Houston, TX...Shreveport, LA...Mobile, AL...Beaumont, TX...Wichita Falls, TX...
2 %
164,968
21,191,625
San Antonio, TX...Dallas, TX...Austin, TX...Fort Worth, TX...Oklahoma City, OK...
Probabilistic Damaging Wind Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Shreveport, LA...Fort Smith, AR...Fayetteville, AR...Bossier City, LA...Springdale, AR...
SPC AC 240050
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0750 PM CDT Fri Apr 23 2021
Valid 240100Z - 241200Z
...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE RED RIVER VALLEY AREA...AND FROM SOUTHEASTERN TEXAS EAST TO
SOUTHERN ALABAMA...
...SUMMARY...
Damaging wind gusts, large to very large hail, and a few tornadoes
remain possible tonight across parts of the southern Plains to lower
Mississippi Valley areas.
...Discussion...
A well-defined mid-level short-wave trough will continue moving
across the southern Plains tonight, with large-scale ascent
continuing to help support widespread convection. Several clusters
of strong/severe storms are ongoing at this time, including in the
vicinity of the Red River Valley of southwestern Oklahoma and
western North Texas near the main vort max aloft, across central and
south Texas near the dryline, and over the Sabine River Valley area
within a zone of low-level theta-e advection.
As the evening wears on, eastward advance of the upper system and
some stabilization of the boundary layer should eventually lead to a
gradual wane in storm intensity over the southern Plains. Until
then, large hail and locally damaging winds remain possible, along
with a tornado or two.
The more substantial/corridor for continuing/overnight storms/severe
potential will likely evolve from the southeastern Texas vicinity
eastward. As low-level warm/moist advection increases in tandem
with a rapidly strengthening low-level jet in the vicinity of the
lower Mississippi Valley, a weak west-to-east warm front will become
more sharply defined from central Louisiana across southern parts of
Mississippi and Alabama, while shifting very slowly northward with
time. This boundary is expected to become a focus for multiple
rounds/bands of strong/severe storms, including potential for
rotating cells and bowing clusters. While some hail will be
possible, primary risks are for damaging winds and a few tornadoes,
with risk spreading eastward and likely continuing through the end
of the period.
..Goss.. 04/24/2021
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z
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