

400 

WWUS20 KWNS 062300

SEL4

SPC WW 062300

IAZ000-MNZ000-MOZ000-NEZ000-070600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 504

NWS STORM PREDICTION CENTER NORMAN OK

600 PM CDT SUN SEP 6 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWEST THROUGH NORTHEAST IOWA

  FAR SOUTHEAST MINNESOTA

  FAR NORTHWEST MISSOURI

  SOUTHEAST NEBRASKA



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 600 PM

  UNTIL 100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 2 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



SUMMARY...SCATTERED THUNDERSTORMS...POSSIBLY INCLUDING A COUPLE

SUPERCELLS...EXPECTED TO FORM ALONG AND AHEAD OF EAST-MOVING COLD

FRONT NOW IN SE NEB/NW IA. THE STORMS WILL BE CAPABLE OF

HAIL...LOCALLY DAMAGING WIND...AND PERHAPS A BRIEF TORNADO...AND

WILL GROW INTO ONE OR TWO LARGER-SCALE CLUSTERS LATER TONIGHT.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHEAST OF

MASON CITY IOWA TO 30 MILES SOUTHEAST OF BEATRICE NEBRASKA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 503...



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 25025.





...CORFIDI

