SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1124 PM CST Wed Dec 09 2020

Valid 101200Z - 111200Z


Organized severe thunderstorms are not forecast across the
contiguous United States through tonight.

A mid-level low/trough near the Sonora/Arizona border will weaken
during the day as it moves east across the southern Rockies and into
the southern High Plains by daybreak Friday.  In the low levels,
limited surface reflection in the form of a weak low is progged over
the southern Great Plains primarily during the latter half of the
period.  Clusters of clouds and showers are forecast over the Desert
Southwest today.  Pockets of weak instability associated with cold
mid-level temperatures will promote isolated thunderstorms from AZ
eastward into NM.  By this evening, strengthening 850-700 mb warm
advection will gradually spur the development of showers and perhaps
a few widely spaced thunderstorms from the southern High Plains
eastward into central and northern parts of TX/OK late overnight. 
Scant instability will preclude strong storms.

..Smith/Lyons.. 12/10/2020

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