

136 

WWUS20 KWNS 260300

SEL8

SPC WW 260300

IAZ000-ILZ000-INZ000-MOZ000-261000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 368

NWS STORM PREDICTION CENTER NORMAN OK

950 PM CDT TUE JUN 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EASTERN IOWA

  CENTRAL AND NORTHERN ILLINOIS

  WESTERN INDIANA

  FAR NORTHEAST MISSOURI



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 950 PM

  UNTIL 500 AM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST

OF CEDAR RAPIDS IOWA TO 35 MILES EAST NORTHEAST OF TERRE HAUTE

INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 362...WW 363...WW

364...WW 365...WW 366...WW 367...



DISCUSSION...SCTD STRONG TO SVR TSTMS EXPECTED TO CONTINUE FORMING

ATOP SHALLOW COOL DOME OVER CNTRL/NRN IL AND WRN IND...IN

WAA/MOISTURE TRANSPORT AREA ASSOCIATED WITH STRENGTHENING/VEERING

LLJ. STRONG...ELEVATED THETA-E ADVECTION AND INCREASING UPR

DIVERGENCE AHEAD OF UPR IMPULSE NOW AMPLIFYING OVER THE MID/LWR MO

VLY SUGGEST POTENTIAL FOR LARGE HAIL/LOCALLY DMGG WINDS FROM

SUSTAINED STORMS...STORM CLUSTERS...AND POSSIBLE SUPERCELLS.



FARTHER W...ADDITIONAL TSTMS MAY FORM LATER TNGT/EARLY WED IN CNTRL

IA...CLOSER TO UPR TROUGH AXIS. THIS ACTIVITY SHOULD MOVE/DEVELOP

ESE OR SEWD...POSING A RISK FOR SVR HAIL AND WIND OVER ERN IA AS THE

STORMS EVOLVE INTO A LARGER-SCALE CLUSTER.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27030.





...CORFIDI

