SPC MD 1642

MD 1642 CONCERNING SEVERE THUNDERSTORM WATCH 472... FOR SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS...NORTHEAST TEXAS...NORTHERN LOUISIANA

Mesoscale Discussion 1642
NWS Storm Prediction Center Norman OK
1133 PM CDT Sat Aug 29 2020

Areas affected...southeast Oklahoma...southwest Arkansas...northeast
Texas...northern Louisiana

Concerning...Severe Thunderstorm Watch 472...

Valid 300433Z - 300600Z

The severe weather threat for Severe Thunderstorm Watch 472
continues.

SUMMARY...An MCS will gradually shift south across the Arklatex
area, with a continued threat of gusty winds and heavy rain.

DISCUSSION...An MCS with impressive IR presentation (cloud top
temperatures to -80 C) is approaching the Red River, overturning a
very moist and unstable air mass. Southwest winds at 850 mb will
favor continued inflow into this system as it propagates slowly
southward. Periodic strong to severe downdrafts remain possible. A
slight westward growth/expansion cannot be ruled out as pockets of
warmer air remain surrounding the Metroplex. However, additional
watches may not be necessary.

..Jewell.. 08/30/2020

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

ATTN...WFO...LZK...SHV...TSA...FWD...OUN...

LAT...LON   34069636 34269575 34539460 34409281 33729230 33469235
            32829329 32909462 33109602 33369625 33729644 34069636 

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from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1642.html