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gerontocrat

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Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« on: September 22, 2022, 04:17:47 PM »
Looks like the snow is coming back with a bang, especially in Eastern Siberia.

So I thought time to start the thread.

Images from Nico Sun @ https://cryospherecomputing.com/
click to enlarge
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #1 on: September 23, 2022, 04:55:34 PM »
Looks like the snow is coming back with even more of a bang in Eastern Siberia.

Images from Nico Sun @ https://cryospherecomputing.com/
click to enlarge
"Para a Causa do Povo a Luta Continua!"
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morganism

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #2 on: September 23, 2022, 11:18:01 PM »
Hope it puts out the fires. Siberian Times news hasn't posted anything since late 2021...

https://siberiantimes.com/home/

Niall Dollard

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #3 on: September 25, 2022, 07:01:57 PM »
Rutgers snow anomaly chart shows the positive start in eastern Siberia.

Sublime_Rime

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #4 on: October 21, 2022, 12:31:45 AM »
Things seem to have swung in the opposite direction for all the major regions of snowfall, with total anomaly > 3 million km^2 below 2000-2019 average. Not sure of the implications for this time of year.
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Tor Bejnar

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #5 on: October 21, 2022, 06:38:44 AM »
Less snow on the ground means less insulation so more heat loss and more “cold” stored in the ground. Good for the permafrost.

When my northern New Mexican town plunged to 30 something below, our fruit trees didn’t suffer because we had 20 cm of snow on the ground. Nearby Santa Fe had no snow and lots of fruit trees died.

20 some years ago a town in northern New York had normal cold but no snow and numerous water pipes burst.
Arctic ice is healthy for children and other living things because "we cannot negotiate with the melting point of ice"

El Cid

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #6 on: October 21, 2022, 07:53:26 AM »
Less snow on the ground means less insulation so more heat loss and more “cold” stored in the ground. Good for the permafrost.

I think it is the other way around. There is no snow because it has been so "hot". That's not good for the permafrost
« Last Edit: October 21, 2022, 08:00:10 AM by El Cid »

FredBear

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #7 on: October 21, 2022, 12:14:17 PM »
Less snow on the ground means less insulation so more heat loss and more “cold” stored in the ground. Good for the permafrost.

I think it is the other way around. There is no snow because it has been so "hot". That's not good for the permafrost

At this stage in the season "no snow" is dumping heat, getting back towards to the normal situation.
The problems have been early "snow off" and abnormally high temperatures during the past NH summer?
The next questions are whether enough heat can be dumped to get back to the old situation or even if the snows fail this winter and excessive heat losses cause more extreme temperature oscillations later    .     .     .    ???

HapHazard

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #8 on: October 21, 2022, 09:29:10 PM »
Good for permafrost right now (so long as the temps are below freezing) - but not if it ends up being a negative snow cover anomaly come spring melt season.
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Tor Bejnar

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #9 on: October 22, 2022, 04:03:04 AM »
Absolutely, Hap!
Arctic ice is healthy for children and other living things because "we cannot negotiate with the melting point of ice"

Sebastian Jones

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #10 on: October 22, 2022, 05:04:18 AM »
Good for permafrost right now (so long as the temps are below freezing) - but not if it ends up being a negative snow cover anomaly come spring melt season.
I live in the NW of Canada, about where the negative and positive anomalies meet.
We do have a little snow on the ground, but here and to our south, it has been record warm.
It is decidedly not god for permafrost in this country.
Neither is is to our east in the NWT where a wetlands research station recently burned to the ground in a wild land fire...in a wetland ...in October.https://cklbradio.com/2022/10/18/breaking-scotty-creek-research-near-fort-simpson-camp-damaged-by-fire/

Tor Bejnar

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #11 on: October 22, 2022, 06:23:47 AM »
Are you saying it’s not freezing cold at night in late October in northern Canada?  Unseasonable yes,  but we had ground frost in northern Florida yesterday morning. OK,  my computer says Whitehorse YT is hovering around 0C this week and will average below 0 next week.
Arctic ice is healthy for children and other living things because "we cannot negotiate with the melting point of ice"

Ranman99

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #12 on: October 22, 2022, 12:06:42 PM »
Just because it is below zero in Northern Florida does not mean it will be below zero in Yellowknife. Check out the complete weather systems over North America, highs and lows, including the jet stream and the current polar vortex excitement.

When you drive from Toronto to Ottawa in autumn, you often meet a very nice invisible barrier about 60km to the West of Ottawa, where the weather pattern is coming down from Hudson's Bay and temps drop about 6 degrees celsius in a 15km stretch, and the difference is startling. Sometimes it is there, sometimes it is not, but it is very noticeable and just one of those things ;-)

When it is reverse the temperature change can be in the positive direction but usually around that same place.  :-*
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #13 on: November 19, 2022, 12:30:47 AM »
From Nico Sun @ https://cryospherecomputing.com/

"The North wind doth blow, and we will have snow"

Snow anomaly + 4.34 million m2, (which is a lot)
Of which
North America + 2.96 million m2, (just breached +2SD)
Asia 1.51 million m2,
Europe - 0.13 million m2.

click to enlarge images
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The Walrus

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #14 on: November 19, 2022, 03:42:45 AM »
Just wait until the current snowstorm wraps up and see where we stand.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #15 on: November 21, 2022, 06:42:56 PM »
Yesterday the snowcover anomaly rose to just above +5 million km2 - but it was all to do with Europe.

Today (from Nico Sun @ https://cryospherecomputing.com/) the snowcover anomaly has reduced to 4.51 million km2;
- The Europe anomaly has increased to + 1.06 million km2,
- The Asian anomaly has reduced to + 0.96 million km2,
- and the N. America anomaly has reduced to + 2.49 million km2, which is a real reduction in snowcover area.

Although the Lake-effect snow was a real blinder, the area affected was realtively snall, given that the current N. America anomaly of 2.49 million km2 is somewhat more than 25% of the total land area of the Lower 48 US States (perhaps 15% of the total land area of North America.

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #16 on: November 28, 2022, 10:53:37 PM »
Just one week ago the Northern Hemisphere snow cover anomaly was around +5 million km2, (of which in N. America was around +2.5 million.

And now?...

N. America    -O.49 million km2 (yes, minus)
Asia              +0.28 million km2
Europe          +0.07 million km2

TOTAL            -0.13 million km2 (yes, minus)

Of course this caould all change very fast very soon. I wonder if the cold blast hitting N America over the next few days will be of dry or wet air.

Data & graphs from Nico Sun @ https://cryospherecomputing.com/

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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oren

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #17 on: November 29, 2022, 01:02:38 AM »
Very weird.

kassy

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #18 on: November 29, 2022, 10:56:59 AM »
Well YOY there is more energy in the system and now it´s enough to melt snow at the edges even this late in the year. We will see how this develops over time.
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #19 on: December 22, 2022, 07:19:59 PM »
Here are Nico Sun's graphs on snowcover from https://cryospherecomputing.com/

Of interest might be the USA snowcover anomaly of +0.59 million km2, being just before the predicted major storm blights much of the USA. The data in a couple of days time might be interesting as well as any thaw after that.

Overall, Northern Hemisphere snowcover is as near to the 2000to2019 average as makes no difference.
"Para a Causa do Povo a Luta Continua!"
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The Walrus

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #20 on: December 22, 2022, 08:00:30 PM »
With the forecasted Arctic blast, I doubt there will be much thaw in the aftermath of the storm.

HapHazard

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #21 on: December 22, 2022, 10:26:51 PM »
The data in a couple of days time might be interesting as well as any thaw after that.

Yeah, might be a bit of a roller coaster. It's -26 here now, got down to -34 last night. Forecast says +3 on Saturday, staying pretty level for the week after that. Our livestock will be very confused. haha

Thanks for all the work you post on this site, BTW. Happy ho-ho!
If I call you out but go no further, the reason is Brandolini's law.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #22 on: December 24, 2022, 07:23:43 PM »
While the snow cover grows in the USA (with more to come) snowcover declines a lot in Europe and Asia, the result being a small -ve snowcover anomaly.
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #23 on: December 26, 2022, 04:16:17 PM »
On this day with the worst of the storm over snowcover in America starts to thaw along its Southerm border.

In Europe snow cover losses remain high, while Asia is a mixture of increases and decreases.

click images to enlarge (thanks to Nico Sun as usual)
"Para a Causa do Povo a Luta Continua!"
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The Walrus

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #24 on: December 26, 2022, 04:48:05 PM »
All in all, relatively normal.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #25 on: December 27, 2022, 05:27:45 PM »
On this day with the worst of the storm over snowcover in America thaw increasesalong its Southerm border.

In Europe snow cover losses continue high, while Asia remains a mixture of increases and decreases.

Overall snowcover is 0.76 million km2 below the 2000-19 average.

GFS images suggest thaw in the middle and East of North America could speed up considerably this week

click images to enlarge (thanks to Nico Sun as usual)
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #26 on: December 29, 2022, 03:54:13 PM »
On this day with the worst of the storm over snowcover in America thaw accelerates along its Southerm border.

In Europe snow cover losses have stopped, while Asia snowcover has started to increase.

Overall snowcover is 1.19 million km2 below the 2000-19 average.

GFS images suggest thaw in the middle and East of North America is likely to be high over the next few days, with periods of above zero temperatures reaching as far North as southern Hudson Bay.

click images to enlarge
« Last Edit: December 29, 2022, 04:07:06 PM by gerontocrat »
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #27 on: December 30, 2022, 02:59:22 PM »
On this day with the recent storm over snowcover in America thaw continues to accelerate along its Southerm border (but more snowcover further West)

In Europe& Asia has started to increase.

Overall snowcover is 1.85 million km2 below the 2000-19 average, America a 0.06 million km2 abiove aveerage.

GFS images suggest thaw in the middle and East of North America is likely to continue to be high over the next few days, with periods of above zero temperatures reaching as far North as southern Hudson Bay.

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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The Walrus

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #28 on: December 31, 2022, 02:49:20 AM »
Another major snowstorm spreading across North America.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #29 on: December 31, 2022, 02:49:44 PM »
Another major snowstorm spreading across North America.
But not yet.

On this day in the storm aftermath in America the thaw continues to be high along its Southerm border.

On this day in Europe & Asia snowcover has decreased a little bit.

Overall snowcover is 2.47 million km2 below the 2000-19 average, snowcover in America is 0.25 million km2 below average.

GFS images suggest thaw in the middle and East of North America is likely to continue for a few days more, with periods of above zero temperatures reaching as far North as southern Hudson Bay.

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
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The Walrus

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #30 on: December 31, 2022, 07:55:22 PM »
Another major snowstorm spreading across North America.
But not yet.

On this day in the storm aftermath in America the thaw continues to be high along its Southerm border.


That is typical along the southern front.  The freeze/thaw cycle will continue throughout the winter months.  This has occurred several times already in North America, as shown in your graphs.  While October was mostly below average, November and December have been above, but has not broken out above or below the two standard deviation range.

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #31 on: January 05, 2023, 05:20:18 PM »
Data as at 5 Jan from Nico Sun @ https://cryospherecomputing.com/


On this day in The USA & Asia snowcover has increased a bit but still below average (2000-2019).

The story moves to Europe, where snowcover has fallen below the -2SD boundary, some 2.37 million km2 below average.

Overall snowcover is 4.07 million km2 below the 2000-19 average.

click images to enlarge[/i]
[/quote]
"Para a Causa do Povo a Luta Continua!"
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Stephan

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #32 on: January 08, 2023, 09:56:30 AM »
You may have heard that the Alps miss a lot of snow this winter.
I add a series of pictures from a webcam in Western Austria (Furkajoch, roughly 50 km SE of Lake of Constance) from 2017 to 2023, each taken early January. The webcam is located at 1.630 m above sea level. The mountain to the left is 2.000 m asl, the mountain to the right close to 1.800 m.
The snow cover (if you can speak about a snow cover at all) is at historical lows. Skiing requires areas well above 1.900 m or artificial snow (white stripes in-between a green klandscape).
See attached picture, click to enlarge it.

Webcam address: https://www.foto-webcam.eu/webcam/furkajoch/
From this webcam you can easily select other ones in that area.
It is too late just to be concerned about Climate Change

gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #33 on: January 16, 2023, 02:32:14 PM »
Data as at 16 Jan from Nico Sun @ https://cryospherecomputing.com/

On this day in The USA & Europe snowcover has decreased and is  below the 2000-2019 average (well below average in Europe).

The story moves to Asia, where snowfall has sudenly been big, huge even. Snowcover is way way above the+2SD boundary,

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #34 on: February 23, 2023, 04:40:19 PM »
It has been a while since I posted Nico Sun's graphs from https://cryospherecomputing.com/

Snowcover in Asia, America & espcially Europe are all below the 2000-2019 average, in total less by 1.65 million km2 (4%) of the average 41.6 million. 1.65 million km2 is a lot, but not much in % terms.

click images to enlarge

"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #35 on: March 05, 2023, 03:06:40 PM »
The snowcover extent is now well past the maximum, with recent strong melt in Asia and Europe bringing overall snowcover to 1.00 million km2 (2.5%) below the 2000-2019 average.

However, the after-effects of the major SSW could cause big changes for the remainder of March (see https://forum.arctic-sea-ice.net/index.php/topic,3863.msg361071.html#msg361071 and the last image), with strong melt in regions with well above averages, zero melt in cold regions, and major storms and snowfall along the boundary between hot and cold regions.

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #36 on: March 08, 2023, 03:08:28 PM »
The snowcover extent is now well past the maximum, with the continuing strong melt in Asia bringing overall snowcover to 1.59 million km2 (4.0%) below the 2000-2019 average.

Temperature anomalies in Northern Asia support a contnuing fast drop in Asian snowcover.

click images to enlarge
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #37 on: March 28, 2023, 06:30:18 PM »
Dats from https://cryospherecomputing.com/

America snowcover 1.36 million km2 above the 2000-2019 average
Asia snowcover 1.03 million km2 below the 200-2019 average
Europe snowcover 0.64 million km2 below the 2000-20019 average

Total snowcover 0.32 million km2 below the 2000-20019 average, less than 1% below we the average of 35.82 million km2.

America still recovering from the series of storms this month.
« Last Edit: March 28, 2023, 11:43:14 PM by gerontocrat »
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #38 on: April 02, 2023, 04:29:03 PM »
Data from https://cryospherecomputing.com/

America snowcover 1.75 million km2 above the 2000-2019 average, just breaching the +2SD boundary (= Spring is late this year?)
while Asia snowcover at 1.25 million km2 below the 2000-2019 average almost below the -SD boundary
and Europe snowcover almost exactly average at 0.04 million km2 below the 2000-20019 average

Total snowcover 0.35 million km2 below the 2000-20019 average, 1% below the average of 34.72 million km2.

America still recovering from the series of storms this month and getting new storms, or are they over now?
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #39 on: April 30, 2023, 07:01:58 PM »
Scientists Reveal How Reduced Sea Ice In the Barents–Kara Seas Can Increase Snow Cover In Eurasia
https://phys.org/news/2023-04-scientists-reveal-sea-ice-barentskara.html

Recent research has revealed how the sea ice in the Barents–Kara seas in November was an important factor affecting the distribution and interannual variability of snow-cover extent in Eurasia from November to January (winter) during 1979 to 2021.

Specifically, a research team from the Northwest Institute of Eco-Environment and Resources at the Chinese Academy of Sciences used reanalysis data to analyze the atmospheric circulation and moisture transport in winter in relation to reduced sea ice.

The team found that changes in the circulation in both the troposphere and stratosphere induced a southward breakout of cold air in the Arctic, causing extreme wintertime cooling over Eurasia. Furthermore, two prominent cyclonic anomalies near Europe and Lake Baikal affected the moisture transport and its convergence.

Further analysis revealed that the effects of moisture advection and wind divergence influenced the water vapor budget, thereby affecting precipitation. As a result, snow cover increased in much of Europe, Central Asia, and East Asia under the necessary conditions of both water vapor transport and temperature. The results were evaluated in version 5 of the Community Atmosphere Model.

Qian Yang et al, Impact of the Shrinkage of Arctic Sea Ice on Eurasian Snow Cover Changes in 1979–2021, Advances in Atmospheric Sciences (2023).
https://link.springer.com/article/10.1007/s00376-023-2272-x

https://static-content.springer.com/esm/art%3A10.1007%2Fs00376-023-2272-x/MediaObjects/376_2023_2272_MOESM1_ESM.pdf
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #40 on: May 01, 2023, 02:55:04 PM »
April 2023 was very cold in Alaska.  Weather stations near Anchorage and Fairbanks show that the melting of the snowpack is late compared to recent years.  See regular updates from Rick Thoman:

https://mastodon.social/@AlaskaWx/110289524384648919
https://mastodon.social/@AlaskaWx/110288591271732090
https://mastodon.social/@AlaskaWx/110266394952060200

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #41 on: May 01, 2023, 05:35:37 PM »
Data from https://cryospherecomputing.com/ as at 30 April 2023

North America snowcover is 0.21 million km2 above the 2000-2019 average, with +ve anomalies mostly in the West and South of Hudson Bay.
Asia snowcover is 0.65 million km2 above the 2000-2019.
Europe snowcover is almost exactly average at 0.03 million km2 above the 2000-20019 average

Total snowcover 0.90 million km2 above the 2000-20019 average, 3.6% above the average of 24.97 million km2.

While there have been very significant local events - e.g. extremely high California snow pack, the overall picture is of a fairly average snow year with melt now in full swing.
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #42 on: May 01, 2023, 06:30:57 PM »
Will average snowfall lead to average melt and average sea ice?

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #43 on: May 01, 2023, 08:35:32 PM »
Will average snowfall lead to average melt and average sea ice?
Snow cover not snowfall
Snow cover measures area coverage.
Snowfall measures volume.

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #44 on: May 01, 2023, 09:38:11 PM »
Canada will have positive temperature anomalies for at least the next 7 days, according to both GFS and ECMWF forecasts.  Expect the snowpack to take a hit there.  On the other hand, much of Siberia and Alaska will be on the cool side.

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #45 on: May 06, 2023, 10:36:15 PM »
Data from https://cryospherecomputing.com/ as at 5 May 2023.

North America snowcover is 0.05 million km2 above the 2000-2019 average, with +ve anomalies still mostly in the West and South of Hudson Bay. But it is melting quickly - see below

Asia snowcover is 1.26 million km2 above the 2000-2019 average after net increase in snowcover in the last few days.

Europe snowcover is almost exactly average at 0.01 million km2 above the 2000-20019 average

Total snowcover 1.33 million km2 above the 2000-20019 average, 5.6% above the average of 23.30 million km2. While there have been very significant local events - e.g. extremely high California snow pack, the overall picture is still of a fairly average snow year with melt now in full swing.

North America
Fire in Alberta and floods in British Columbia. Also look at What's New in the Arctic

The heat persists in Canada for at least the next 10 days.
And after a week the chill in Western USA becomes heat - maximum temperatures forecast for California, Oregon and Washinhton State are extreme. The California snow pack could be in for a very big sudden melt  See last image

https://www.theguardian.com/world/2023/may/05/canada-wildfires-thousands-evacuate-fox-lake-fire
Thousands forced to evacuate as wildfires ravage western Canada
More than 13,000 people were ordered to leave Alberta as 78 fires burned, and officials say the blazes are expected to intensify
Quote
A week of record hot weather in western Canada has forced thousands of people to evacuate their homes, as wildfires raged in parts of Alberta and rapid snow melt triggered flooding across interior British Columbia.

By Friday, more than 13,000 people were under evacuation orders in Alberta, as 78 fires burned. Among the worst-hit areas was the Little Red River Cree Nation in the north of the province, where the 1,458-hectare Fox Lake fire consumed 20 homes and the police station.

The entire 7,000-strong population of Drayton Valley, 140km (87 miles) west of the provincial capital Edmonton, was also ordered to evacuate late on Thursday night.

There have been 348 wildfires in Alberta this year and more than 25,000 hectares (62,000 acres) burned, said Christie Tucker, an information unit manager for Alberta Wildfire.

“This is significantly more wildfire activity for this time of year than we have seen any time in the recent past,” Tucker told a press conference, adding fires were expected to intensify on Friday.

“It’s going to get hotter, it’s going to get windier and we are expecting some extreme wildfire behaviour. Firefighters are at the ready today for what could be an extremely challenging day,” she said.

In British Columbia, rivers burst their banks, washing through homes and forcing highway closures in numerous communities across the southern interior, including Cache Creek and Grand Forks.

Until last week western Canada had been enduring a cold spring but the rapid onset of unseasonably high temperatures, in places 10-15C above the average for early May, is causing fires and flooding.

In British Columbia, the flooding is expected to worsen over the weekend with heavy rain forecast across the south of the province.

“Peak river levels are expected on Saturday through Monday,” British Columbia’s River Forecast Centre said in a flood warning issued late on Thursday.
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #46 on: May 09, 2023, 11:41:45 PM »
Data from https://cryospherecomputing.com/ as at 8 May 2023.

North America snowcover is 077 million km2 below the 2000-2019 average, with +ve anomalies still mostly in the West and South of Hudson Bay. But it is melting quickly - see below

Asia snowcover is 1.16 million km2 above the 2000-2019 average after net decrease in snowcover in the last few days.

Europe snowcover is close to average at 0.18 million km2 above the 2000-20019 average

Total snowcover 0.57 million km2 above the 2000-20019 average, 2.7% above the average of 21.49 million km2. While there have been very significant local events - e.g. extremely high California snow pack, the overall picture is still of a fairly average snow year with melt now in full swing.

The heat persists in Canada for at least the next week and maybe longer.
And by the weekend the chill in Western USA becomes heat - maximum temperatures forecast for California, Oregon and Washinhton State are extreme. The California snow pack could be in for a very big sudden melt.
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #47 on: May 12, 2023, 08:50:41 PM »
Data from https://cryospherecomputing.com/ as at 12 May 2023.

North America snowcover is 1.13 million km2 below the 2000-2019 average, with +ve anomalies still mostly in the West and South of Hudson Bay. But it is melting quickly - see below

Asia snowcover is 1.06 million km2 above the 2000-2019 average.

Europe snowcover is close to average at 0.05 million km2 above the 2000-20019 average

Total snowcover 0.02 million km2 above the 2000-20019 average, 0.1% above the average of 19.63 million km2. Melt continues in full swing.

The heat persists in Canada for at least the next week and maybe longer.
And by the weekend the chill in Western USA becomes heat - maximum temperatures forecast for California, Oregon and Washinhton State are extreme. The California snow pack could be in for a very big sudden and then prolonged melt.
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gerontocrat

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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #48 on: May 19, 2023, 11:14:44 PM »
Data from https://cryospherecomputing.com/ as at 12 May 2023.

North America snowcover is 1.73 million km2 below the 2000-2019 average and is well below the -2SD boundary, with +ve anomalies confined to the West, .

Asia snowcover is 0.80 million km2 above the 2000-2019 average but melt is accelerating strongly.

Europe snowcover is close to average at 0.09 million km2 below the 2000-20019 average and is declining at a close to average rate.

Total snowcover is 1.02 million km2 below the 2000-20019 average, 6% below the average of 16.24 million km2. Melt continues in full swing and may result in an early full melt.
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Re: Northern Hemisphere Winter 2022-2023 Snowcover / Misc Obs
« Reply #49 on: May 24, 2023, 04:09:10 PM »
The snowmelt story switches more to Asia nd Europe.

Overall snowcover now 11% less than the 2000-2019 average - which is a high percentage.
"Para a Causa do Povo a Luta Continua!"
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