SPC AC 241707
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1107 AM CST Wed Nov 24 2021
Valid 251200Z - 261200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated thunderstorms are possible from the Texas Hill
Country/south Texas into the Arklatex region on Thursday, but
severe-storm potential is currently low.
...Synopsis...
An upper low over northwest Mexico will become cut-off from the
large-scale trough over the central U.S. on Thursday. This will
result in stronger deep-layer southwesterly flow remaining over the
Midwest as the upper trough pivots east toward the lower Great Lakes
and the southeastern U.S. coast by Friday morning. At the surface, a
cold front will extend from Lower MI to the TX Hill Country at the
beginning of the period.
Ahead of the cold front, isolated thunderstorms will likely be
ongoing from the TX Hill Country toward the Arklatex vicinity during
the morning. Mid 60s dewpoints will exist ahead of the front across
southeast into south TX, where modest destabilization will occur
through peak heating. A few strong storms are possible as convection
ahead of the front interacts with the modest warm sector before the
cold front moves offshore from the TX coast during the evening.
However, modest low/midlevel lapse rates, and weak shear from
roughly 1-3 km, will largely limit longevity/better-organized
updrafts, and severe potential appears low at this time.
..Leitman.. 11/24/2021
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