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OBS-Nowcast Noon Saturday 2/15-Noon Monday 2/17


wdrag
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Cherry picking but if you go to Trop Tidbits, globals ECAI, 2m T at 18z today, then go back all the versions you can, at least back 120 hours, you'll see how consistent the ECAI was regarding todays 18z T.  Its running a couple degrees warmer, especially central NJ but at 120 hours, and then you keep seeing how the cold was tucked in, you should be impressed with this modeling and how threatening this looked for ice into midday today. Click for clarity.

Screen Shot 2025-02-16 at 11.59.31 AM.png

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5 minutes ago, wdrag said:

Cherry picking but if you go to Trop Tidbits, globals ECAI, 2m T at 18z today, then go back all the versions you can, at least back 120 hours, you'll see how consistent the ECAI was regarding todays 18z T.  Its running a couple degrees warmer, especially central NJ but at 120 hours, and then you keep seeing how the cold was tucked in, you should be impressed with this modeling and how threatening this looked for ice into midday today. Click for clarity.

Screen Shot 2025-02-16 at 11.59.31 AM.png

Temps are already crashing in western pa and ny,the cold air was stubborn thruout. And i agree that is almost spot on for almost a week ahead.

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4 hours ago, donsutherland1 said:

So far, the temperature is running colder than had been modeled for New York City. The 2/16 6z NBM had a 13z reading of 39°. The 12z run had 38°. The current reading is 33°. Whether this means that the temperature won't surge to or above 50° still remains to be seen. If, by 20z, readings continue to run well below the modeled output (47° on the 12z NBM), that could be an indication that the high temperature will ultimately fall short of the late day figures currently shown on the guidance.

At 18z, NYC was 36°. The 2/16 12z NBM showed 44° for 18z and 47° for 20z.  It is growing increasingly unlikely that NYC will reach 50° today.

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45 minutes ago, BxEngine said:

Visibility is less than 200’ on the palisades in bergen and rockland. Worst ive seen in a while.

High dew point above shallow cold..  will try to mix.  Not doing it in PHL and doubt if it does NYC, though as Bluewave said... JFK eastward along the s shore looks briefly very mild at 4P.  There's your fog where unmixed and high inverted above shallow cold. 

Not liking how its still 31.6 here in Wantage at 118PM with ice clinging to trees and wind ready to come up at 5P and whip into power outages.  Hopefully I'm overplaying this from here north into the Catskills nw CT and W MA but its already busy in PA/NJ/NYS/CT with power problems. 

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1:15 and still below freezing here.  Currently 31.5.  Has been between 30.5 and 31.5 all morning.  Ice not accumulating at any kind of rapid rate but up to about .10" here.  Maybe a tad more.  Paved / concrete surfaces just wet.  Trees are drooping with the ice accumulation, nothing drastic but very noticeable. 

Have to say KUDOS to Walt.  He had this nailed for days suggesting temperatures were going to struggle today.  I will be paying closer attention to the EC-AFIS 2M temps going forward.  Great work on his part!

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17 minutes ago, donsutherland1 said:

At 18z, NYC was 36°. The 2/16 12z NBM showed 44° for 18z and 47° for 20z.  It is growing increasingly unlikely that NYC will reach 50° today.

50 Sandy Hook... I agree Manhattan and LGA not 50 there but its not quite done.  Dense fog tells me heat is just a few hundred feet above you. 

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SPC HREF FIRE MIN wind gust is what I use for the following.  32.0F here in Wanatge.  I think we have about 5 hours (til 7 or 8 tonight) to get rid of our remaining ice, probably too late for some spots in se NYS/W of the CT River and SPC HREF FIRE min wind gust increase rapidly 5P-8P, with worst of the wind tomorrow morning. 

Power outages continue to increase and it looks to me like pretty big problems coming to e NYS, ne PA, nw NJ and w of the CT river in SNE.  Best I can do... not an absolute but we'll be busy cleaning up tomprrow and Tuesday.

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