WATCHES: Severe Thunderstorm Watch Number 149

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

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