WATCHES: Severe Thunderstorm Watch Number 316

WWUS20 KWNS 140255
SEL6
SPC WW 140255
TXZ000-140900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 316
NWS STORM PREDICTION CENTER NORMAN OK
955 PM CDT TUE MAY 13 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

CENTRAL TEXAS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 955 PM
UNTIL 400 AM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST
NORTHWEST OF COLLEGE STATION TEXAS TO 40 MILES SOUTH OF AUSTIN
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 312...WW 314...WW 315...

DISCUSSION...MCS WILL CONTINUE ADVANCING EWD ACROSS CENTRAL TX
OVERNIGHT...AND MAY EVOLVE INTO A MORE LINEAR SYSTEM AND INCREASE
ITS FORWARD SPEED. AIR MASS IS VERY UNSTABLE WITH STEEP LAPSE RATES
AND STRONG DEEP LAYER SHEAR...ENHANCING THE POTENTIAL FOR LARGE HAIL
WITH THE STRONGER CORES. WIND DAMAGE THREAT WOULD ALSO INCREASE IF
SYSTEM CONSOLIDATES ALONG LEADING OUTFLOW BOUNDARY AND SURGES ENEWD
INTO CENTRAL TX.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26035.

...EVANS

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