

695 

WWUS20 KWNS 082028

SEL9

SPC WW 082028

KSZ000-OKZ000-TXZ000-090400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 149

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT WED MAY 8 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL KANSAS

  WESTERN AND CENTRAL OKLAHOMA

  WEST CENTRAL AND NORTHWEST TEXAS AND EASTERN PARTS OF THE TEXAS

PANHANDLE



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 320 PM

  UNTIL 1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  NUMEROUS LARGE HAIL EVENTS EXPECTED WITH SEVERAL VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 100 MILES SOUTH

SOUTHEAST OF CHILDRESS TEXAS TO 20 MILES NORTH NORTHEAST OF

RUSSELL 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 148...



DISCUSSION...SCTD SUSTAINED TSTMS/SUPERCELLS EXPECTED TO FORM ALONG

AND AHEAD OF DRY LINE/LEE TROUGH EXTENDING SSW FROM SW KS SFC LOW

INTO WRN TX. STRENGTH AND DISCRETE NATURE OF STORMS WILL BE AIDED BY

RELATIVELY MODEST LOW-LVL CONVERGENCE...PERSISTENT UPR

DIFFLUENCE...AND STEEP LOW TO MID-LVL LAPSE RATES...SUGGESTING A

RISK FOR BOTH LARGE HAIL AND LOCALLY DMGG WINDS. WHILE

TEMPERATURE-DEWPOINT SPREADS ARE SIZABLE IN WW ATTM...POTENTIAL WILL

EXIST FOR CORRIDORS WITH AN ENHANCED RISK FOR LOW-LVL

ROTATION/TORNADOES GIVEN EXPECTED STORM INTERACTIONS LATER THIS

EVE..AND AS BOUNDARY LAYER BEGINS TO COOL/SSWLY LLJ STRENGTHENS.

THUS...PARTS OF THE WW MAY REQUIRE POSSIBLE UPGRADE TO TORNADO WW

LATER THIS EVE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25025.





...CORFIDI

