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January 28/29th Storm Model Disco and Obs


NorthArlington101

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I like 0.5" - 1" as of now...We should do 15:1, so 0.03 gets us 1/2"...looks like at least we'll get an hour or 2 of light snow

I think that's reasonable... though I dunno if I'd bet on it.  This is a wait to see radar later type of situation around here probably. 

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I like 0.5" - 1" as of now...We should do 15:1, so 0.03 gets us 1/2"...looks like at least we'll get an hour or 2 of light snow

 

 

15-1 looks reasonable.  You're right, 0.03 would get you over 0.50 inch.  I think the woebegone sref mean is around .03 or 0.4 if you throw out the two highest members so you could be right.   I hope so cause i have a fear our next winter weather event will be more of a icing threat than a snow one but there still is lots to work out. 

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Mount Holly's take on the situation-

 

...AS HAS BEEN THE CASE THOUGH THIS WINTER, THE TIMING OF SHORT WAVE

ENERGY CAN CHANGE THINGS AND THIS APPEARS TO BE ANOTHER EXAMPLE.

THE MAIN SHORT WAVE ROUNDING THE BASE OF THE UPPER-LEVEL TROUGH
APPEARS TO BE SLOWING SOME MORE, WHICH LEADS TO THE TROUGH AXIS
ORIENTATION CHANGING SOME. THIS THEREFORE AFFECTS THE DOWNSTREAM
FLOW SUCH THAT ASSOCIATED LIFT ESPECIALLY IN THE 700-800 MB LAYER
SHIFTS FARTHER NORTHWEST. THE 12Z NAM AND GFS HAVE SHIFTED MORE
INLAND WITH MEASURABLE PRECIPITATION, WHICH IF CORRECT WOULD BRING
SOME ACCUMULATING SNOW ACROSS AT LEAST PORTIONS OF THE INTERSTATE
95 CORRIDOR. THE NAM MAY BE TO WET ON ITS NORTHWEST EDGE, HOWEVER AN
EXAMINATION OF ITS MASS FIELDS SHOWS STRONG 700-800 MB FRONTOGENETIC
FORCING MOVING ACROSS THE DELMARVA AND SOUTHERN NEW JERSEY TONIGHT.
THIS COMBINED WITH ISENTROPIC UPGLIDE WOULD RESULT IN HEAVIER SNOW
FOR THE SOUTHEASTERN AREAS. THE GFS ON THE OTHER HAND IS NOT QUITE
THERE YET. GIVEN THE SIGNALS OF AT LEAST SOME SNOW GETTING FARTHER
INLAND TONIGHT, THE POPS WILL BE INCREASED. IT DOES APPEAR THERE
WILL BE A SHARP WESTERN EDGE FROM SNOW TO NO SNOW.

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