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December 16-17, 2020 Winter Storm Obs/Nowcasting


WxUSAF
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Just now, Ji said:

good luck with the you know.....the other S stuff

He’s north of 70. He’ll make up for some of the damage with that band later on 

 

Just now, Ji said:

the 3k NAM at 6z was a disaster. Had us high and dry in the DMV till like 1:00pm

Hi res NAM has handled none of this correctly so far 

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4 minutes ago, Eskimo Joe said:

Some good news, especially for the I-95 crew and the immediate low landers. Frederiskcburg and Louisa, VA were -RA at the start but once the heavier precip moved in they've not flipped to -SN. Even Quantico, which is right on the river, has -SN now so there might be a bit more 'boom' with the snow thanks to the earlier onset.

Sleet here at the moment a little NW of Fredericksburg and 29 degrees

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4 minutes ago, Eskimo Joe said:

Some good news, especially for the I-95 crew and the immediate low landers. Frederiskcburg and Louisa, VA were -RA at the start but once the heavier precip moved in they've not flipped to -SN. Even Quantico, which is right on the river, has -SN now so there might be a bit more 'boom' with the snow thanks to the earlier onset.

You can see the CC line get shunted off to the east.  Looks ok for another 1-2 hours in the DC area (better NW of course).

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Just now, jayyy said:

Imagine we had some semblance of blocking in place to keep that high anchored in

We do have some semblance of blocking.  A track up the Bay would be rain to Binghamton if there wasn't that high pressure/confluence/blocking.  It's not 100% perfect, but the best we've had in ~22 months.  

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