|Mesoscale Discussion 858|
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Mesoscale Discussion 0858
NWS Storm Prediction Center Norman OK
0354 AM CDT Sat May 27 2017
Areas affected...parts of southern Missouri and northern Arkansas
and into western parts of Kentucky and Tennessee
Concerning...Severe Thunderstorm Watch 272...
Valid 270854Z - 271100Z
The severe weather threat for Severe Thunderstorm Watch 272
SUMMARY...Storms continue to gradually increase/organize into a
small MCS over the AR/MO border region, with ongoing/local severe
risk. New/downstream WW appears likely to be necessary.
DISCUSSION...Latest radar loop shows a cluster of storms that
appears to be evolving into a small MCS over Howell County MO and
adjacent Fulton and Izard Counties in Ar, and trailing west to
Marion County AR.
With an amply unstable airmass extending east to/across the
mid-Mississippi Valley, and given the convection's co-location with
a weak/mobile center of cyclonic circulation evident in water vapor
imagery, expect that storms -- and likely a local severe risk --
will continue east of the existing watch. As such, new WW appears
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 35899236 35969283 36149322 36369332 36569305 36769251
37259148 37379002 37278931 36728897 35728932 35509023
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