Epic Outbreak of Tornadoes Across the Southeast on 27-28 April 2011 Impacts Northeast Georgia and Western North Carolina

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

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