SPC MD 1603

MD 1603 CONCERNING TORNADO WATCH 458... FOR NORTHEAST ARKANSAS...WESTERN TENNESSEE...MISSOURI BOOTHEEL

Mesoscale Discussion 1603
NWS Storm Prediction Center Norman OK
0829 PM CDT Thu Aug 27 2020

Areas affected...northeast Arkansas...western Tennessee...Missouri
Bootheel

Concerning...Tornado Watch 458...

Valid 280129Z - 280330Z

The severe weather threat for Tornado Watch 458 continues.

SUMMARY...The risk for an isolated tornado may persist for a few
more hours across a small part of northeast Arkansas, western
Tennessee, northern Mississippi, and the Missouri Bootheel.

DISCUSSION...A long-lived arcing band of storms with periodic areas
of rotation continues to expand north/northeastward away from the
center of Laura. Pressure falls are noted ahead of the line, along
with 0-1 SRH now down into the 200-300 m2/s2 range. The air mass
remain very moist, and sufficiently unstable to support isolated
severe storms and capable of strong wind gusts and brief tornadoes.

The boundary layer will continue to gradually cool this evening,
which will reduce buoyancy overall. In the near term, the greatest
relative risk appears to be from Lawrence County AR southeastward
into northern MS.

..Jewell.. 08/28/2020

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

ATTN...WFO...PAH...MEG...LZK...

LAT...LON   34348981 34888987 35589048 35799085 35899154 36069158
            36229142 36599033 36708953 36488922 35598938 34918943
            34468961 34348981 

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from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1603.html