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Snow Event 1/15-1/16


Mr Torchey

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I don't know, when I look at the 18z NAM I see a good snow burst for almost all of us, even me, and maybe Phil.  1000-850 plenty cool, 8h plenty cool, warm at the surface for sure, but not terribly so that cannot be overcome by strong precip rates.

 

(this is through 20 hours)

 

Then it warms, but the front end should produce.

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I don't know, when I look at the 18z NAM I see a good snow burst for almost all of us, even me, and maybe Phil.  1000-850 plenty cool, 8h plenty cool, warm at the surface for sure, but not terribly so that cannot be overcome by strong precip rates.

 

(this is through 20 hours)

 

Then it warms, but the front end should produce.

it's cold enough for a burst of snow at the beginning. i think we could get a slushy coating or something - maybe a bit more if we are lucky - but after that it's down the drain. 

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Yeah I think we'll probably hang on to some weenie precip with low level forcing/frontogenesis behind the main slug but not as strong as the GFS has. The SREFs/NAM/Euro are really a front thump then mainly done. 

 

I do think -PL/-RA is likely for many of us in CT after the snow in the morning.

 

Just take your measurement before the change.  :)

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it's cold enough for a burst of snow at the beginning. i think we could get a slushy coating or something - maybe a bit more if we are lucky - but after that it's down the drain. 

 

I'm pretty pumped about the ski country deal.

 

Still have small hope for the weekend, more hope for the 22-23.  It is what is Phil, hopefully we can get 1-3" tonight.   I think it's a 50/50 shot.

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To back up what OceanStWX means, here is the text data for near FIT at 12z. Notice the column THTE. See near 550 mb how it drops to 313K? This means there is a somewhat unstable layer there. Indeed even soundings concur. These unstable layers sometimes occur in areas of strong thermal gradients.

 

http://www.twisterdata.com/index.php?sounding.lat=42.7147&sounding.lon=-71.9824&sndclick=y&prog=forecast&model=GFS&grid=3&model_yyyy=2013&model_mm=01&model_dd=15&model_init_hh=12&fhour=24&parameter=TMPF&level=2&unit=M_ABOVE_GROUND&maximize=n&mode=singlemap&sounding=y&output=text&view=large&archive=false

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SREF_XPROB_DEND_100__f030.gif

 

09z

 

SREF_XPROB_DEND_100__f024.gif

 

15z

 

Interesting signal to the north of the weenie band. Despite being farther from the forcing, there is a high probability of a large DGZ. This leads to enhanced snow ratios. Fluff factor could keep the sharp NW cutoff from being a reality.

 

That must be where the -8 is.  :)

 

FYI--here are the outputs for ORH/BDL/AQW.  Worcester and BDL are essentially even with about .55 average (?) and even AQW is now over .4. Quite the range between the extremes.

 

Maybe I should go 3-6 instead of 2-5.

post-462-0-93915500-1358280412_thumb.jpg

post-462-0-67916400-1358280433_thumb.jpg

post-462-0-70238700-1358280461_thumb.jpg

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To back up what OceanStWX means, here is the text data for near FIT at 12z. Notice the column THTE. See near 550 mb how it drops to 313K? This means there is a somewhat unstable layer there. Indeed even soundings concur. These unstable layers sometimes occur in areas of strong thermal gradients.

 

http://www.twisterdata.com/index.php?sounding.lat=42.7147&sounding.lon=-71.9824&sndclick=y&prog=forecast&model=GFS&grid=3&model_yyyy=2013&model_mm=01&model_dd=15&model_init_hh=12&fhour=24&parameter=TMPF&level=2&unit=M_ABOVE_GROUND&maximize=n&mode=singlemap&sounding=y&output=text&view=large&archive=false

 

 

But, this is also where there is a dry layer too. 

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That must be where the -8 is.  :)

 

FYI--here are the outputs for ORH/BDL/AQW.  Worcester and BDL are essentially even with about .55 average (?) and even AQW is now over .4. Quite the range between the extremes.

 

Maybe I should go 3-6 instead of 2-5.

 

 

15z is not out yet

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That must be where the -8 is.  :)

 

FYI--here are the outputs for ORH/BDL/AQW.  Worcester and BDL are essentially even with about .55 average (?) and even AQW is now over .4. Quite the range between the extremes.

 

Maybe I should go 3-6 instead of 2-5.

 

 

Pretty damn close to where -8 C is actually. But these kind of DGZ depths have been associated with the really high ratio snows (think 20:1 or greater).

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Nice wording in Albany's WWA for my neighboring zones--unforutnatley the p/c's fo rthem are only showing 1-3 ftl.

 

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 3 AM TO 7 PM EST WEDNESDAY. * LOCATIONS...SOUTHEAST CATSKILLS...MID HUDSON VALLEY...TACONICS...NORTHWEST CONNECTICUT...BERKSHIRES AND ALL OF SOUTHERN VERMONT. * HAZARD TYPES...SNOW...REDUCING VISIBILITIES AND HAZARDOUS TRAVELING CONDITIONS DURING THE MORNING COMMUTE ON WEDNESDAY. * ACCUMULATIONS...SNOW ACCUMULATION OF 3 TO 6 INCHES. * MAXIMUM SNOWFALL RATES...COULD APPROACH UP TO 1 INCH PER HOUR DURING THE MORNING COMMUTE ON WEDNESDAY.

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