The Good Friday Severe Weather Outbreak of April 10, 2009

Heavy Rainfall in the East Wednesday; Hot Temperatures Continue in Coastal Southern California

Heavy to excessive rainfall may lead to flooding Wednesday over southwest Pennsylvania into northern West Virginia, and western Maryland. Flood Watches have been issued. An extended period of hot weather will continue for parts of coastal southern California including Los Angeles through Thursday. Heat Advisories remain in effect. Read More >

MESOSCALE DISCUSSION 0438 NWS STORM PREDICTION CENTER NORMAN OK 0634 PM CDT FRI APR 10 2009 AREAS AFFECTED...CNTRL AL...NRN/CNTRL GA...UPSTATE SC CONCERNING...TORNADO WATCH 134...135... VALID 102334Z - 110030Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 134...135...CONTINUES. SEVERAL DISCRETE SUPERCELLS ALONG WITH SHORT-LINE SEGMENTS SHOULD PROGRESS E/SEWD ACROSS SERN PORTION OF WW 134 INTO WW 135. LOCAL AREAL EXTENSION MAY BE NEEDED ALONG THE SRN PERIPHERY OF WW 134 IN AL. THREATS OF LARGE HAIL AND TORNADOES /A FEW OF WHICH COULD BE SIGNIFICANT/...AND DAMAGING WINDS WILL CONTINUE. AS OF 2330Z...NUMEROUS DISCRETE SUPERCELLS HAVE EVOLVED INTO CNTRL/E-CNTRL AL AND NWRN GA...WITH A SHORT LINE SEGMENT CONSISTING OF EMBEDDED SUPERCELLS ACROSS N-CNTRL GA. DESPITE THE ONSET OF STABILIZATION WITH LOSS OF DAYTIME HEATING...A SWLY INFLUX OF UPPER 50S TO LOWER 60S SURFACE DEW POINTS SHOULD HELP OFFSET THIS TENDENCY TO SOME EXTENT. MEANWHILE...AREA VWPS INDICATE A GRADUAL STRENGTHENING TREND IN LOWER-LEVEL FLOW WHICH IS ENLARGING ALREADY VERY FAVORABLE HODOGRAPHS FOR UPDRAFT ROTATION. AS SUCH...SIGNIFICANT SEVERE POTENTIAL IS EXPECTED TO CONTINUE THROUGH ABOUT 02-03Z. ..GRAMS.. 04/10/2009 ATTN...WFO...CAE...GSP...FFC...BMX... LAT...LON 32288612 32378751 32738739 33158667 33908593 34268490 34368377 34888281 35148226 35138134 34928092 34498107 33338211 32798288 32428409 32278476 32288612