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This is pretty impressive for the NNE crew over the weekend, should be some great squalls

Yeah definitely a little bit of powderfreak frolicking in the snow for a couple days there. Some upslope enhancement should occur of course aside from the ULL snow showers.

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Yeah definitely a little bit of powderfreak frolicking in the snow for a couple days there. Some upslope enhancement should occur of course aside from the ULL snow showers.

 

That's got some potential for elevation snowfall.  925mb temps lag a bit behind 850, but models are signaling a good 0.5"-0.7" from Mansfield to Jay Peak in a snow column above 2,000ft, and eventually lowering to the valley. 

 

You've got the upper level low with low level orographics underneath, may bring something to have a little fun with this weekend.

 

Just noticed the 6z GFS had 24-hour precip amounts of around 1.0" in the Mansfield to Jay Peak stretch...that would actually be a nice little dump for the ski areas...

 

GFS_upslope_zpsdzulxpjm.png

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That's got some potential for elevation snowfall.  925mb temps lag a bit behind 850, but models are signaling a good 0.5"-0.7" from Mansfield to Jay Peak in a snow column above 2,000ft, and eventually lowering to the valley. 

 

You've got the upper level low with low level orographics underneath, may bring something to have a little fun with this weekend.

 

Just noticed the 6z GFS had 24-hour precip amounts of around 1.0" in the Mansfield to Jay Peak stretch...that would actually be a nice little dump for the ski areas...

 

GFS_upslope_zpsdzulxpjm.png

Yea thats a nice look PF

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Yea thats a nice look PF

 

Still real early, but nice to see the GFS/ECMWF/GGEM are all pretty much in agreement with the synoptic look on Saturday.  The problem is how often do the models nail positions of H5 and H7 lows this far in advance?  Something is bound to change.  If that set-up came though, there's a decent duration to it and I'd almost bet its under-done.  I've seen these marginal air-masses (with higher PWATS) wring out some surprising QPF over the crest.

 

Funny that its the system moving through the west right now.  Hopefully it holds its strength as it looks fairly potent once over the Plains and Great Lakes.

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BTV chuckin' them... they know where their priorities are.  I know most on the board echo this sentiment:

 

AS THE ATTENDING SURFACE COLD FRONT SHIFTS
THROUGH THE REGION, GUSTY SOUTHWESTERLY WINDS SHIFT TO THE
WEST/NORTHWEST AND THIS COMBINED WITH DEEP LOW/MID LEVEL MOISTURE
STILL OVER THE NORTH COUNTRY WILL SET THE STAGE FOR THE FIRST (OF
HOPEFULLY MANY)
UPSLOPE EVENT OF THE SEASON.

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Both GEFS and EC ensembles do look a bit cooler (not blistering cold or anything) in the LR...they retro the low height anomalies a bit west which allows a little bit more cold air to come into the CONUS...the western US looks the coldest initially, but something to watch as ridging pops up a bit in W Canada...becomes more split flow which may cool us down a bit.

 

We aren't at the point of any large scale -AO though.

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Both GEFS and EC ensembles do look a bit cooler (not blistering cold or anything) in the LR...they retro the low height anomalies a bit west which allows a little bit more cold air to come into the CONUS...the western US looks the coldest initially, but something to watch as ridging pops up a bit in W Canada...becomes more split flow which may cool us down a bit.

 

We aren't at the point of any large scale -AO though.

 

What I'm noticing is that we certainly need more cold in Canada, especially in our adjacent zones.  Even NW flow isn't advecting in anything cold at this point.  I've been noticing it while following the possible mountain snow this weekend, the air to our north is just so marginally cold.  Pockets of 850mb temps that are above zero mixed in with sub-zero temps.  All the while 925mb holds at like 0C or +1C.  Not a cool look at all in some of these soundings for the weekend.  And that's with backside NW flow behind a fairly potent shortwave. 

 

Not a fan of having like 1,000 miles between the 0C and -10C isotherms at H85, haha.  I could see a lot of elevation events heading through December as you get marginally sub-freezing air  aloft but Pacific puke underneath it.

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What I'm noticing is that we certainly need more cold in Canada, especially in our adjacent zones.  Even NW flow isn't advecting in anything cold at this point.  I've been noticing it while following the possible mountain snow this weekend, the air to our north is just so marginally cold.  Pockets of 850mb temps that are above zero mixed in with sub-zero temps.  All the while 925mb holds at like 0C or +1C.  Not a cool look at all in some of these soundings for the weekend.  And that's with backside NW flow behind a fairly potent shortwave. 

 

Not a fan of having like 1,000 miles between the 0C and -10C isotherms at H85, haha.  I could see a lot of elevation events heading through December as you get marginally sub-freezing air  aloft but Pacific puke underneath it.

 

The good thing is that it isn't a Pacific firehose. You are cooked if that happens. There is just enough amplitude in NW Canada to get colder air into the Plains and then perhaps head east. It's one of those patterns that would work in winter..but borderline right now for the area..expect maybe higher terrain.  But overall...it's not a wintry look at the moment....but also not an all out furnace towards the end of the runs.

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The good thing is that it isn't a Pacific firehose. You are cooked if that happens. There is just enough amplitude in NW Canada to get colder air into the Plains and then perhaps head east. It's one of those patterns that would work in winter..but borderline right now for the area..expect maybe higher terrain.  But overall...it's not a wintry look at the moment....but also not an all out furnace towards the end of the runs.

I consider this all good news! I can't remember the last time we had a front-loaded winter, and it does not look like that memory will be refreshed anytime soon. What's this next week looking like after the mini cold bout this weekend? 

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I consider this all good news! I can't remember the last time we had a front-loaded winter, and it does not look like that memory will be refreshed anytime soon. What's this next week looking like after the mini cold bout this weekend? 

 

 

Mild.

 

We do have high pressure over us though and this time of the year you can still get pretty chilly at night...so a few days might be mild days but chill quickly at night in the rad spots.

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I consider this all good news! I can't remember the last time we had a front-loaded winter, and it does not look like that memory will be refreshed anytime soon. What's this next week looking like after the mini cold bout this weekend? 

 

Well, not sure how good it is if you have a semi-permanent trough over the Rockies and SW US. My point is that it isn't a complete void of colder air from Canada. 

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Well, not sure how good it is if you have a semi-permanent trough over the Rockies and SW US. My point is that it isn't a complete void of colder air from Canada. 

 

Mild.

 

We do have high pressure over us though and this time of the year you can still get pretty chilly at night...so a few days might be mild days but chill quickly at night in the rad spots.

Understood. I don't mind mild, but it really would be nice to have a good stretch of chilly weather. 

I know it's somewhat frowned upon to post tweets, but this seemed to get a lot of traffic then slowly die. Any thoughts on this?

 

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Understood. I don't mind mild, but it really would be nice to have a good stretch of chilly weather. 

I know it's somewhat frowned upon to post tweets, but this seemed to get a lot of traffic then slowly die. Any thoughts on this?

 

 

That is basically the time period I have in my 8 weeks for a early season chance, I don't think it persists but if my calcs are close it could be an interesting 7-10 days.

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Understood. I don't mind mild, but it really would be nice to have a good stretch of chilly weather. 

I know it's somewhat frowned upon to post tweets, but this seemed to get a lot of traffic then slowly die. Any thoughts on this?

 

 

 

I can't access twitter at work...so no idea what it says.

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I can't access twitter at work...so no idea what it says.

 

It was a tweet from Mike V saying the last time we had IO forcing like this., 3-5 weeks later that pattern flipped to colder east. Probably indicating the natural eastward progression of typical forcing. Whether it happens remains to be seen...but makes sense I guess.

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It was a tweet from Mike V saying the last time we had IO forcing like this., 3-5 weeks later that pattern flipped to colder east. Probably indicating the natural eastward progression of typical forcing. Whether it happens remains to be seen...but makes sense I guess.

 

That would be pretty nice timing if it happened like that. That puts us anywhere from about Dec 1 to Dec 15 when (if) we flip colder.

 

 

I will definitely want to see start seeing more solid Aleutian low placement on the EC ensembles over the next week or so showing up consistently near the end of the their run to gain some optimism.

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Will's ski trip to CO looking better and better on Euro.

 

That's such a good pattern out west...a deep trough every 3-5 days seemingly. Just one after another.

 

Gonna be a great early season out there. We'll just have to see if the good pattern for them holds through December.

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