

067 

WWUS20 KWNS 301446

SEL3

SPC WW 301446

IAZ000-NEZ000-302300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 373

NWS STORM PREDICTION CENTER NORMAN OK

935 AM CDT MON JUN 30 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL IOWA

  EASTERN NEBRASKA



* EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 935 AM UNTIL 600

  PM CDT.



* PRIMARY THREATS INCLUDE...

  A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE

  WIDESPREAD LARGE HAIL EXPECTED WITH ISOLATED VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  WIDESPREAD DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST NORTHWEST OF

COLUMBUS NEBRASKA TO 15 MILES NORTH NORTHEAST OF OTTUMWA IOWA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 372...



DISCUSSION...TSTMS EXPECTED TO CONTINUE TO FORM ALONG AND N OF

DIFFUSE BOUNDARY EXTENDING ROUGHLY WNW-ESE FROM E CNTRL NEB INTO

CNTRL IA...AND S OF STRONGER/LWR THETA-E BOUNDARY LOCATED FARTHER N.

ACTIVITY WILL BE SUPPORTED BY SUSTAINED...MOIST SSW LOW-LVL FLOW

AHEAD OF WEAK UPR IMPULSE NOW IN CNTRL NEB/NW KS...AND BY STRONG SFC

HEATING S OF SRN-MOST BOUNDARY. GIVEN DEGREE OF BUOYANCY...40-50 KT

700-500 MB FLOW...SETUP COULD YIELD A FEW SUPERCELLS WITH VERY LARGE

HAIL...DMGG WIND...AND TORNADOES. SOME POTENTIAL ALSO WILL EXIST FOR

THE DEVELOPMENT OF A BOW ECHO IN WRN PART OF WW. IF SUCH AN MCS WERE

TO FORM...IT WOULD HAVE THE POTENTIAL FOR SOMEWHAT MORE WIDESPREAD

DMGG WIND/HAIL THIS AFTN ESEWD INTO IA.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

600. MEAN STORM MOTION VECTOR 29035.





...CORFIDI

