LIVE MAP (ABOVE) ... SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1240 AM CDT Thu Apr 20 2023
Valid 211200Z - 221200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE TEXAS COASTAL PLAIN...LOWER MISSISSIPPI VALLEY AND CENTRAL GULF
COAST...
...SUMMARY...
Marginally severe thunderstorms associated with isolated damaging
winds and hail will be possible on Friday from parts of the Texas
Coastal Plain east-northeastward into the central Gulf Coast states.
...Texas Coastal Plain/Lower Mississippi Valley/Central Gulf
Coast...
An upper-level trough will move across the southern Plains on
Friday, as an associated 60 to 80 knot mid-level jet digs
southeastward into the southern Plains. At the surface, a cold front
will advance southeastward across the Texas Coastal Plain and lower
Mississippi Valley. At the start of the period, the front is
forecast to be in the Texas Hill Country and Ark-La-Tex. Scattered
thunderstorms will likely be ongoing across the moist sector in
parts of east Texas and Louisiana. The stronger cells could have an
isolated wind-damage and hail threat. Some models suggest the storm
cluster will move eastward toward the central Gulf coast during the
morning. This would likely hamper destabilization across parts of
the lower Mississippi Valley. Further to the west, moderate
instability is forecast across much of the Texas Coastal Plain by
late morning. Isolated to scattered thunderstorms may develop near
the front or in the post-frontal airmass during the afternoon.
Moderate deep-layer shear and steep low-level lapse rates could
result in an isolated wind-damage threat. However, cold air
advection in the wake of the front will likely decrease instability
across the Texas Coastal Plain during the mid to late afternoon,
minimizing any severe threat.
..Broyles.. 04/20/2023
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