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The Monday wintry event potential (12/8/25)


GaWx
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This has been a rather tough forecast, mainly due to the fact that this will be developing directly overhead. However, it's hard to ignore model trends across southern Virginia and the NC mtns. I am now beginning to wonder if this will just begin as snow for most, considering the current observations are running a bit colder than what guidance has been showing. If it does begin as snow, I expect some of the higher totals to verify. One thing I have noticed is somewhere across central/southern VA, some mesoscale banding will likely produce some efficient snowfall rates. This is noted in a band of stronger FGEN running west to east as pictured below. Rates within this zone will likely see 1in/hr at times.

 

NBM probabilistic guidance supports this with an area of higher probabilities across southern VA/NW NC. 

Based on 01z NBM of 24hr snowfall greater than 4.0 inches is now at:

DAN: 60%

ROA: 80%

LYH: 80%

TNB: 70%

A very sharp drop in probabilities occur along and south of the VA/NC border. However, probabilities for at least 1.0 inch is around:

GSO: 60%

RAH: 40% 

 

namconus_temp_adv_fgen_700_neus_1.png

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The snow hits behind the front so what is happening ahead of it is not as important. Most areas probably will start as some rain before changing over. The previous event was WAA this one is more anafrontal with cold air feeding in (Cold Air Advection).

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I was optimistic last night coming home from Pfafftown as the temp dropped and was 32* when I got home. I checked a few times overnight and the temp went to 34*, then 35* and now it’s 36*. We have light rain and I’m hoping the cold air north of Dville makes its way here. 

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37, 37 here. Don’t think there’s been a northern trend or really much movement at all in models, just need the precip. The heavier totals in VA are from more precip, not more northern movement of the system. Precip amounts have increased south of there into NC as well. Models have generally been ticking up over the last 3 days especially in Virginia where a legit storm looks likely. Here in NC it’s all about how much precip gets in after the front. Current advisory outline looks correct. I expect 1/2” to 1” for the advisory area increasing to 2-3” for the border. Travel issue should be limited until this evening but overnight/tomorrow morning roads are going to be terrible area wide with the flash freeze coming this evening regardless of whether snow accumulates in your area.

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