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Mesoscale Discussion 0429
NWS Storm Prediction Center Norman OK
0625 PM CDT Tue Apr 21 2020
Areas affected...Central Texas
Concerning...Severe potential...Watch unlikely
Valid 212325Z - 220100Z
Probability of Watch Issuance...20 percent
SUMMARY...An isolated threat of severe weather exists across central
Texas this evening. A weather watch is unlikely.
DISCUSSION...A couple of stronger updrafts have recently developed
along a bulging dryline through central Texas. These storms have
formed at the nose of deeper surface moisture with dewpoints in the
lower to middle 60s F and temperatures in the 80s F. The warm and
moist conditions underneath mid-level lapse rates of 7-8 C/km are
supporting MLCAPE of 2000-2500 J/kg. 50 to 55 kt of 0-6 km bulk
shear will support storm organization with a supercell mode likely.
An isolated severe weather threat of mainly damaging winds and large
hail will be possible with these storms through this evening. The
longevity of the severe threat is expected to be short lived with
greater inhibition indicated by mesoanalysis to the east. Storms may
persist for an hour or so after sunset but the limited time frame
and spatial extent of the severe threat likely precludes watch
issuance at this time.
..Lyons/Grams.. 04/21/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...FWD...SJT...
LAT...LON 32870044 32899960 32719871 31639854 31019892 30979956
31070028 31230050 32090022 32870044
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