Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0751 PM CDT Tue Oct 20 2026
Valid 210100Z - 211200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A severe threat is not forecast across the U.S. through tonight.
...DISCUSSION...
An upper-level low will move toward the coast of California this
evening as south-southwesterly flow aloft remains in place over the
Desert Southwest. Ahead of this system, instability will be
sufficient for thunderstorm development this evening into tonight
across parts of the Desert Southwest and Intermountain West.
Thunderstorms will also be possible tonight along and near an axis
of low-level moisture over the southern and central Great Plains. No
severe threat is forecast across the continental U.S. through
daybreak Wednesday.
..Broyles.. 10/21/2026
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