SPC Severe Thunderstorm Watch 317

WW 317 SEVERE TSTM CO KS NE 162025Z – 170300Z


URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 317
NWS STORM PREDICTION CENTER NORMAN OK
225 PM MDT SUN JUN 16 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  EASTERN COLORADO
  WESTERN KANSAS
  EXTREME SOUTHWEST NEBRASKA

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 225 PM UNTIL
  900 PM MDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A FEW LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH OF
GOODLAND KANSAS TO 40 MILES EAST SOUTHEAST OF SPRINGFIELD
COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 316...

DISCUSSION...CLUSTERS OF HIGH-BASED STORMS WILL EXPAND IN COVERAGE
AND INTENSIFY WHILE MOVING EWD/SEWD FROM CO/NEB INTO WRN KS THIS
AFTERNOON/EVENING.  GIVEN MODERATE INSTABILITY AND STEEP LOW-LEVEL
LAPSE RATES...DAMAGING OUTFLOW WINDS AND MARGINALLY SEVERE HAIL WILL
BE THE MAIN THREATS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29025.


...THOMPSON

via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0317.html