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...
Thunderstorms are not forecast across the contiguous states on
Wednesday and Wednesday night.
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.
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NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z