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WWUS20 KWNS 141742

SEL4

SPC WW 141742

IAZ000-MNZ000-NEZ000-SDZ000-150200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 254

NWS STORM PREDICTION CENTER NORMAN OK

1240 PM CDT TUE JUN 14 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  IOWA

  SOUTHWEST MINNESOTA

  FAR EASTERN NEBRASKA

  SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL

  900 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...STRONG TO SEVERE THUNDERSTORMS SHOULD CONTINUE TO INCREASE

WITHIN A MOIST/INCREASINGLY UNSTABLE AIR MASS FROM EASTERN NEBRASKA

INTO IOWA AND ADJACENT PARTS OF SOUTH DAKOTA AND MINNESOTA. A WARM

FRONT WILL CONTINUE TO LIFT NORTHWARD FROM NORTHERN IOWA INTO

SOUTHERN MINNESOTA. PORTIONS OF MINNESOTA AND EXTREME EASTERN SOUTH

DAKOTA WILL BE MONITORED FOR AN INCREASING TORNADO RISK NEAR THE

WARM FRONT AND A POSSIBLE TORNADO WATCH UPGRADE LATER THIS

AFTERNOON.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF

DES MOINES IOWA TO 50 MILES NORTH OF WORTHINGTON MINNESOTA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



&&



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 24025.





...GUYER

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