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Super Snow Sunday 2/15-Party Like it's 1717


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Yeah I meant more later on after hr 60 and also...the fact that snow growth is pretty good down low too. Very rare indeed. If we can get good low level inflow, that's a real sweet look in terms of snow growth. Such a cold a system.

 

 

There's also a MAUL signal at 60h on the BOS sounding between about 700 and 550:

 

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TSSN? where would it be possible/likely on this run

 

I'm tired of forecasting thundersnow...everytime I mention it nothing happens.  I"m terrible at it so not going to say it.  

 

I had always assumed that vigorous lift was a key factor in thundersnow but I don't think that is the case.  Lift, obviously is important, however, you need to get an x amount of instability within the zone of strongest lift.  My guess is you would want to see some pretty steep lapse rates to help with this and probably some other stuff.

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Anyone see any "red-flags"??

For once this could be (as silence descends)  The perfect storm "White hurricane of 15" 

 

 

There's definitely still red flags in this...more than in the blizzard...we've got a narrow margin for error in digging this enough to have everything come together in time. The trends are good, but the question is if they will be enough.

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Anyone see any "red-flags"??

For once this could be (as silence descends)  The perfect storm "White hurricane of 15" 

 

seems like much of the precip would be involved with the CCB as the system really begins to crank off the coast?  If that's the case could really hurt alot of folks, particularly, the further west you go

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Yeah earlier BUFKIT actually had a bit of elevated CAPE lol. Check out the warm tongue wrapped into Boston harbor. That's helping the instability. Pretty sick.

 

oh crap..TT of 49 on that sounding...that's about as good as you'll see in a winter scenario.  Low to mid-40's is usually pretty decent but 49...not bad

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NWS discussion mentioned lapse rates on the order of 9 degrees/km in this. Obviously in the summer that would be like an EML pants tent type rate, but I'm wondering if it's similarly impressive in a winter scenario. Would anyone be willing to speak to that? Much obliged.

If I'm understand them right, they mean in the mid levels, but it was also a bit drier there. Basically it means if you can get rising air to form clouds and punch into this level, you may get convective elements. As Will posted earlier...the saturated lower levels are already borderline unstable.

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NWS discussion mentioned lapse rates on the order of 9 degrees/km in this. Obviously in the summer that would be like an EML pants tent type rate, but I'm wondering if it's similarly impressive in a winter scenario. Would anyone be willing to speak to that? Much obliged.

 

we would be looking at Oct 11 type stuff with the thunder/lightning if that happened.  We would essentially have thunderstorms but pure snow instead of rain...perhaps even rivaling the blizzard a few years back with 5-6'' per hour rates.  Hopefully we get 9 C/KM this summer

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Good, Question is that LLJ in a position to blast anyone during the storm? I mean Power outages and such?

I haven't dived into soundings tonight, but late developing mid levels should keep LLJ focuses over eastern areas.

However, rapid deepening of the low will support a great deal of backside CAA winds. Nothing to sneeze at there.

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