National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rain Possible Across the Central U.S.; Additional Flash Flooding Potential in the Mid-Atlantic

Strong thunderstorms are forecast across parts of the Central Plains and Midwest today with damaging wind gusts, large hail, and heavy rainfall the primary threats. Heavy rain and scattered flash flooding is also possible across the Carolinas into Virginia. Elevated to critical fire weather concerns in the Four Corners region as Extreme Heat Warnings remain in effect across the Desert Southwest. Read More >

Mesoscale Discussion #0637 issued at 2241 UTC 27 April 2011
MESOSCALE DISCUSSION 0637
NWS STORM PREDICTION CENTER NORMAN OK
0541 PM CDT WED APR 27 2011
   
AREAS AFFECTED...PARTS OF ERN AL...NRN/CENTRAL GA...AND WRN NC/SC
   
CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY 
   
VALID 272241Z - 272315Z
   
A NEW TORNADO WATCH IS BEING COORDINATED TO THE EAST OF WW/S 235 AND
238.  THIS NEW WATCH WILL LIKELY BE A PDS WATCH.
   
STRENGTHENING SLY LOW LEVEL WINDS /50-60 KT/ THIS EVENING ACROSS ERN
AL INTO CENTRAL/NRN GA TO WRN PARTS OF SC/NC WILL MAINTAIN A MOIST
AIR MASS /SURFACE DEWPOINTS RISING INTO THE MID 60S/ AND SUPPORTING
MLCAPE 1000-2000 J/KG.  THIS COMBINED WITH INCREASING SWLY MIDLEVEL
WINDS ATOP THE LOW LEVEL WINDS WILL SUPPORT STRONG EFFECTIVE BULK
SHEAR /50-70 KT/ FOR DISCRETE SUPERCELLS AS ACTIVITY NOW LOCATED
OVER AL AND ERN TN DEVELOPS DOWNSTREAM.
   
..PETERS.. 04/27/2011
   
   
ATTN...WFO...RNK...CAE...GSP...MRX...FFC...TAE...BMX...MOB...
   
LAT...LON   32358642 35008451 36218196 35998051 33778216 32098310
            31598390 31608645 32358642