SPC MD 996



MD 0996 CONCERNING SEVERE THUNDERSTORM WATCH 331… FOR PORTIONS OF CENTRAL MO INTO WESTERN IL

MD 0996 Image

Mesoscale Discussion 0996
NWS Storm Prediction Center Norman OK
0601 PM CDT Wed Jun 05 2019

Areas affected...portions of central MO into western IL

Concerning...Severe Thunderstorm Watch 331...

Valid 052301Z - 060030Z

The severe weather threat for Severe Thunderstorm Watch 331
continues.

SUMMARY...Damaging wind potential may be increasing across portions
of central MO into western IL.

DISCUSSION...Latest surface analysis showed a cold pool developing
in the wake of convection across northeast MO into western IL. Ahead
of the line, temperatures from the upper 80s to low 90s were noted,
while temperatures from the upper 60s to the lower 70s were observed
in the rain-cooled environment behind the line. The line will be
moving toward a very unstable airmass with surface dewpoints in the
70-75 deg F range and low level southwesterly winds around 10-20 kt.
Additionally, latest VWP data from KLSX showed westerly winds
increasing to around 30-40 kt above 3 km. This thermodynamic and
kinematic environment will continue to foster an organized line of
storms with increasing potential for damaging winds as the line
shifts southward over the next few hours. Evidence of this increase
in potential has also been noted in recent radar imagery across
east-central MO just north of the I-70 corridor where convection has
begun to bow and surge southward at around 35-40 kt. As such, expect
damaging wind potential could be increasing across parts of central
MO into the STL Metro-East vicinity of western IL over the next
couple of hours.

..Leitman.. 06/05/2019

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...PAH...LSX...

LAT...LON   39098987 38958946 38728906 38408909 38168946 38068995
            38149029 38259100 38429168 38689221 38879235 39209232
            39459211 39519167 39419092 39129001 39098987 

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