Spring 2020 Discussion Weather Thread (Northern Hemisphere) (snow, warm, ice, averages)

[dontbelievehim]

High/lows 85f/52f low 27f dewpoint Fresno, ca

We might get two upper 90s temps during the heatwave. I'll trade ya, I wouldn't mind some cold weather right now, it's been months edit: yeah, I changed my mind on the cold, I could handle two days of it.

[Ed's Mountain]

Check this out. Ice dam on the Athabasca River causes flood which then allows huge blocks of ice to get dropped onto the nearby golf course. Could be a while before this stuff melts.




Source: https://www.cbc.ca/news/canada/edmon...lood-1.5555285

[The Grandeur]

Lowest temperatures in the district municipalities of Ardahan Province today:


Göle: 1.6°C

Hanak: 2.9°C

Damal: 3°C

Provincial Capital of Ardahan: 3.3°C

Çıldır: 5.3°C

Posof: 5.8°C

[Noodleman556]

5:30pm radar, strong but thin band of showers which signals the arrival of tonights front.

Highest gusts for all perth region stations have come since 4pm. Notable stations are swanbourne 80km/h, rottnest 98km/h, Jandakot 76km/h, mandurah 89km/h

[Noodleman556]

5:30pm: 20.5C with a dew of 13.7C. Winds NNW 43km/h (27mph) gusting 57km/h. (35mph)

5:50pm: 16.5C with a dew of 15.9C. Winds WNW 52km/h (32mph) gusting 63km/h. (39mph)

6:00pm: 16.6C with a dew of 15.8C. Winds WNW 54km/h (34mph) gusting 80km/h. (50mph)

Front moved through around 5:35pm with a few minutes of very strong gusts (i'd estimate in the 70-75km/h range, 76km/h was recorded at jandakot at 5:46pm) and 2-3 minutes of rain that fell in heavy sheets; awesome frontal weather. The rest of the night be stay as windy or possibly even slightly windier than now, showers will continue to pass through (particularly in the south of perth) overnight. Expected to pick up 3-5mm more. At 5:50pm Ocean Reef was sustaining 70km/h and gusting 78km/h.

We've had 3mm from 5:30-6:00pm.

[Cambium]

Originally Posted by Cambium

I'll keep this updated with what the Euro model shows as far as the airmass at 5000' next weekend over NYC. 8 days away.

Here is the Latest 00z & 12z from May 2, 2020.

00z has -8.1°C, 12z has a -9.9°C.
(Normal is +7C). record extreme cold for May is -7C.

Originally Posted by Cambium

00z Update. Euro has -8.3°C over NYC Sunday morning next week. 7 days away. That would tie the record cold 850mb temp for month of May

Originally Posted by Cambium

New 12z update: Euro gets colder vs previous run with a -9.8°C airmassSunday morning.
(14°F at 5,000'...in May. #Record)

Originally Posted by Cambium

00z Update. Euro has -8.8°C airmass Saturday morning and -8.3°C Sunday morning now. 5-6 Days away.
Also has some precip around the region with the trough swinging in and Upper Low overhead..

Originally Posted by Cambium

12z Euro model update continues the cold blast. -9.2°C Saturday morning over NYC and -8.2° Sunday morning. And has a coastal storm with the swinging trough with a below freezing airmass.

00z Euro update 5/5/20. 4-5 Days away now.


Slight changes at mid level. Still record cold airmass with -8.6°C Saturday morning and -8.4° Sunday morning but at 2am not 8am and a brief warmup up above freezing Monday morning. Back below until Mid Week. Wet Snow showers Sat evening?

[Cambium]

NWS Discussion for NYC area.::: Winter Like "Setup" in May

National Weather Service New York NY
646 AM EDT Tue May 5 2020

WEDNESDAY NIGHT THROUGH MONDAY/...
Active and cool period coming up, as a continuing parade of
mostly Pacific disturbances every couple of days brings
unsettled weather, interacting with a stronger northern stream
cutoff low to carve out a fairly deep trough over the East,
while a weaker longwave ridge persists near the West Coast. For
the local area this means rain arriving on Wed and continuing
into Wed night/Thu morning, then another rain event Fri into Fri
night, with enough cold air behind each that higher elevations
NW of NYC could see a rain/snow mix as each of these systems
pulls out.

Another chance of rain/snow showers may come on Sat as the
aforementioned northern stream trough dives into New England,
via combo of dry low level air and steep lapse rates via cold
air aloft.

Winds will also be quite brisk on Sat in the wake of the
departing sfc low, ushering in cold air with high temps this
weekend mainly in the 50s, and lows Sat night in the 30s to
lower 40s.

NWS Albany.....

National Weather Service Albany NY
631 AM EDT Tue May 5 2020


.LONG TERM /FRIDAY THROUGH MONDAY/...
Very unusual winter like upper pattern still expected through the
period. Still a strong run to run consensus from sources of
guidance/ensembles for potential wintry weather, not only for higher
elevations but potentially into the valleys as well.

Strong upper closed low drops out of Canada and the Great lakes
Friday night, tracking east through Saturday and exiting New England
Saturday night into Sunday. Very cold airmass along with strong
upper dynamics and low level forcing will support rain changing to
snow in higher elevations Friday evening and a better than average
chance for a change to snow late Friday night and early Saturday
morning in the Valleys, including the Capital Region and areas along
the Mohawk Valley to Berkshires and points north.

Too early to know the details about the overlap of the most intense
precipitation and the cold air to determine how much if any snow
could get into the valleys. If the heaviest precipitation is timed
for early Friday evening or daytime Saturday when there is some
solar radiation influence on temperatures, instead of late night
Friday night during the diurnally coolest part of the day, then snow
potential would be minimized in the valleys.

There is enough uncertainty on the timing and placement of the zone
where the heaviest precipitation will occur to hold off committing
to a shovelable or plowable snow in valleys but light accumulations
are increasingly possible. In higher elevations, considerable
accumulations are likely, again, wherever the zone of heaviest
precipitation ultimately sets up. Lows Friday night in the lower to
mid 30s but 20s higher terrain. Highs Saturday in the 40s but 30s
higher terrain with lingering shower and snow shower activity ending
Saturday night.

Dry weather potential Sunday, depending on the timing of a trailing
upper impulse, timed for late Sunday night and Monday but the timing
could change. Highs Sunday in the upper 40s to lower 50s but around
40 higher terrain.

There are some increasing signals for a trailing weak upper
disturbance to track through the upper cyclonic flow with another
change for light rain or snow late Sunday night into early Monday.
Precipitation type will once again be elevation dependent and time
of day dependent. Lows Sunday night around 30 to mid 30s. Highs
Monday around 50 to mid 50s but lower 40s higher terrain

[LKJ1988]

69f here.

[chicagogeorge]

Just awful


https://twitter.com/NWSChicago/statu...04520147693569


Hoping for a pattern change mid month

https://twitter.com/Skilling/status/1257506658974138369

[itsbbnomoney]

Absolute trash Today the weather is rather cool, around 14-15C/58F and cloudy. Maybe we will hit 18C/64F tomorrow, but after that its all downhill. Arctic blast is coming on Monday to my area. I can deal with it for a week or so, but right now even the end of May is uncertain, if we get unlucky the patter is going to lock for even longer, potentially ruining June too. (and knowing my luck ofc its going to be a super small trough of low pressure just above Estonia, while western europe is gonna get summer...)

I'm seriously gonna start a pattern change prayer circle lol