Forecast Last Updated at Tuesday, January 16, 2018 at 7:03AM
Light Snow Tonight into Wednesday
The today is relatively pleasant (compared to the last two days) after a cold start. But a front arrives from the west this evening with a potent upper-level low passing through to our south. The result is increasing clouds with light snow developing tonight. Arctic reinforcements arrive late tonight making Wednesday much colder with snow showers, flurries, and gusty winds. Total snow accumulations by Wednesday night will be 1"-3" favoring mountaintops near the TN/NC state line. This is the last arctic blast in the foreseeable future--expect gradually moderating temperatures for the rest of this week beginning Thursday afternoon.
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Hi: 36 Lo: 11
Increasing clouds; Light snow tonight; Turning sharply colder tonight; Light SW wind becoming NW 5-15 mph tonight, gusty late
Hi: 16 Lo: 8
Snow showers & flurries into the evening; Frigid; NW 10-20 mph, gusts to 45 mph in the PM
Hi: 37 Lo: 15
Becoming sunny; Cold; NW wind 10-20, gusty but becoming 5-15 mph Thur night
Hi: 46 Lo: 24
Mostly clear; Milder temperatures
Hi: 50 Lo: 32
Mostly clear; Another step milder
Sunday - Increasing PM clouds; Mild; High in the lower 50s; Low in the upper 30s
Monday - Cloudy; Showers ending in the evening; Turning cooler Mon. night; High near 50 degrees; Low in the lower 30s
The next cold blast is the last one for as far as the weather eye can see, but it will be a cold flourish before the pattern change.
A cold front moves through this evening. Clouds increase, and light snow develops tonight. Snow showers and flurries continue Wednesday with a lull in the morning. Total accumulation by Wednesday will generally be 1"-3" with an isolated, western mountaintop picking up a bit more. The forecast challenge today is balancing potency of the upper-level passing to our south and a relatively dry airmass; that adds some uncertainty to the forecast. As the low intensifies tomorrow, the NC Piedmont will get more snow than us.
Temperatures nosedive late tonight and continue to fall Wednesday. Add a gusty wind to tomorrow's wardrobe choices for subzero windchills (below -20° on mountaintops).
A pattern change is coming. Our supercold mid December to mid January has been driven by unusually strong high pressure in the Eastern Pacific driving a cross-polar flow into the middle and eastern U. S. That pattern is breaking down finally resulting in much milder weather by the end of this week.
Thursday afternoon is less cold after a frigid start to the day. Add 10 degrees Friday afternoon, another 4-5 Saturday afternoon, and yet another 4-5 Sunday. Valleys will continue to have cold nights with good radiational cooling conditions.
The next front is of Pacific origin. It arrives Monday with rain showers followed by cooler air Monday night.
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