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NNE Cold Season Thread 2020-2021


wxeyeNH
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13 minutes ago, tamarack said:

That was a frequent phenomenon during the first warm and sunny days after the equinox when I was in the woods.  The breeze would bring a blob of air from open hardwoods and it would be nice and warm, then the next blob would come from under the black growth and be very noticeably cooler.  Late morning thru mid afternoon would have that back and forth, sometimes only seconds apart.

Temp was upper 30s at 10 last evening and upper 40s at 5:30 this morning.  Down 3-4° since then with some strong gusts.  High of 54 yesterday tied 12/25 for mildest since 12/1.

Yup...dewpoints are low so you get these mini cold domes building in heavily forested areas where the wind can’t mix down. The melting and evaporational cooling really helps sustain that cold supply. I get it here in the afternoon from the back woods to my west. I can walk out a bit into the woods and feel the “front” hit me. In the evening it’s a continual battle on my Davis with the temp jumping sometimes 5F in a minute depending on if the wind lets up and the cold air oozes in or if we get a period of 5-10mph+ and mix it out. 

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5 minutes ago, alex said:

Low of 41 but walkway and puddles are freezing up. Bizarre. Stake down to 13”

Must be the drop in rh that allows that to happen.  The path to compost was slush yesterday and despite temp U-30s and 40s since then, it's solid (and slippery) ice this morning. 

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28 minutes ago, powderfreak said:

Some upslope refresh coming? Two different waves could bring some appreciable QPF.  GFS not biting but EURO/GGEM/NAM seem decent.

EURO

ecmwf-deterministic-vt-total_precip_inch-5770000.thumb.png.59d66c05f2c24682f5c4b9616d577d34.png

GGEM

gem-all-vt-total_precip_inch-5766400.thumb.png.84460c60b1d753faf90105a8202c6d83.png

Yeah, those events are both shown on just about every model, and I’ve added some of the related BTV NWS discussion below.  It looks like we’ll get back to a bit more March reality for a while, with some additional snow potential shown into next week as well.  Unfortunately, after a full thaw-freeze cycle like this recent one, it takes a good shot of L.E. for a decent resurfacing, or else you’re still stuck in that winter/spring hybrid period with only hard surfaces to show for it.  But something in the 4-6” range will typically set up low angle stuff for nice turns depending on the snow density.

Bread&Butter.jpg

Area Forecast Discussion

National Weather Service Burlington VT

654 AM EST Fri Mar 12 2021

 

.NEAR TERM /THROUGH SATURDAY/...

As of 649 AM EST Friday...Mostly sunny conditions across the North Country will persist until secondary front approaches from sern Ontario late in the afternoon into the evening hours. Remainder of the forecast is on track, including potential for snow showers and embedded snow squalls 00-03Z this evening.

 

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...

As of 333 AM EST Friday...Transitioning into Saturday night, we will see a cold front sweep southeastwards across the region as a lobe of vorticity advects across the region. Good low-level convergence along with a suitable amount of moisture should promote snow showers overnight, especially across higher terrain of the northern Greens. Activity should wane as the front progresses southwards. However, by afternoon, temperatures climb into the 30s and diurnally driven instability should allow for another round of scattered snow showers, which will be well-timed with the base of the upper trough pivoting southeastwards during the day.

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19 hours ago, backedgeapproaching said:

Full sun spots at 12.5" at noon at 64F. Will see how much is left at 7am tomorrow.  Shady spots are 16-17" -ish.

20210311_122428_compress40.thumb.jpg.d7b5f71261b821e897dfb1787872869d.jpg

 

Follow up at 7am..looks like around 10" in this spot, maybe little less.  Lots of bare yards  around town and others with patches.  I'm all for some more snow events, but no use for a 10" glacier. 

 

20210312_074450_compress91.thumb.jpg.bed831b51f82053e8e9e0046b257283f.jpg

 

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18 hours ago, powderfreak said:

This sounds pretty accurate.

Untitled.jpg.c9658704d8aa71cece4c71b0d551307e.jpg

That’s awesome, and that is just about where we are right now.

Thankfully our road is paved, so “Mud Season” isn’t really a thing in our immediate area, but it certainly is throughout the state for many.

I’m not sure about that “Actual Spring” though – I guess we can get a smidge of that depending on the year, but I’m not sure what “Actual Spring” is out here in the northern mountains.  To me it often feels like we’ve got this “Post Winter” season or “Spring Stick Season” that lasts through much of May, and then Bam! – summer comes at some point in June.

They are missing the actual fall “Stick Season” though.  The definitely need to update that, and I guess it would go right after “Actual Fall”?

For now though, I guess it’s back to our regularly scheduled “Third Winter”.

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40 minutes ago, J.Spin said:

That’s awesome, and that is just about where we are right now.

Thankfully our road is paved, so “Mud Season” isn’t really a thing in our immediate area, but it certainly is throughout the state for many.

I’m not sure about that “Actual Spring” though – I guess we can get a smidge of that depending on the year, but I’m not sure what “Actual Spring” is out here in the northern mountains.  To me it often feels like we’ve got this “Post Winter” season or “Spring Stick Season” that lasts through much of May, and then Bam! – summer comes at some point in June.

They are missing the actual fall “Stick Season” though.  The definitely need to update that, and I guess it would go right after “Actual Fall”?

For now though, I guess it’s back to our regularly scheduled “Third Winter”.

Should add fall mud season, an important facet in timber harvesting.  It's usually centered on November but can start earlier and last later.  I can recall only 2 years without a significant period when logging had to be shut down in late fall to avoid damage to the land and roads, 1976 and 2013.

Pack lost one inch yesterday and another overnight, down to 15" but probably retains nearly all the 6.25" LE I measured earlier in the week.

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Over achiever in temperature this afternoon.  52 under searing March sun.

First open grass patches on the south slopes.  About 6" at the snow stake on level ground.  My pond is coming up but it started out completely dry at the end of fall.  Usually it will top off each spring but there is not a lot of snow left to melt.  Need more qpf to bring the water table back up.  

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1 hour ago, PhineasC said:

BW had the groomers out again this morning and kept trails closed until they were ready. That is why we like BW. They put in max effort. Cannon wouldn’t have even bothered. I haven’t been over to Wildcat but I’m guessing they aren’t grooming much either. 

We delayed opening to regroom key intermediate routes.  Was a fun morning in the Mtn Ops office, rapidly changing plans, radio chatter gets a bit more exciting ha.  When I first radioed the groomers at 5am it was a pretty rugged report.  Turned out much better than expected.

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45 minutes ago, powderfreak said:

We delayed opening to regroom key intermediate routes.  Was a fun morning in the Mtn Ops office, rapidly changing plans, radio chatter gets a bit more exciting ha.  When I first radioed the groomers at 5am it was a pretty rugged report.  Turned out much better than expected.

Yeah, better conditions today than yesterday. Faster and a little firmer. Icy in the shady spots and tree tunnels. 

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1 hour ago, PhineasC said:

18z mesos look really healthy for the upslope spots. This could be more than the usual dusting routine. Best upslope look in a while over in the Whites.

Yeah I really like the Jay Peak area over towards northern Coos especially (Pittsburgh and the CT Lakes).  That far NNH and extreme NW ME is modeled some decent QPF over the next 48 hours from the two waves.

Definitely two distinct periods, tonight and then again tomorrow night it seems.  Flow looks fast and unblocked so this stuff should get downstream of the crest, pushing it into NEK of VT much more than usual upslope.

18z GFS

17F55849-B80C-4468-914F-119554E0015B.thumb.png.93bdd0894aef2b765dca5c7fb3622cab.png

18z HRRR

D890014D-BB0A-49B5-9318-FB2F59810F62.thumb.png.c2c074ea1471b94c2a4617f991b46cab.png

18Z 3km NAM... overdone as usual on the peaks counting rime as QPF.  0.41” at MVL is interesting though showing the unblocked flow.

44939DB1-3382-408F-B465-44966CC7E0F7.thumb.png.142b2e362906441794666bb6a658686a.png

18z RGEM

FED1FA8D-0A34-469C-91DD-D3F1472ABD5E.thumb.png.e0c72eb44c1cc9d53540beff6d573e9b.png

 

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25 minutes ago, powderfreak said:

Yeah I really like the Jay Peak area over towards northern Coos especially (Pittsburgh and the CT Lakes).  That far NNH and extreme NW ME is modeled some decent QPF over the next 48 hours from the two waves.

Definitely two distinct periods, tonight and then again tomorrow night it seems.  Flow looks fast and unblocked so this stuff should get downstream of the crest, pushing it into NEK of VT much more than usual upslope.

18z GFS

17F55849-B80C-4468-914F-119554E0015B.thumb.png.93bdd0894aef2b765dca5c7fb3622cab.png

18z HRRR

D890014D-BB0A-49B5-9318-FB2F59810F62.thumb.png.c2c074ea1471b94c2a4617f991b46cab.png

18Z 3km NAM... overdone as usual on the peaks counting rime as QPF.  0.41” at MVL is interesting though showing the unblocked flow.

44939DB1-3382-408F-B465-44966CC7E0F7.thumb.png.142b2e362906441794666bb6a658686a.png

18z RGEM

FED1FA8D-0A34-469C-91DD-D3F1472ABD5E.thumb.png.e0c72eb44c1cc9d53540beff6d573e9b.png

 

That’s a good look for here. That blob west of the Whites tends to verify overhead here from what I have seen this winter. Usually when it is fairly wet like that it’s a great sign a good bit of moisture will come down Rt 2 and get squeezed out. 

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We still have the pack. Everything is mostly covered on the hill but we need a storm or some upslope every day for a bit to fix this.  Skied some woods Thursday but a tad spongy.  Today the summit never softened with the wind blowing across the face.  The bottom stiffened right up this afternoon.  Still have full coverage but it’s going to be crunchy and loud unless we get something to create a cushion.  

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1 hour ago, PhineasC said:

That’s a good look for here. That blob west of the Whites tends to verify overhead here from what I have seen this winter. Usually when it is fairly wet like that it’s a great sign a good bit of moisture will come down Rt 2 and get squeezed out. 

Yeah I don’t think it’s all upslope either... there’s a bit of a synoptic look as well with pretty decent upper level energy dropping right through your area.  I can see why models have a 0.50-1.00” QPF north of there into southern Quebec.

Tonight wave drops through with best vorticity going from Jay Peak and then ESE through your area and towards the mid-coast.

102FF8C0-F434-4D01-80EE-DF7FDFB87791.thumb.png.6bafa8ad23cdf303ac479a4a9ed2a1f1.png

Then tomorrow night another piece of energy does the same thing.  Can tell why the models like that area of southern Quebec into NNH/NW ME.

38FE9E30-EB43-4D7B-9110-4A135E41EE03.thumb.png.fc8636f4c57e51fde49c367d605c98d6.png

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