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February 5-6 Storm Threat I


Baroclinic Zone

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Well I'm just relaxing after driving 400 miles today. Very deep snow on the east side of the Hudson Valley from northern Westchester to a bit SE of ALB. Like you are driving through tunnels. :) I guess SNE looks like that.

you would do well according to the euro.. better than round 2 from the other day at least.

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Well the models usually hone in on a solution in the final 24 hours nowadays. :rolleyes: We'll know by 0Z tomorrow night. :)

Its been pretty amazing recently with the model solutions...the Jan 26-27 storm had a disaster inside of 3 days too. The Euro has had many problems inside of 3 days this season when its normally a sniper.

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if i remember correctly, it's been too far s/e with every storm this winter

I think that's been the case for most guidance.

So I'd favor a hugger track...but it still doesn't make it an easy forecast. The heights crash very quickly and a lot of places flip to snow even on the Euro...so something slightly colder would throw even more of a wrench into the equation.

Though that's pretty much been my rough thinking on this system for SNE...interior like Monads/N ORH county sees maybe some brief ptype issues early on and then flip to snow while the rest of the region goes rain to snow. The Euro is actually sleet and freezing rain to snow over interior this run as sfc temps are below frz there.

But just a tiny little shift in thermal profile could make a decent difference for some areas (like 2 inches vs 6 inches)

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00z Euro has a rain to flash snow event. The further west the better, however, as in western CT, Berks, etc. Catskills of NY probably wind up with highest snowfalls, on the order of a moderate event -- 8" or so -- on this Euro run.

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6Z NAM continues to trend warmer from the 18Z / 0Z thumbsdownsmileyanim.gif

still looks like 4-8 interior... if i've learned anything this season, it's to wait until 24 hrs prior to an event as models have been abominable... but as i've said since yesterday, climo favors the warmer solutions. the juju takes a breather... back with a miller B bomb tuesday...?

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00z NAM and GFS are too weak and too far SE. They both have busted badly on ongoing precip. over southern AR, east TX, and southern OK. You can see on radar and water vapor loops that the shortwave entering the southern Plains is hanging back more which will promote more phasing, and keep the surface low stronger and closer to the NJ coast than the GFS and NAM indicate.

The 00z ECMWF ensemble (left) and operational (right) have caught these changes well. Notice how much slower the southern Plains system is compared to the ECMWF from 24 hours ago - huge changes for a 1 to 2 day forecast.

Given these trends, I'm backing off from yesterday on snow in the BDL-BOS corridor. Agree with Will that this is a very difficult forecast, but the probability that the event stays mostly snow from DXR to BDL to BOS has decreased markedly.

Western MA and interior southern NH look to be in the best position for 4"+ at this point. ZR could still be an issue in the corridor from BDL to ORH County and even into NE MA.

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I still think the risk is a little more closer to the coast, unless the meat grinder GFS verifies. The s/w speed and shearing is the only real thing arguing for an offshore track, but if that trends stronger...then this comes closer.

Unfortunetely, I may be right and not just for the coast.

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