Storm Prediction Center issues Mesoscale Discussion #993 concerning SEVERE THUNDERSTORM WATCH 317...318...321997
ACUS11 KWNS 262323
SWOMCD
SPC MCD 262322
VAZ000-PAZ000-MDZ000-WVZ000-OHZ000-270045-
Mesoscale Discussion 0993
NWS Storm Prediction Center Norman OK
0622 PM CDT Sun May 26 2024
Areas affected...Eastern OH...western PA...western MD...eastern
WV...central VA
Concerning...Severe Thunderstorm Watch 317...318...321...
Valid 262322Z - 270045Z
The severe weather threat for Severe Thunderstorm Watch 317, 318,
321 continues.
SUMMARY...Some damaging-wind potential will spread northeastward
through the evening.
DISCUSSION...A loosely organized QLCS with a history of producing
some wind damage is moving across eastern OH/western PA into parts
of eastern WV/central VA. While midlevel lapse rates are weak and
instability gradually decreases with eastward extent, earlier
diurnal heating resulted in some steepening of low-level lapse
rates, and MLCAPE may remain around 500 J/kg in advance of the line
this evening, though with gradually increasing MLCINH. The QLCS will
likely continue to remain somewhat organized until decreasing
instability and increasing inhibition becomes prohibitive later this
evening.
Rather strong low-level flow (noted on regional VWPs) will continue
to support some wind-damage potential with this QLCS as it advances
northeastward. Some threat may eventually spread out of WW 318 and
WW 321 into central PA, western MD, and northern/central VA, though
the need for additional watch issuance remains uncertain.
..Dean/Smith.. 05/26/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...AKQ...CTP...LWX...RNK...PBZ...RLX...CLE...
LAT...LON 37287955 39128015 40948107 41138111 41618053 41427948
39667867 37617818 37257851 37247927 37287955
Source:
Storm Prediction Center issues Mesoscale Discussion #993 concerning SEVERE THUNDERSTORM WATCH 317...318...321---------------
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