SPC MD 2136



MD 2136 CONCERNING SEVERE THUNDERSTORM WATCH 689… FOR PORTIONS OF COASTAL SOUTH CAROLINA

MD 2136 Image

Mesoscale Discussion 2136
NWS Storm Prediction Center Norman OK
0658 PM CDT Thu Oct 31 2019

Areas affected...Portions of coastal South Carolina

Concerning...Severe Thunderstorm Watch 689...

Valid 312358Z - 010100Z

The severe weather threat for Severe Thunderstorm Watch 689
continues.

SUMMARY...Storms are expected to gradually weaken as they move east
of WW689 across coastal portions of South Carolina. WW689 will
likely be allowed to expire prior to its scheduled 0100Z expiration
time.

DISCUSSION...Latest regional radar imagery suggests thunderstorms
have been undergoing a gradual weakening trend over the last hour or
so across eastern portions of Severe Thunderstorm Watch 689. While a
few strong thunderstorms may move east of the watch area -- where
modest instability (near 1000-1500 J/kg) and strong effective bulk
shear remains (near 50 kts) -- decreasing ascent as the mid-level
shortwave trough moves farther northeast of the area should allow
for thunderstorm intensity to continue decreasing across coastal
South Carolina. WW689 will likely be allowed to expire prior to its
scheduled 0100Z expiration times as storms move out of the watch
area.

..Elliott.. 10/31/2019

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

ATTN...WFO...ILM...CHS...CAE...

LAT...LON   32278072 32358101 32698121 33518081 34028029 34008012
            33797889 33437888 32887945 32398029 32278072 

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