

868 

WWUS20 KWNS 300118

SEL9

SPC WW 300118

IAZ000-ILZ000-WIZ000-300800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 369

NWS STORM PREDICTION CENTER NORMAN OK

820 PM CDT SUN JUN 29 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EASTERN IOWA

  NORTHWEST ILLINOIS

  SOUTHWEST WISCONSIN



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 820 PM

  UNTIL 300 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTH OF

KNOXVILLE IOWA TO 30 MILES EAST SOUTHEAST OF LONEROCK WISCONSIN.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 367...WW 368...



DISCUSSION...INITIAL RIGHT- AND LEFT-MOVING SUPERCELLS WILL SPREAD

GENERALLY EWD INTO THE WATCH AREA FROM CENTRAL/NE IA THE NEXT FEW

HOURS.  THE STORM ENVIRONMENT WILL REMAIN FAVORABLE FOR ROTATING

STORMS...THOUGH LOW-LEVEL SHEAR IS NOT PARTICULARLY STRONG AND STORM

INTERACTIONS COULD EVENTUALLY LEAD TO MORE OF A CLUSTER STORM MODE.

LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS...THOUGH AN

ISOLATED TORNADO CANNOT BE RULED OUT LATE THIS EVENING ACROSS

EXTREME NE IA.



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 27030.





...THOMPSON

