Winter Storm To Bring Snow And Arctic Cold Back to West Tennessee
Weather Update: Tuesday, February 18 —
Good morning West Tennessee. A cold start to our day along with partly to mostly cloudy skies. It will be cloudy later regardless. There’s a lot going on today, but I think if you have plans during the day time hours there wont be any immediate issues. The Winter Storm Warning and Winter Weather Advisory will go into effect today at lunch time (12:00 PM) this however is NOT the start time of the snow. I have that timed out in the graphics on the video ( and below), please refer to that for your respective counties.
Once snow starts after 4:00 PM for most evaporative cooling will begin driving temperatures down. At the surface arctic air will start to drain further south as clipper deepens an slides by just to the south of the TN Valley. Snow ratios at onset will be around 9-10:1 however by midnight from north to south the ratios will increase substantially, thereby improving the snows accumulating efficiency from north to south. There may be some sleet mixing in at times south of I-40, that will cut into snowfall totals, see my snow map in the video.
Brutal Cold Air will be filtering in off a NE wind during the event, this will drive wind chills into the single digits tonight, and likely into the negative single digits by tomorrow morning. NWS Memphis has issued a Cold Weather Advisory in response for all of West Tennessee set to begin at 9:00 PM Tonight through 11:00 AM Wednesday.
Storm Team Meteorologist
Moe Shamell
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