SPC Severe Thunderstorm Watch 678
Tue, 21 Sep 2010 13:57:02 -0500
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 678 NWS STORM PREDICTION CENTER NORMAN OK 155 PM CDT TUE SEP 21 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN IOWA FAR WEST-CENTRAL ILLINOIS NORTHERN MISSOURI EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 155 PM UNTIL 900 PM CDT. 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 65 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTH OF KANSAS CITY MISSOURI TO 20 MILES NORTHEAST OF KIRKSVILLE MISSOURI. 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 676...WW 677... DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY THIS AFTERNOON AHEAD OF WELL-DEFINED VORTICITY MAXIMUM CURRENTLY OVER NERN KS/SERN NEB. AMBIENT WARM SECTOR AIR MASS IS WARM AND MOIST WITH MLCAPE VALUES OF 1500-2500 J/KG. WHILE REGION RESIDES ALONG SRN FRINGE OF STRONGER MID AND HIGH-LEVEL FLOW ATTENDANT TO UPPER GREAT LAKES TROUGH...AREA PROFILER DATA INDICATE SUFFICIENT DEEP SWLY SHEAR TO SUPPORT ORGANIZED MULTICELLS AND BOWING STRUCTURES CAPABLE OF DAMAGING WINDS AND 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 26030. ...MEADRead more
SPC Severe Thunderstorm Watch 678 Status Reports
Tue, 21 Sep 2010 13:57:11 -0500
STATUS FOR WATCH 0678 HAS NOT BEEN ISSUED YETRead more
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