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Mesoscale Discussion 1082
NWS Storm Prediction Center Norman OK
0444 PM CDT Thu Jul 02 2020
Areas affected...Southwest Missouri and eastern Oklahoma into
central Arkansas and far west Mississippi
Concerning...Severe potential...Watch unlikely
Valid 022144Z - 022345Z
Probability of Watch Issuance...20 percent
SUMMARY...Continued thunderstorm development is possible from
northwest Arkansas into southeast Arkansas and associated with
ongoing MCSs across western Mississippi and east/southeast Oklahoma.
Occasional strong down burst winds will be possible with these
storms.
DISCUSSION...Recent surface observations show a diffuse frontal
boundary draped from southwest Missouri southeastward into southeast
Arkansas. Meanwhile, ongoing MCSs across east/southeast Oklahoma and
far western Mississippi continue to propagate to the south and west,
respectively, within a weak shear, but high MLCAPE (3000-4000 J/kg),
environment. Additional thunderstorm development is possible along
the frontal zone given weak surface convergence and outflow
boundaries from ongoing convection, and MCS maintenance appears
likely prior to sunset and low-level stabilization. Additionally,
the developing cluster of storms across southwest MO should become
somewhat more organized as it continues to move into the more
unstable air mass to the south/southeast. Despite the unfavorable
wind environment for organized convection, steep low level lapse
rates between 7-8 C/km remain in place across the greater AR region.
Given the expected pulse-type nature of the storms and favorable
low-level thermodynamic environment, occasional strong down burst
winds will be possible. Due to the expected isolated nature of the
threat, a watch is not likely.
..Moore/Thompson.. 07/02/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...MEG...JAN...LZK...SGF...SHV...TSA...ICT...OUN...
LAT...LON 37509492 37309359 36299190 34849091 33709052 32489036
32229077 33289188 34129265 34469379 34149555 34239732
34879707 35439538 36249510 36899515 37509492
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