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NYC Jan 11-12 Miller B Thread Part 2


am19psu

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GFS init. issue..

OFF THE MODEL INITIALIZATION AT 12Z, THE GFS APPEARS TOO FLAT WITH

THE SERN TROF AT 500MB AND A FARTHER OFFSHORE WHILE INTERNALLY

LOGICAL, MAY BE TOO EAST. THE WALLOPS 1C WARMER TEMPS AT 850MB

ARE NOT EXTENDING THAT FAR INLAND AS APG AND IAD 850MB TEMPS ARE

AT OR BELOW -4C AND MODEL INITIALIZATION IS TOO WARM THERE. SO NO BIG

PTYPE CHANGES WITH THIS UPDATE

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I was just about to comment on that, but over central suffolk there is a stripe of 1.25in in 3 hours! if true that would lead to snowfall rates on the order of 4-5 in/hr which is just insane

Well if the ratios are 12:1 than 1" QPF per hour is 4 inches per hour. If its 1.25" in three hours its 5 inches per hour!

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If the meso models verify, 5 to 10 miles is going to make a huge difference in the five boroughs...pretty fascinating.

Some storms to consider.... Feb 1961... NYC 16 inches JFK 24 inches.... Feb 1969... NYC 15 inches JFK 24 inches.... Feb 1983... NYC 18 inches JFK 22 inches.... Feb 2003... NYC 20 inches JFK 26 inches

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QPF output is remarkebly close to the boxing day event. Only difference is the JP zone is 10-20 miles further east. Let's not forget the trend has been closer to the coast and stronger. Still another model run or two to move it inland even further if the faster "bombing out" as indicated verifies.

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ARW and NMM agree that LI jackpots, but are different in their western extent. ARW only goes .75"+ for NYC, while the NMM is over 1.25". Substantial difference there.

ARW is close to 1.25".

Queens is close to the 1.50" shade

NMM has the 1.50" line in all of Queens.

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I wouldn't bother with GFS, it is way off on placement and strength already with the coastal low, and it can't deepen such a compact low quick enough.

Good morning Jason.... hope you got enough sleep lol. This is going to be a fascinating day and night!

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This time my area is the one who's only getting 6" while 30-40 miles to my east and northeast, they're getting 20-24"+ amounts. I'm fine with that considering I was near the jackpot of the Boxing Day Storm.

You think youre going to mix? Because if Philly gets 6 inches, you'll get at least 10......

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