SPC Severe Thunderstorm Watch 289

WW 289 SEVERE TSTM IA KS MO NE 082100Z – 090400Z

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 289
NWS STORM PREDICTION CENTER NORMAN OK
400 PM CDT SAT JUN 8 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  WESTERN IOWA
  NORTH CENTRAL AND NORTHEAST KANSAS
  FAR NORTHWEST MISSOURI
  SOUTH CENTRAL THROUGH EAST CENTRAL AND SOUTHEAST NEBRASKA

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
  1100 PM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF
OMAHA NEBRASKA TO 30 MILES SOUTH SOUTHEAST OF CONCORDIA KANSAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 288...

DISCUSSION...TSTMS EXPECTED TO FORM IN ZONE OF DCVA/WAA AHEAD OF
AMPLIFYING...DIFFLUENT UPR TROUGH NOW OVER CNTRL NEB. WHILE BOUNDARY
LAYER BUOYANCY WILL REMAIN LIMITED...COMBINATION OF WIND PROFILES
AND DEEP FORCING FOR ASCENT WILL BE FAVORABLE FOR SUSTAINED
STORMS/SUPERCELLS. THESE MAY YIELD LOCALLY DMGG WIND...MARGINALLY
SVR HAIL. A COUPLE TORNADOES ALSO MAY OCCUR GIVEN SIZABLE LOW-LVL
DIRECTIONAL SHEAR /ESPECIALLY NEAR WEAK WNW-ESE FRONT IN ERN NEB/.

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 26030.


...CORFIDI

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