

190 

WWUS20 KWNS 111654

SEL1

SPC WW 111654

IAZ000-ILZ000-120000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 141

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM CDT SUN MAY 11 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN IOWA

  NORTHWEST ILLINOIS



* EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1155 AM UNTIL

  700 PM CDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF KNOXVILLE

IOWA TO 30 MILES NORTHEAST OF MOLINE ILLINOIS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



&&



DISCUSSION...REMNANTS OF A NOCTURNAL MCS HAVE RECENTLY INTENSIFIED

OVER S-CNTRL IA ALONG A WARM FRONT LIFTING NWD THROUGH THE REGION.

CONTINUED MOISTENING/DESTABILIZATION AND STRENGTHENING LOW-LEVEL AND

DEEP-LAYER SHEAR WILL SUPPORT AN INCREASING THREAT FOR EMBEDDED

SUPERCELLS AS STORMS SPREAD NORTHEAST ACROSS THE WATCH AREA. A

COUPLE OF TORNADOES...LARGE HAIL AND DAMAGING WINDS WILL BE

POSSIBLE.



AVIATION...TORNADOES AND 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 25030.





...MEAD

