inches" Which is about 2inches more than Stormy got.  Credit...hush money
« Last Edit: August 17, 2018, 05:29:04 AM by bligh8 »