SPC Severe Thunderstorm Watch 690
Mon, 04 Oct 2010 14:05:03 -0500
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 690 NWS STORM PREDICTION CENTER NORMAN OK 105 PM MDT MON OCT 4 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF PART OF NORTHWEST ARIZONA PARTS OF SOUTHEAST CALIFORNIA PARTS OF SOUTHERN NEVADA SMALL PART OF SOUTHWEST UTAH EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 105 PM UNTIL 800 PM MDT. HAIL TO 2 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 115 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF CEDAR CITY UTAH TO 65 MILES SOUTHWEST OF NEEDLES CALIFORNIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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. DISCUSSION...THUNDERSTORMS ARE INCREASING IN NUMBER AND INTENSITY ACROSS THE WATCH AREA IN ADVANCE OF DEEPENING UPPER TROUGH OVER CA. GIVEN THE STEEP LAPSE RATES AND MLCAPES TO 1000 J/KG...SEVERE THUNDERSTORMS WILL BE A POSSIBILITY THROUGH THE AFTERNOON. PRIMARY THREAT WILL BE LARGE HAIL AND BRIEF DAMAGING WINDS. AVIATION...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 22025. ...HALESRead more
SPC Severe Thunderstorm Watch 690 Status Reports
Mon, 04 Oct 2010 14:05:12 -0500
STATUS FOR WATCH 0690 HAS NOT BEEN ISSUED YETRead more
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