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458 

WWUS20 KWNS 122052

SEL2

SPC WW 122052

IAZ000-ILZ000-WIZ000-LMZ000-130400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 152

NWS STORM PREDICTION CENTER NORMAN OK

350 PM CDT MON MAY 12 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  FAR NORTHEAST IOWA

  NORTHERN ILLINOIS

  SOUTHERN WISCONSIN

  LAKE MICHIGAN



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

  1100 PM 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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTHWEST

OF LONEROCK WISCONSIN TO 5 MILES NORTH NORTHEAST OF RACINE

WISCONSIN.  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 149...WW 150...WW 151...



DISCUSSION...TSTMS HAVE RECENTLY RE-DEVELOPED ALONG AN OUTFLOW

BOUNDARY-WARM FRONT OVER FAR SRN WI WITH ADDITIONAL STORMS EXPECTED

TO MOVE INTO THE WATCH AREA FROM THE SOUTHWEST LATER THIS AFTERNOON

INTO EVENING. GIVEN THE PRESENCE OF A MOIST/MODERATELY UNSTABLE AIR

MASS WITH A VERTICALLY VEERING WIND PROFILE WITH 40-50 KT OF

DEEP-LAYER SHEAR...THE SETUP WILL SUPPORT ORGANIZED STORM

MODES...INCLUDING SUPERCELLS AND BOWING STRUCTURES WITH A RISK FOR

LARGE HAIL AND DAMAGING WINDS. THE RISK FOR A TORNADO OR TWO WILL

EXIST WITH ANY STORMS THAT CAN FAVORABLY INTERACT WITH THE WARM

FRONT ACROSS FAR SRN WI.



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 23025.





...MEAD

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