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Dec 1, 2020 0830 UTC Day 3 Severe Thunderstorm Outlook
Updated: Tue Dec 1 07:41:43 UTC 2020 (Print Version | 20201201 0830Z Day 3 shapefile | 20201201 0830Z Day 3 KML)
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 Forecast Discussion
   SPC AC 010741

   Day 3 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0141 AM CST Tue Dec 01 2020

   Valid 031200Z - 041200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Isolated thunderstorms are possible across portions of the Lower
   Mississippi Valley and Southeast on Thursday.

   ...Synopsis...
   At the beginning of the period, a pair of upper lows, one centered
   over northeast OK and the other over the central NM/AZ, are expected
   to be embedded within an elongated upper trough extending from the
   Mid MS Valley through the Southwest. This upper troughing will
   likely be maintained throughout the period as the easternmost upper
   low devolves into an open wave and moves across the Mid MS Valley
   into the Lower OH Valley. Enhanced mid-level flow attendant to this
   upper low/shortwave will spread northeastward from the Southern
   Plains through the OH Valley.

   The surface low associated with the eastern upper low is forecast to
   begin the period over eastern OK. This low is expected to fill
   throughout the day while a secondary low develops farther south over
   the Lower MS Valley. Upper 50s/low 60s dewpoints are anticipated
   ahead of this secondary low and attendant cold front. Daytime
   heating will be tempered by abundant cloud cover, but enough
   low-level moisture is expected to be in place to support modest
   instability and the development of isolated thunderstorms. This
   instability will likely be displaced south of the stronger low-level
   and mid-level flow, limiting vertical shear and keeping severe
   potential very low.

   ..Mosier.. 12/01/2020

   CLICK TO GET WUUS03 PTSDY3 PRODUCT

   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0830Z

        
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Page last modified: December 01, 2020
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