WWUS20 KWNS 091840
SEL3
SPC WW 091840
IAZ000-MNZ000-NEZ000-SDZ000-100300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 483
NWS STORM PREDICTION CENTER NORMAN OK
140 PM CDT SUN AUG 9 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  NORTHWEST IOWA
  SOUTHWEST MINNESOTA
  NORTHEAST NEBRASKA
  SOUTH DAKOTA

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 140 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
    INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A TORNADO OR TWO POSSIBLE

SUMMARY...SEVERE THUNDERSTORMS ARE EXPECTED TO INCREASE THROUGH
MID/LATE AFTERNOON...INITIALLY ACROSS NORTHERN AND EAST-CENTRAL
SOUTH DAKOTA AND NORTHEAST NEBRASKA. LARGE HAIL AND DAMAGING WINDS
WILL BE POSSIBLE AND A BRIEF TORNADO COULD ALSO OCCUR. STORMS MAY
ULTIMATELY MERGE AND DEVELOP INTO A SOUTHEASTWARD-MOVING LINE OF
SEVERE CONVECTION BY EARLY EVENING.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTH
SOUTHWEST OF PIERRE SOUTH DAKOTA TO 55 MILES EAST SOUTHEAST OF
SIOUX FALLS SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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.

&&

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29030.


...GUYER