

414 

WWUS20 KWNS 150216

SEL4

SPC WW 150216

IAZ000-MOZ000-150700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 314

NWS STORM PREDICTION CENTER NORMAN OK

920 PM CDT FRI JUN 14 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WEST CENTRAL IOWA

  EXTREME NORTHERN MISSOURI



* EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 920 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHWEST OF

DES MOINES IOWA TO 20 MILES SOUTH SOUTHWEST OF LAMONI IOWA.  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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 313...



DISCUSSION...ORGANIZED BOW ECHO IS MOVING ACROSS THE OMA

AREA...WHILE MORE ISOLATED CELLS DEVELOP FARTHER EAST OVER IA.  IT

IS UNCERTAIN HOW FAR EAST STORMS WILL REMAIN INTENSE DUE TO

LESSENING INSTABILITY...BUT STRONG LOW LEVEL JET AND MESOSCALE

ORGANIZATION MAY BE ENOUGH TO MAINTAIN A RISK OF HAIL AND DAMAGING

WINDS FOR ANOTHER FEW HOURS.  STORMS MAY DEVELOP SOUTHEASTWARD INTO

NORTHERN MO BEFORE MIDNIGHT AS WELL.



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 500. MEAN STORM

MOTION VECTOR 27030.





...HART

