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WWUS20 KWNS 180136

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SPC WW 180136

MNZ000-SDZ000-180700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 432

NWS STORM PREDICTION CENTER NORMAN OK

835 PM CDT FRI JUL 17 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WEST-CENTRAL AND SOUTHWEST MINNESOTA

  EAST-CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 835 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...A CLUSTER OF SUPERCELLS ONGOING OVER NORTHEAST SD IS

EXPECTED TO TRANSITION TO A LINE OF STORMS WHICH WILL TRACK

EAST-SOUTHEAST ACROSS THE WATCH AREA.  LARGE HAIL AND PERHAPS A

BRIEF TORNADO OR TWO IS POSSIBLE PRIOR TO AND DURING THIS TRANSITION

WITH DAMAGING OUTFLOW WINDS BEING THE PRIMARY HAZARD THEREAFTER.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES EITHER SIDE OF A LINE FROM 10 MILES SOUTH SOUTHWEST

OF ORTONVILLE MINNESOTA TO 45 MILES EAST SOUTHEAST OF REDWOOD

FALLS MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 430...WW 431...



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 550. MEAN STORM

MOTION VECTOR 29030.





...MEAD

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