Thursday, January 10, 2008

Tornado Watch - Alabama


Particularly Dangerous Situation (PDS) Tornado Watch 17

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 17
NWS STORM PREDICTION CENTER NORMAN OK
1135 AM CST THU JAN 10 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF MUCH OF WESTERN AND NORTHERN ALABAMA PARTS OF SOUTHEAST LOUISIANA PARTS OF EASTERN MISSISSIPPI MUCH OF MIDDLE TENNESSEE COASTAL WATERS EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1135 AM UNTIL 700 PM CST.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST SOUTHWEST OF BOOTHVILLE LOUISIANA TO 50 MILES NORTHEAST OF NASHVILLE TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND 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.
OTHER WATCH INFORMATION...CONTINUE...WW 16...
DISCUSSION...WARM SECTOR HAS CONTINUED TO DESTABILIZE AS SHEAR PROFILES CONTINUE TO INTENSIFY ACROSS MUCH OF WATCH AREA. DISCRETE SUPERCELLS ARE DEVELOPING AHEAD OF THE MAIN AREA OF SEVERE OVER WRN MS/TN. AS 500MB TROUGH AND 100KT WIND MAX ROTATE TOWARD AREA THIS AFTERNOON...TORNADIC SUPERCELLS ARE EXPECTED TO INCREASE IN NUMBER AND DEVELOP EWD ACROSS AL AND NWD INTO MID TN. THERE IS A THREAT OF LONG LIVED SUPERCELLS INCLUDING STRONG TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24040. ...HALES

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