SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1258 AM CDT Mon Oct 26 2020

Valid 261200Z - 271200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Organized severe thunderstorms are not expected across the U.S.
mainland today or tonight.

...Southern Plains region...

A large area of CP high pressure will continue to build southward
through the Plains, pushing a cold front to near the TX coast by 12Z
Tuesday. The southwest-northeast oriented low-level baroclinic zone
north of the surface cold front will serve as a focus for
thunderstorm development this period. A southerly low-level jet will
strengthen tonight across the southern Plains downstream from an
upper trough amplifying across the Great Basin. Frontogenetic
forcing and isentropic ascent within the baroclinic zone will
contribute to the development of a corridor of scattered
thunderstorms across portions of TX into OK today, with another
round forecast for later tonight. Storms will remain elevated above
the stable surface layer, but some small to marginally severe hail
cannot be ruled out with initial burst of storms early in the
period, mainly across a portion of west TX where somewhat greater
instability and steeper lapse rates will reside.

..Dial.. 10/26/2020

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