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Author Topic: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs  (Read 3566 times)

Niall Dollard

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Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« on: August 31, 2023, 08:58:58 PM »
Might as well kick off the thread for this season.

Eastern coast of Baffin had a recent fall, right down to the coastline.

Not particularly unusual going by its climatology.

Makes for a small little upward bump on Nico Sun's snow extent chart (red line is America).
« Last Edit: August 31, 2023, 09:04:39 PM by Niall Dollard »

gerontocrat

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #1 on: October 15, 2023, 08:11:43 PM »
Snowcover well below average in Asia & North America, though now quickly rising in Asia
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #2 on: October 30, 2023, 02:49:48 PM »
It is snowing....
"Para a Causa do Povo a Luta Continua!"
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Niall Dollard

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #3 on: November 07, 2023, 12:22:55 AM »
Overall October was poor for snow over most parts of USA and Canada (combined).

Nice chart here from Brian Brettschneider showing that it was the least snowy over the past 84 years. Particularly so over the latitudes between 50N and 60 N.

Some parts however were very snowy. Banks Island and eastern Beaufort saw their snowiest October.

This coincides very closely with the anomalously warm area on the NSIDC 925hPa temperature chart stretching over the western CAA.

Warmer air temperatures and open (non-frozen) Beaufort Sea all contributing to a snowy October there.

RoxTheGeologist

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #4 on: November 07, 2023, 04:48:09 PM »

Warm it up and then throw a blanket over it when the sun isn't shining - seems like a great way to lose permafrost.

morganism

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #5 on: November 26, 2023, 10:15:41 PM »
(weatherwest/swain has a new post up. Good news for west coast US, bad news for that 50-60n band discussed above. AK may stay well above avg for snow cover. Siberia?)

Warm Thanksgiving ridge pattern will likely transition toward progressively wetter pattern around early Dec

(...)
A combination of MJO-related subseasonal forcing and strong El Nino-related seasonal forcing will likely cause the storm track over the North Pacific to increasingly favor California after an episode of strong/dry ridging over the next 7-10 days.

There are, however, growing signs of a larger scale and likely more sustained transition toward a wetter, more active pattern by early to mid December. Long-range traditional weather ensembles are suggesting that this trend will first begin to emerge around 10 days from now, and subseasonal ensembles are currently suggesting a continued escalation of this wetter pattern through December as the broader setup becomes increasingly favorable for the “storm door” to open on a more consistent basis.

In the short term, this possible emergence of a wetter pattern may be partly linked to the eastward progression of an active Madden-Julian Oscillation (MJO) cycle that has the potential to “jump start” the transition. But as we head later into December and into January, I’d expect the seasonal-scale influence of an already quite strong and still strengthening El Niño event to emerge more strongly and to potentially become a major influence on California hydroclimate for most of the rest of the winter.

As I’ve noted many times in the past: when there is a substantial El Niño (EN) event, the atmospheric and oceanic “base state” usually doesn’t reach a point favorable for the Rossby wave perturbations generated by displaced tropical thunderstorm activity (deep convection) to substantially or consistently alter the jet stream over the North Pacific until mid-winter–usually late Dec or Jan. This is why there’s a pretty weak correlation between even strong EN events and autumn precipitation across most of California–it’s just too early in the season. But this year, it looks like subseasonal forcing (from the MJO) will potentially accelerate that process just prior to the time of year when EN-related seasonal influences might be getting their act together.

What does all of this mean, in practical terms? As always, both the MJO and EN offer a tilt in the odds toward certain outcomes rather than a guarantee of any particular conditions in California. But at this time, it does seem that things are lining up for the pattern to become progressively more active and wetter in California starting around early to mid December–and seasonal predictions continue to hint at a relatively high likelihood of wetter than average conditions then persisting through the rest of winter for at least central and southern CA, and perhaps parts of NorCal as well.


Eastern tropical Pacific approaches “Super El Niño ” territory as warming continues
(more)

https://weatherwest.com/archives/33007


edit: Was a huge snow event in Siberia 4 days ago, but since the Siberian Times hasn't updated/published anything since Covid19 innoculations there in 2020, there is very little news coming out of the area. Was more fires there in 2021/22 than in all the rest of the world combined. No info if still zombie tundra in 2023, but we have seen lots of the fire observation drones, and some of the fire airplanes used in the mil operation in UA.
« Last Edit: November 26, 2023, 10:30:19 PM by morganism »

morganism

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #6 on: December 15, 2023, 07:46:31 AM »
(ddn't see this posted elsewhere, but the vegetation index around Hudson Bay is intriguing. Is possibly slowing re-freeze there?)

2023 Arctic Report Card: image highlights

https://www.climate.gov/news-features/understanding-climate/2023-arctic-report-card-image-highlights

(...)
The annual Arctic Report Card, now in its 18th year, is the work of 82 authors from 13 countries. It includes a section titled Vital Signs, that updates eight measures of physical and biological changes, four chapters on emerging issues and a special report on the 2023 summer of extreme wildfires. Below are some image-based highlights from this year's report.


https://arctic.noaa.gov/report-card/
« Last Edit: December 15, 2023, 07:59:52 AM by morganism »

grixm

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #7 on: December 25, 2023, 09:29:24 AM »
Snow cover in North America is extremely low. Record for this date?

kassy

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #8 on: December 25, 2023, 10:12:44 PM »
There does not seem to be that much in Siberia either.
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HapHazard

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #9 on: December 25, 2023, 10:21:30 PM »
Barely a dusting here (middle of BC, 1200m alt., very rural area). Been living here for over a dozen years now, never seen less than 2 feet on the ground by xmas. It's been dry & mild.
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John_the_Younger

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #10 on: December 26, 2023, 02:07:20 AM »
Your reports got me to look outside and, low and behold, there is no snow on the ground outside here in North Florida either.  But I did see some white camellia blossoms, and once they fall, there will be Florida snowballs to toss at each other.

Comradez

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #11 on: December 31, 2023, 03:05:36 PM »
2023 ends the year with an astounding negative snowcover anomaly in the northern hemisphere. -5.056 million km^2 as of 12/31/2023 according to cryospherecomputing.com.  I don't think I have ever seen the snow anomaly breach the -5 million km^2 level before.  Of course, snow comes and goes quickly.  Still strange, though.

Jim Hunt

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #12 on: January 01, 2024, 03:24:28 PM »
Still strange, though.

Hottest year evah*!

(* In the satellite era)

N.B. For additional context see also:

https://forum.arctic-sea-ice.net/index.php/topic,578.msg390972.html#msg390972
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be cause

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be cause

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #14 on: January 16, 2024, 01:09:01 AM »
yet ...

https://nrt.cryospherecomputing.com/Snow_Cover_Data/NOAA_Snowmap_anomaly.png

  .. the NH multi-million km snow shortage has been buried in the white stuff
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gerontocrat

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #15 on: January 26, 2024, 03:55:22 PM »
Snowcover extent pretty much at maximum, and after all the ups and downs ends up almost dead on average.

BUT, I wonder what the Snow mass (water equivalent) is and how quickly the snow will melt.
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Sublime_Rime

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #16 on: January 26, 2024, 08:43:11 PM »
Interesting, I can attest that it is highly overcounting the cover in the northeast US. I live up in Albany, NY and we have had no snow-cover for at least 2 days, not to mention down in NJ where they barely had snow sticking at any point (parents live there).
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gerontocrat

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #17 on: January 29, 2024, 03:23:09 PM »
The chances of an early fast snowmelt increased over the last couple of days....
"Para a Causa do Povo a Luta Continua!"
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grixm

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #18 on: February 04, 2024, 09:09:35 PM »
Very low North America snow cover for the date.

HapHazard

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #19 on: February 04, 2024, 10:04:56 PM »
Anecdotal: I'm in central BC, rural, altitude roughly 1300m. Every winter here thus far for the last dozen-ish years, the snow has been up to my knees by now.

Currently, I'm wondering if I should go mow the lawn.
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John_the_Younger

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Re: Northern Hemisphere Winter 2023-2024 Snowcover / Misc Obs
« Reply #20 on: February 04, 2024, 11:17:35 PM »
I understand Canadians routinely mow their lawns when there is less than 10 cm of snow.  It was a Québécois (Arthur Sicard) who invented the snowblower; obviously he was watching his neighbors.
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