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Mesoscale Discussion 0337
NWS Storm Prediction Center Norman OK
0535 PM CDT Sat Apr 11 2020
Areas affected...central/southeast Texas
Concerning...Severe potential...Watch unlikely
Valid 112235Z - 120030Z
Probability of Watch Issuance...20 percent
SUMMARY...Isolated convection in the region is in a favorable
environment for supercell development. Convective trends are being
monitored.
DISCUSSION...Recent satellite/radar imagery indicates the presence
of deepening convection mainly near Milam County, Texas, with other
updrafts just to the west (nearer I-35) and another one cell over
Harris County. These storms are likely resulting from subtle
low-level confluence amidst moderately unstable and weakly capped
thermodynamic profiles. Southeasterly low-level flow will maintain
near 70F dewpoints in that region while also maintaining sufficient
low-layer shear (350 m2/s2 0-3km SRH) and deep shear (45-55 kts) for
organization and updraft rotation.
The overall scenario supports maintainence of isolated convection in
this region through sunset at least - with an isolated tornado or
damaging wind threat with any organized storm given the environment.
The isolated nature of the threat should preclude a WW issuance,
though convective trends will continue to be monitored.
..Cook/Hart.. 04/11/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...HGX...FWD...EWX...
LAT...LON 31489729 31619651 31339591 30699536 30029528 29589586
29739747 30009783 30209789 30909779 31339748 31489729
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