Timing Today’s Snow Thump

Heaviest snow in the District will arrive between 2 and 5pm, a bit earlier west of town and a bit later east of town. Rush hour combined with heavy snow and falling temperatures do not equal happy people, so do not focus on the “tea leaves” which i am about to show those of you who want more of an update than I expect between “1 to 3″ of snow” so “get the hell out of work before we sit in a ‘commute-ageddon'”.

Future Radar Simulation:

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Heavy Snow Tuesday Evening & Flash Freeze Wednesday Morning

An arctic front will rapidly approach the Washington Area on Tuesday evening accompanied by a period of heavy snow squalls that will taper off and end as flurries.  Visibility will rapidly decrease Tuesday evening during the heavier snow with one to three inches of accumulation possible. Behind the arctic front temperatures will plunge into the teens with a flash freeze likely across area roadways causing widespread delays Wednesday morning.

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Wind Chills Bottoming Out Near Twenty Below Zero Tonight

The latest High Resolution Rapid Refresh (HRRR) model (images below) show’s just how low the temperatures and wind chills will go with CAD (Cold Air Advection) in full-throttle this evening and overnight. Actual air temperatures will plummet into the mid to upper single digits across the DC Metropolitan Area.

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