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WWUS20 KWNS 202028

SEL1

SPC WW 202028

MNZ000-NDZ000-SDZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 331

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT THU JUN 20 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME WEST CENTRAL MINNESOTA

  SOUTH CENTRAL AND SOUTHEAST NORTH DAKOTA

  NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 325 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 2 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 115

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH

NORTHWEST OF JAMESTOWN NORTH DAKOTA TO 65 MILES SOUTH OF ABERDEEN

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



&&



DISCUSSION...VISIBLE SATELLITE AND RADAR IMAGERY SHOW THE INITIAL

STAGES OF THUNDERSTORM DEVELOPMENT E-SE OF BISMARCK NEAR THE SURFACE

LOW...AND STORMS WILL LIKELY INCREASE IN COVERAGE/INTENSITY THROUGH

THE AFTERNOON.  THE INITIAL STORMS COULD BE SUPERCELLS WITH A RISK

FOR LARGE HAIL...AND POSSIBLY A BRIEF TORNADO AS STORMS INTERACT

WITH THE WARM FRONT IN S CENTRAL ND.  LATER THIS

AFTERNOON/EVENING...STORMS SHOULD GROW INTO A LARGER CLUSTER AND

SPREAD EWD/SEWD ACROSS SE ND/NE SD...WITH AN ACCOMPANYING RISK FOR

DAMAGING WINDS.



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 28025.





...THOMPSON

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