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520 

WWUS20 KWNS 190630

SEL3

SPC WW 190630

IAZ000-MNZ000-NEZ000-SDZ000-191100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 333

NWS STORM PREDICTION CENTER NORMAN OK

135 AM CDT THU JUN 19 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME NORTHWEST IOWA

  SOUTHWEST MINNESOTA

  EXTREME NORTHEAST NEBRASKA

  SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS THURSDAY MORNING FROM 135 AM UNTIL 600 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHWEST OF WORTHINGTON MINNESOTA TO 80 MILES SOUTH OF SIOUX

FALLS SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 328...WW 330...WW

331...WW 332...



DISCUSSION...CLUSTER OF STORMS IN NE NEB WILL LIKELY PERSIST WHILE

DEVELOPING NNEWD ALONG NW EDGE OF STRONGER INSTABILITY AND A SURFACE

FRONT.  STRONG RESIDUAL BUOYANCY AND SSWLY DEEP-LAYER FLOW WILL

SUPPORT A RISK FOR DAMAGING GUSTS AND HAIL WITH THE CLUSTER FOR THE

NEXT FEW HOURS.



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 550. MEAN STORM

MOTION VECTOR 21030.





...THOMPSON

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