Thursday, April 5, 2012

WATCHES: Severe Thunderstorm Watch Number 148

WWUS20 KWNS 051900
SEL8
SPC WW 051900
ALZ000-FLZ000-GAZ000-060200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 148
NWS STORM PREDICTION CENTER NORMAN OK
300 PM EDT THU APR 5 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHEAST ALABAMA
CENTRAL AND EASTERN FLORIDA PANHANDLE
WEST-CENTRAL AND SOUTHWEST GEORGIA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
1000 PM EDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH
NORTHWEST OF MACON GEORGIA TO 15 MILES SOUTH SOUTHEAST OF PANAMA
CITY FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 143...WW 144...WW
145...WW 146...WW 147...

DISCUSSION...BOWING MCS FROM E-CNTRL INTO SRN AL IS EXPECTED TO
CONTINUE ESEWD THIS AFTERNOON INTO EVENING IN ADVANCE OF VORTICITY
MAXIMUM PIVOTING NEWD INTO THE TN VALLEY. WIDESPREAD CLOUDS AND
DISRUPTION OF MOIST INFLOW BY CONVECTION OVER THE NERN GOM HAVE
TEMPERED DESTABILIZATION OF AIR MASS DOWNSTREAM FROM MCS.
NONETHELESS...THE PRESENCE OF MLCAPE OF 500-1500 J/KG AND 45-60 KT
OF DEEP WLY SHEAR WILL STILL BE SUPPORTIVE OF FORWARD-PROPAGATION OF
BOWING SYSTEM WITH AN ATTENDANT RISK FOR DAMAGING WINDS AND SOME
HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28030.


...MEAD

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