URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 560 NWS STORM PREDICTION CENTER NORMAN OK 930 AM CST TUE DEC 23 2014 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF SOUTHWEST ALABAMA LOUISIANA SOUTHERN AND CENTRAL MISSISSIPPI FAR SOUTHEAST TEXAS COASTAL WATERS * EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 930 AM UNTIL 600 PM CST. * PRIMARY THREATS INCLUDE... A FEW TORNADOES POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES NORTH NORTHEAST OF MOBILE ALABAMA TO 30 MILES WEST OF LAKE CHARLES LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && DISCUSSION...TSTMS EXPECTED TO GRADUALLY INCREASE IN COVERAGE/STRENGTH OVER WW AREA THROUGH LATER TODAY AS REGION OF LOW-LVL MOISTENING IS GLANCED BY LEAD IMPULSE /NOW IN CNTRL TX/ ASSOCIATED WITH BROAD...CNTRL U.S. UPR TROUGH. LOW-LVL FORCING WILL REMAIN WEAK/FRAGMENTED...PRIMARILY ALONG NUMEROUS SSW-NNE CONFLUENCE AXES. AT THE SAME TIME...LARGE-SCALE FORCING FOR ASCENT WILL BE MODEST. BUT COUPLED WITH FAIRLY EXPANSIVE AREA OF RETURNING MOISTURE BENEATH A BROAD EML AND WITH AMPLE SWLY DEEP SHEAR FOR SUPERCELLS...OVERALL SETUP YIELDS A SIZABLE AREA WITH A COMPARATIVELY UNFOCUSED...BUT APPRECIABLE...RISK FOR OCCASIONAL TORNADOES...SVR HAIL...AND LOCALLY DMGG WIND. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 23035.
Posted on: Tue, 23 Dec 2014 20:19:31 +0000
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