ZCZC SPCSWOMCD ALL
ACUS11 KWNS 282241 
SPC MCD 282241 
TXZ000-290045-

Mesoscale Discussion 0457
NWS Storm Prediction Center Norman OK
0541 PM CDT Wed Apr 28 2021

Areas affected...Southwest Texas

Concerning...Tornado Watch 120...

Valid 282241Z - 290045Z

The severe weather threat for Tornado Watch 120 continues.

SUMMARY...A severe threat will continue through early this evening
across parts of southwest Texas. Very large hail, wind damage and a
tornado or two will be possible.

DISCUSSION...The latest radar imagery out of Del Rio shows a cluster
of severe storms located from just southeast of Del Rio extending
westward into the far northern Mexico. The storms will continue to
move eastward along a corridor of moderate instability over the next
few hours. The RAP is showing MLCAPE in the 2500 to 3000 J/kg range
from near Del Rio extending eastward into the southern Texas Hill
Country. The RAP suggests that 700-500 mb lapse rates are near 7.0
C/km. This combined 0-6 km shear in the 50 to 60 kt range, evident
on the WSR-88D VWP, will be favorable for supercells with large
hail. Hailstones of greater than 2 inches in diameter will be
possible with the stronger updrafts. As low-level flow strengthens
early this evening, a tornado threat is expected to develop. Wind
damage can also be expected along the leading edge or within the
stronger downdrafts.

..Broyles.. 04/28/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...EWX...

LAT...LON   29520117 29190128 28980103 28670016 28759916 29379851
            29829836 30069877 30029982 29830048 29520117 

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