SPC Tornado Watch 770
Fri, 31 Dec 2010 11:47:02 -0600
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 770 NWS STORM PREDICTION CENTER NORMAN OK 1145 AM CST FRI DEC 31 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF FAR NORTHEAST ARKANSAS SOUTHERN ILLINOIS FAR WESTERN KENTUCKY SOUTHEAST MISSOURI WESTERN TENNESSEE EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1145 AM UNTIL 700 PM CST. TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF MOUNT VERNON ILLINOIS TO 40 MILES EAST SOUTHEAST OF WALNUT RIDGE ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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 767...WW 768...WW 769... DISCUSSION...PRE-FRONTAL BAND OF TSTMS FROM STL SWD TO NW OF BVX IS EXPECTED TO CONTINUE THROUGH THE AFTERNOON AND LIKELY INTENSIFY WHILE INTERACTING WITH A WARMING/MOISTENING BOUNDARY LAYER WITH MLCAPE APPROACHING 1500 J/KG /REF. 17Z LZK SOUNDING/. GIVEN THAT LLJ AXIS WILL REMAIN ALONG OR JUST E OF MS RIVER THROUGH THE DIURNAL HEATING CYCLE...MORE THAN SUFFICIENT VERTICAL SHEAR WILL EXIST FOR EMBEDDED SUPERCELL AND BOWING STRUCTURES CAPABLE OF DAMAGING WINDS...A FEW TORNADOES...AND PERHAPS SOME HAIL. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 24035. ...MEADRead more
SPC Tornado Watch 770 Status Reports
Fri, 31 Dec 2010 11:47:11 -0600
STATUS FOR WATCH 0770 HAS NOT BEEN ISSUED YETRead more
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