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March 7th 2018 Coastal Storm thread (not obs)


Rjay

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40 minutes ago, NorthShoreWx said:

I'm a few miles east of you, but this is a nailbiter for us at the moment.  A lot of times you can see the rain writing on the wall even if you don't want to admit it, but this one is not a foregone conclusion.  I was thinking a few inches of mush late this afternoon, but now I'm more intrigued again.

 

It's been lightly flurrying here.  No sleet; just snow.

I have the same thoughts. I think 6-8” is a safe call now

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2 minutes ago, weatherbear5 said:

I'm assuming most of that is snow for most areas given the track? What do the thermals look like in the questionable areas, if that's not too much to ask

925mb, 850mb and surface.   Surface is a bit warm but that's fixable with heavy rates 

ecmwf_t925_neng_4 (1).png

ecmwf_t925_neng_5.png

ecmwf_t850_neng_4.png

ecmwf_t850_neng_5.png

ecmwf_t2m_nyc_4 (1).png

ecmwf_t2m_nyc_5.png

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2 minutes ago, Rjay said:

925mb, 850mb and surface.   Surface is a bit warm but that's fixable with heavy rates 

ecmwf_t925_neng_4 (1).png

ecmwf_t925_neng_5.png

ecmwf_t850_neng_4.png

ecmwf_t850_neng_5.png

ecmwf_t2m_nyc_4 (1).png

ecmwf_t2m_nyc_5.png

Thanks for these and all you do.

yeah, 35 degrees with those rates? Not 100% ideal, buuuuuuuut that's going to accumulate nicely given the progged rates

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Looking at:

https://weather.us/model-charts/euro/new-jersey/temperature-f/20180307-0900z.html

Choose parameters for 850mb and 925mb temp. 

850 temps never go above zero north of LBI pretty much. The worst 850 gets to around me is -3.5C, NYC about the same

925 temps never go above zero north of LBI, a little further than 850 zero. 

Most of LI has 1.0" or more liquid as snow. NYC seems to average about 1.2". The axis of max snow seems to run from just NW of Philly to I-287, though it's 1.2-1.5" liquid as snow. Maybe the algorithm here sees warm surface temps as rain, since 850 and 925 are definitely cold enough for snow for all of the subforum. 

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2 minutes ago, weatherbear5 said:

Thanks for these and all you do.

yeah, 35 degrees with those rates? Not 100% ideal, buuuuuuuut that's going to accumulate nicely given the progged rates

I don't think it will be 35. Closer to 32/33

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Just now, Eduardo said:

How much of a role do we think tonight's recon mission is playing in these model shifts?

I'm not sure if anyone could answer that since we don't know how they'd look without the recon mission. 

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