SPC AC 051717
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1117 AM CST Wed Jan 05 2022
Valid 061200Z - 071200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A few weak thunderstorms are possible Thursday across parts of the
Southeast.
...Synopsis...
A shortwave trough will likely extend across the middle and lower MO
Valley early Thursday morning, embedded within the broad cyclonic
flow aloft covering much of the central and eastern CONUS. This
shortwave is forecast to continue eastward throughout the day,
traversing the Mid MS Valley and much of the OH Valley. Strong
mid-flow (i.e. 100+ kt at 500 mb) will accompany this shortwave,
spreading across the Mid-South, TN Valley, and Mid-Atlantic during
the period. Dry and stable conditions will precede this shortwave
and attendant jet streak, precluding thunderstorm development.
Highest chance for thunderstorms appears to be ahead of a surface
low along a remnant frontal zone extending from southeast TX
northeastward through the Southeast. This low, which will likely be
centered near the northern LA/west-central MS border early Thursday,
is forecast to deepen slightly as it moves quickly northeastward
throughout the day. Forcing for ascent in the vicinity of this low
and its attendant cold front will likely lead to the development of
a line of shallow convection Thursday afternoon across southern MS,
central/southern AL, southwest GA, and the FL Panhandle. Guidance
currently shows relatively warm temperatures aloft, keeping much of
the buoyancy below the heights needs for lightning generation. A few
lightning flashes are still possible as well as some convectively
augmented downbursts. Very sparse coverage of any damaging wind
gusts is currently anticipated, precluding the introduction of any
severe probabilities with this outlook. A trend towards more
buoyancy could result in the need for probabilities in later
outlooks.
..Mosier.. 01/05/2022
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