|Mesoscale Discussion 137|
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Mesoscale Discussion 0137
NWS Storm Prediction Center Norman OK
0755 PM CDT Sun Mar 18 2018
Areas affected...south central through southeast Texas
Concerning...Severe Thunderstorm Watch 11...
Valid 190055Z - 190230Z
The severe weather threat for Severe Thunderstorm Watch 11
SUMMARY...Storms will continue to pose a threat for isolated large
hail and damaging wind gusts next couple hours primarily from a
portion of south central through southeast Texas.
DISCUSSION...Storms that developed earlier this afternoon are in the
process of evolving into a cluster with embedded supercells from
south central through southeast TX. Storms will continue east next
couple hours. However, 00Z RAOBS from Shreveport and Lake Charles
show a modest capping inversion near 800 mb suggesting increased
surface-based convective inhibition with onset of nocturnal cooling.
Thus while the storms will continue to pose a severe threat next
couple hours, a weakening trend will probably commence by 03Z.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 31149548 31869470 31699396 31019366 30439396 30179484
30069602 30489632 31149548
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