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Watching closely .. February 1-3rd for moderate to major coastal event


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Box AFD:

Heavy snow...

As mentioned above very cold/dry airmass over the region this evening will set the stage for an impressive front end thump of
heavy snow Monday afternoon and evening. Very strong easterly jet at 850 mb of 5 standard deviations will provide an Atlantic
fire hose of moisture to overrun the cold/dry airmass currently over the region. This strong forcing for ascent will be enhanced
by mid level instability Monday afternoon and evening as dry slot approaches. This entrainment of mid level dry air will
steepen mid level lapse rates and result in 1-2" hourly snowfall rates Mon afternoon and evening. HREF supports this with high
probs of 1-2" hourly rates. Even the HREF hourly mean is 1.5-2.0 inches. That combined with instability aloft, would not be
surprised if 3+ inch hourly rates for a time in the strongest snow bands, along with a low risk of TSSN! Nevertheless, travel
will be extremely difficult Monday afternoon and evening given these hourly snowfall rates. Given the evaporative cooling
potential initially, followed the colder guidance here. Although given low level temps are marginal across Eastern CT/RI/MA,
followed the lower SLR from the NBM which are less than 10-1. Although this may be offset early on as snow growth is very
favorable 18z-00z. Thus heavy wet snow across this region will increase the risk for snow loading issues/tree damage and power
outages.

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4 minutes ago, wxsniss said:

Box AFD:

Heavy snow...

As mentioned above very cold/dry airmass over the region this evening will set the stage for an impressive front end thump of
heavy snow Monday afternoon and evening. Very strong easterly jet at 850 mb of 5 standard deviations will provide an Atlantic
fire hose of moisture to overrun the cold/dry airmass currently over the region. This strong forcing for ascent will be enhanced
by mid level instability Monday afternoon and evening as dry slot approaches. This entrainment of mid level dry air will
steepen mid level lapse rates and result in 1-2" hourly snowfall rates Mon afternoon and evening. HREF supports this with high
probs of 1-2" hourly rates. Even the HREF hourly mean is 1.5-2.0 inches. That combined with instability aloft, would not be
surprised if 3+ inch hourly rates for a time in the strongest snow bands, along with a low risk of TSSN! Nevertheless, travel
will be extremely difficult Monday afternoon and evening given these hourly snowfall rates. Given the evaporative cooling
potential initially, followed the colder guidance here. Although given low level temps are marginal across Eastern CT/RI/MA,
followed the lower SLR from the NBM which are less than 10-1. Although this may be offset early on as snow growth is very
favorable 18z-00z. Thus heavy wet snow across this region will increase the risk for snow loading issues/tree damage and power
outages.

That’s a keeper of an AFD for sure!

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1 hour ago, weatherwiz said:

The H7 closing off so early and actually becoming pretty tightly compact (is that even the proper term for it lol) seems to ingest alot of dry air ahead of it and while we do try to recover it might not be enough. Just another ughhhhhhhh here lol. 

Your getting me nervous ha!

And on que V 16 drops a tad more to about 13 to 14.

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2 minutes ago, RUNNAWAYICEBERG said:

We’ll get a foot and probably a touch more. Not historic but great. Don’t sweat it.

Yup ..if that 7 H low would behave and just move ENE it would likely be different.   N NJ NE PA SNY elevations ...Crushburger

Still we take... a foot maybe a lil more  and enjoy and keep them good vibes goin

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4 minutes ago, STILL N OF PIKE said:

Yup ..if that 7 H low would behave and just move ENE it would likely be different.   N NJ NE PA SNY elevations ...Crushburger

Still we take... a foot maybe a lil more  and enjoy and keep them good vibes goin

A h7 kick NE miracle from above would be welcomed but we not demanded. Appreciate what we get and vibe to it. GL up there.

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7 minutes ago, tiger_deF said:

As someone still fairly new to weather how come this event and its setup is considered more unusual?

Not really that unusual.  Actually not that uncommon every couple of years or so. Very fast easterly flow at 850 mb is conducive to lots of lift in the atmosphere 

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