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general march discussion


earthlight

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The coastal itself is more supressed on the 06z run, we probably need a full phase here to make it work for our region.

and the 12Z run will show something completely different .....what it will come up with 168 hours out is anyones guess

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maybe...maybe not, when you look at the DGEX, the 00z Canadian and the 00z EC they are all in fairly good agreement.

I was only talking about the GFS model which I still think is going to be all over the place the next few days in regards to the 3/24 event and might even lose it for a time which it is famous for....probably going to be more of an over running event with the warmer air riding over the cold dome.....

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Looking at 12z Euro soundings for LGA:

Rain switches to frozen hour 138. And then .58" of precip falls with 850's well below and surface 33-35 degrees thru hour 162.

Thicknesses are a little high before crashing, so it could be some sleet as well. Pure snow looks to begin after hour 144.

Euro is a full day quicker then the GGEM.

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no, but who knows. best case scenario we get a few inches. and it would have to occur at night...sun is strong now.

With the 850s shown on the 0z GFS during the snowfall, it wouldn't make much difference if it occurred during the day, except for perhaps slowing accumulations in extreme urban areas like downtown Manhattan. 850s are like -5C to -10C, which is plenty cold for a daytime snowfall in late March, no big deal. This wouldn't be a marginal event IF models are correct with the degree of the cold.

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What do the soundings look like for KMMU? Thanks

The 12z GFS was dry for our area with the wave passing south, and you can see the dewpoint depression of the sounding indicating an unsaturated atmosphere. Anyway, here is 168:

Cold but no moisture. Would totally suck if this wave passed to our south and hit BWI/DC in late March. Ugh.

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The 12z GFS was dry for our area with the wave passing south, and you can see the dewpoint depression of the sounding indicating an unsaturated atmosphere. Anyway, here is 168:

Cold but no moisture. Would totally suck if this wave passed to our south and hit BWI/DC in late March. Ugh.

what I meant was, what did the Euro show for KMMU :guitar: Its hard to tell based on the E-Wall maps.

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MMU Euro... in order: surface temps, 850 temps, surface pressure, surface humidity, 700 humidity, 6 hr precip, 500 hghts, 1000/500 thick.. Bolded is precip amount.

WED 06Z 23-MAR 4.4 1.1 1011 93 100 0.09 558 549

WED 12Z 23-MAR 2.0 -0.9 1011 96 100 0.25 557 548

WED 18Z 23-MAR 2.0 -1.6 1010 93 68 0.26 555 546

THU 00Z 24-MAR 1.9 -3.8 1014 96 32 0.04 550 539

THU 06Z 24-MAR 0.8 -5.3 1016 91 42 0.02 549 536

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MMU Euro... in order: surface temps, 850 temps, surface pressure, surface humidity, 700 humidity, 6 hr precip, 500 hghts, 1000/500 thick.. Bolded is precip amount.

WED 06Z 23-MAR 4.4 1.1 1011 93 100 0.09 558 549

WED 12Z 23-MAR 2.0 -0.9 1011 96 100 0.25 557 548

WED 18Z 23-MAR 2.0 -1.6 1010 93 68 0.26 555 546

THU 00Z 24-MAR 1.9 -3.8 1014 96 32 0.04 550 539

THU 06Z 24-MAR 0.8 -5.3 1016 91 42 0.02 549 536

Can you do HPN?

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HPN Euro... in order: surface temps, 850 temps, surface pressure, surface humidity, 700 humidity, 6 hr precip, 500 hghts, 1000/500 thick.. Bolded is precip amount.

WED 00Z 23-MAR 7.9 3.4 1009 91 96 0.20 558 551

WED 06Z 23-MAR 4.1 -0.2 1011 87 93 0.05 557 548

WED 12Z 23-MAR 1.9 -2.2 1011 94 99 0.16 555 546

WED 18Z 23-MAR 2.0 -2.8 1010 93 82 0.25 553 545

THU 00Z 24-MAR 1.6 -5.5 1014 96 44 0.05 548 537

THU 06Z 24-MAR 0.9 -6.5 1016 91 55 0.03 547 535

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Looks like an easy 1-3" on the back end, maybe 2-4" for those above 500' elevation.

Anything after 6z Wednesday, is most likely snow for HPN. So its close to .50" QPF. Surface shows 33-34 but euro is always a tad warm at surface in long range and corrects itself closer in.

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