Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0757 PM CDT Mon Apr 20 2026
Valid 210100Z - 211200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe storms are not expected through tonight.
...Discussion...
Scattered thunderstorms persist across central and southern TX this
evening, where southerly 850 mb winds are aiding lift/warm advection
atop the relatively cool boundary layer. In addition, a weak wave
aloft is moving across the southern Plains. As such, storms may
increase in coverage through tonight, expanding into northern and
eastern TX. Effective shear will remain weak especially over
northern areas, and severe storms are not expected.
Elsewhere, showers will generally decrease over far southern FL with
the loss of heating. Farther west, an isolated lightning flash
cannot be ruled out over parts of the WA/OR Cascades as an offshore
upper trough slowly pushes east.
..Jewell.. 04/21/2026
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