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NYC Jan 11-12 Miller B Thread Part 2


am19psu

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Overall, the small variance in the short range models bodes cautionary for people west of the city, since they're on the fringe, heck even the city...but it does not dilute the fact that the City is still in good shape for 8-12", with the GFS not being too useful right now with its positioning and other factors.

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HPC says throw out the NAM and the GFS. To be honest...as we saw with the Boxing Day event, it's time to throw all the models out and make this a nowcasting event. We all know that the major global models are not very skilled at picking out the best banding features. NE NJ easily gets in on the heavy stuff and Western LI hits the JP. Too bad this system couldn't have found a way to stall out because this would have been historic for us. Instead it will be historic for New England.

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The radar simply looks incredible for the storm's duration from NYC on east this run (MM5). There has to be some 2-3" snow rates/hour thrown in there especially for central Suffolk. The final map might be a lot like 12/19/09.

Yea, we're going to be right on the edge of the heaviest snowfall rates.

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That would be the RGEM, and yes, it was a very good run! The surface low goes right near Montauk--much further west than the GFS.

Hey I want that track lol.... no problem with mixing issues if its a Millenium storm type deal. Wouldnt mind this tracking over the Hamptons.

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I don't like how far off the SC coast the GFS initialized the surface low. Easy to locate on recent vis just to the S/SE of Wilmington. I'd say this current positoin is 25-50 West of GFS 12 z low position. Based on an early review of 12z runs so no reason why local nws offices will change snowfall forecasts. (expection could be Eastern Mass / Coastal RI b/c of mixing and likely dry slot)

Comfirming the above, wind direction taking on a more easterly component at Hatteras with corresponding rise in surface temps. Hopefully, vort max will bring sl within and not outside of Hatteras.

KHSE 111551Z AUTO 07008G17KT 10SM OVC011 10/07 A3009 RMK AO2 RAB22E29 SLP189 P0000 T01000067 TSNO

KHSE 111451Z AUTO 05006G14KT 10SM OVC013 08/05 A3012 RMK AO2 SLP200 60000 T00830050 58005 TSNO

KHSE 111351Z AUTO 06008KT 10SM OVC017 08/04 A3013 RMK AO2 SLP203 T00830044 TSNO

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Hey I want that track lol.... no problem with mixing issues if its a Millenium storm type deal. Wouldnt mind this tracking over the Hamptons.

A low that crosses any part of LI always concerns me, but this low deepens so fast and heights crash so fast that keeping it snow isn't a big problem. Any way you cut it, the storm will be amazingly dynamic. I just don't see how the far east GFS verifies, and I think it's a lot closer to the NAM. Already, surface obs show the low getting its act together right near Cape Fear, so it could still have some surprises yet.

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The GGEM is out. Zooming in on the B and W maps, it looks like Nassau County on east gets 25mm+ in the 12 hour period from 7pm to 7am.

There is a maximum of 32 mm somewhere in central Suffolk in that 12-hour period.

FWIW TWC also upped their forecasts to 10-15 inches for NYC and 1 to two feet plus for Boston! They also said it will snow all day Wednesday NYC and Long Island. They had 4-6 inches for Philly but said that the low seems to bombing out sooner than expected and they might have to up their forecast for DC to 4-6 inches and up everyone else also-- dont know if theyre out to lunch on this or if its really bombing out sooner than expected.

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