12KM NAM as far as the R/S line is closest as of 17Z but I do not buy its idea of big snows 00-06Z for LGA/NYC region as I think this thing is already giving way and weakening by then
The 06Z Euro might be the closest to verifying right now. Its got the area off the coast and the semi dry slot between bands. It is underdone though over N NJ to some extent but is still probably verifying best
Its already wrong. Its 16-17Z depiction based on current radar does not have the showery look between CDW-FRG. I'm trying to find a high res model at the moment that seems to be handling this best. Overall the HRRR might be closest.
So far the models all seem to be too far to the east with everything based off the current observations so I'm still leaning mostly towards a miss in NYC
I don’t believe any model will get this extremely correct. When you look at the 06Z models and the latest HRRR all of them to some degree have the current setup wrong
Nothing high res at 06Z really showed that band there. I’m not sure if that’s a long duration feature or not. The area over NYC was shown on most models but it was further west than it currently is
The HRDPS and RGEM vary a ton from winter to winter. They were awful last year. Today the RGEM was very good hitting the heavy totals from Albany to MA. The HRDPS not as much
18Z Euro at fast glance without seeing snow maps would seem to have heaviest snows bounded by FWN-CDW or so but it was a rough glance. It seemed less impressive for central to southern NJ and inched its way closer to NYC but not there yet
It looks to me to still have the best snows over NJ to their W-NW but it’s been creeping East with that area. It won’t take much to get it over NYC but with marginal temps the snow accum maps are gonna be way off. I think 4-7 with maxes of 8-9 will be the best anyone sees there
BOS might get a brief window depending how that sleet line advances. One of the mesos, The 3Km NAM I think hinted that they’d change over at 00-01 but then have a period of heavy PLSN at 03-04Z just ahead of the complete changeover to rain
This is the typical early season lousy snow growth setup where radar looks impressive suggesting mod snow 1/2SM but Logan is 33-35 in east flow and does not have temps supporting good snow growth. I had them getting 4-5 but I doubt it happens now.
There has been an ever so slight nudge east it seems at 12 and 18Z today overall but probably still need a 30-50 mile shift. That can more or less occur simply off average model error by this time tomorrow
The temps are so marginal and the band likely won't be as expansive as modeled so those totals will be limited to small areas. I would expect you'd see mostly 4-7 with isolated area over that
The good news for the snowhounds is that the 3km NAM was by far the best model today on ptype/changeover time. If it holds its idea for tomorrow the snow axis is definitely further east than the other guidance.
Winds flipping 070-080 now at JFK. that mini wedge is starting to be punched out. All await that T measurement from NYC now....it was about a half inch here