SPC Severe Thunderstorm Watch 273

WW 273 SEVERE TSTM KS OK TX 032030Z – 040400Z

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 273
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT MON JUN 3 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  SOUTHWEST KANSAS
  WESTERN OKLAHOMA INCLUDING THE CENTRAL AND EASTERN PANHANDLE
  CENTRAL AND EASTERN TEXAS PANHANDLE

* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
  1100 PM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF
DODGE CITY KANSAS TO 25 MILES WEST OF ALTUS OKLAHOMA.  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.

&&

DISCUSSION...HIGH-BASED STORMS HAVE DEVELOPED FROM SERN CO INTO SWRN
KS AHEAD OF A WEAK VORTICITY MAX WITHIN A DEEPLY MIXED AIR MASS
CHARACTERIZED BY STEEP LAPSE RATES.  THERMODYNAMIC PROFILES ARE
FAVORABLE FOR STRONG DOWNDRAFTS AND HAIL WITH INITIAL STORMS.  NWP
MODEL GUIDANCE INCLUDING CONVECTION-ALLOWING ENSEMBLES SHOW STRONG
AGREEMENT THROUGH THE EVENING HOURS THAT STORMS WILL GRADUALLY
GENERATE A MESOSCALE COLD POOL AND GROW UPSCALE INTO SEWD MOVING
MCS...WITH POTENTIAL FOR MORE ORGANIZED DAMAGING WIND GUSTS ALONG
THE LEADING EDGE OF THE COMPOSITE OUTFLOW BOUNDARY.

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.


...WEISS

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