THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHWEST IOWA SOUTWEST MINNESOTA MUCH OF NORTHERN AND CENTRAL NEBRASKA SOUTHERN AND WESTERN SOUTH DAKOTA * EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 605 PM UNTIL 100 AM CDT. * PRIMARY THREATS INCLUDE... SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE A FEW TORNADOES POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST NORTHWEST OF CHADRON NEBRASKA TO 60 MILES EAST SOUTHEAST OF SIOUX FALLS SOUTH DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7). 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 394...WW 395...WW 396... DISCUSSION...THUNDERSTORMS CONTINUE MOVING SOUTHEASTWARD ACROSS SOUTHEAST SOUTH DAKOTA INTO AN AXIS OF MODERATE INSTABILITY. MEANWHILE...STORMS ARE DEVELOPING FARTHER WEST -- ACROSS PARTS OF NORTHERN NEB...WHILE STILL OTHER/ISOLATED CELLS ARE ONGOING AS FAR NORTHWEST AS NORTHEAST WYOMING. AN ANTICIPATED INCREASE IN CONVECTIVE COVERAGE ACROSS THE WW THIS EVENING WITHIN AN AMPLY-SHEARED/FAVORABLY UNSTABLE ENVIRONMENT WILL RESULT IN A BROAD AREA EXPERIENCING POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS THROUGH THE EVENING HOURS...AS STORMS MOVE SOUTHEASTWARD WITH TIME ACROSS THE WW AREA. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29035. ...GOSS -SWC-
Posted on: Sun, 07 Jul 2013 23:12:36 +0000
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