THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN IOWA NORTH CENTRAL MISSOURI * EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1040 PM UNTIL 500 AM CDT. * PRIMARY THREATS INCLUDE... NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75 MPH POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST NORTHEAST OF FORT DODGE IOWA TO 10 MILES SOUTHEAST OF CHILLICOTHE MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 362...WW 364...WW 365...WW 366...WW 367...WW 368... DISCUSSION...TSTMS EXPECTED TO FORM LATER TNGT/EARLY WED IN ZONE OF STRENGTHENING WAA/MOISTURE TRANSPORT IN EXIT REGION OF 40+ SWLY LLJ AND BENEATH AMPLIFYING UPR IMPULSE. INITIAL STORMS SHOULD BE SLIGHTLY ELEVATED...AND WILL POSE A RISK FOR MAINLY LARGE HAIL AND POSSIBLY A TORNADO GIVEN UPSTREAM THERMODYNAMIC ENVIRONMENT FEATURING DEEP EML ATOP MOISTURE-RICH PBL /PER TOP AND OAX 00Z RAOBS/. SOME DEGREE OF MCS DEVELOPMENT DOES APPEAR LIKELY WITH TIME...HOWEVER...ESPECIALLY IN ERN IA AND PERHAPS NRN MO. THIS ACTIVITY COULD POSE AN INCREASING RISK FOR BOWING SEGMENTS/DMGG WIND. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 29030. ...CORFIDI
Posted on: Wed, 26 Jun 2013 03:50:54 +0000
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