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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 234

NWS STORM PREDICTION CENTER NORMAN OK

455 PM CDT THU JUN 5 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN IOWA

  SOUTHWEST MINNESOTA

  EASTERN NEBRASKA

  SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 455 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF REDWOOD

FALLS MINNESOTA TO 20 MILES SOUTHEAST OF OMAHA NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 230...WW 231...WW

232...WW 233...



DISCUSSION...SCTD TSTMS MAY CONTINUE TO FORM ALONG AND E OF WEAK

INVERTED TROUGH OVER THE MID MO VLY REGION...WHERE DESTABILIZATION

HAS BEEN ENHANCED BY SFC HEATING AND ASCENT PROVIDED BY FAIRLY

POTENT MID-LVL TROUGH. 30-40 KT W TO WNWLY MID-LVL FLOW ASSOCIATED

WITH TROUGH...COUPLED WITH WEAK SSELY LOW-LVL WINDS AHEAD OF THE SFC

TROUGH...HAS YIELDED WIND PROFILES SUPPORTIVE OF A FEW LONGER-LIVED

UPDRAFTS/WEAK SUPERCELLS. GIVEN HIGH BOUNDARY LAYER RH E OF THE SFC

TROUGH AND WEAK LOW-LVL FORCING...SETUP MAY SUPPORT A FEW MORE

DISCRETE STORMS CAPABLE OF SVR HAIL...LOCALLY DMGG WIND

AND...ESPECIALLY NEAR BOUNDARY INTERSECTIONS...A COUPLE TORNADOES.

THE STORMS SHOULD DIMINISH FROM W TO E WITH TIME GIVEN EXPECTED

WARMING/SUBSIDENCE IN WAKE OF PROGRESSIVE UPR SYSTEM.



AVIATION...TORNADOES AND 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 30025.





...CORFIDI

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