National Weather Service United States Department of Commerce

Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. 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