LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1159 PM CST Sat Nov 19 2022
Valid 201200Z - 211200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated thunderstorms will be possible today across parts of
south-central Texas and south Florida. Isolated lightning strikes
may occur in the vicinity of Lake Ontario.
...DISCUSSION...
A large-scale cyclonic flow pattern will be in place today across
much of the central and eastern U.S. An upper-level trough will dig
southeastward into the mid to upper Mississippi Valley. At the
surface, a dome of high pressure will settle into the Great Plains.
The cool and dry airmass along with northerly flow will impede
moisture return across the continental United States. This will make
conditions unfavorable for thunderstorm development in most areas. A
few exceptions will exist. The first will be in south-central Texas,
where warm advection may be enough for an isolated storm or two. The
second will be in south Florida, where isolated storms could develop
in a moist airmass. The third will be in the vicinity of Lake
Ontario in association with lake-effect snowbands. Elsewhere across
the continental United States, thunderstorms are not expected.
..Broyles/Squitieri.. 11/20/2022
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