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    Day 2 Outlook >
Dec 13, 2017 0600 UTC Day 1 Convective Outlook
Click to see valid 1Z - 12Z Day 1 Convective Outlook
Updated: Wed Dec 13 04:36:58 UTC 2017 (Print Version | 20171213 1200Z Day 1 shapefile | 20171213 1200Z Day 1 KML)
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 Forecast Discussion
   SPC AC 130436

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1036 PM CST Tue Dec 12 2017

   Valid 131200Z - 141200Z

   ...NO THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Thunderstorms are not forecast across the contiguous states on
   Wednesday and Wednesday night.

   ...Discussion...

   The persistent high-amplitude ridge-trough pattern across the United
   States will undergo slight modification on Wednesday as a shortwave
   trough crests the western ridge and digs into the Great Basin. As
   this occurs, the western ridge will build northward, helping to
   carve out a broader downstream trough across the eastern united
   States. At the surface, a fresh intrusion of cool, dry continental
   air will push south and east across areas east of the Rockies.

   Subsidence beneath the western ridge and a reinforced continental
   airmass across the East will maintain a dry atmosphere across the
   contiguous United States. As a result, thunderstorms are not
   expected Wednesday or Wednesday night.

   ..Marsh.. 12/13/2017

   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z

        
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Page last modified: December 13, 2017
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