ABC 33/40 EWARN: Severe Weather Watch Notice

From ABC 33/40 E-Warn :

WWUS20 KWNS 201518
SEL6
SPC WW 201518
ALZ000-GAZ000-202300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 546
NWS STORM PREDICTION CENTER NORMAN OK
1020 AM CDT FRI JUL 20 2007

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

NORTHERN AND CENTRAL ALABAMA
WESTERN GEORGIA

EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1020 AM UNTIL 600
PM CDT.

HAIL TO 2 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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF
BIRMINGHAM ALABAMA TO 35 MILES SOUTH OF AUBURN ALABAMA. 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.

DISCUSSION...LINE OF STRONG/SEVERE STORMS CONTINUE MOVING SSEWD AT
AROUND 30 KT. ACTIVITY IS MOVING INTO AN INSTABILITY AXIS WHERE
MORNING HEATING HAS BROUGHT ML PARCEL CAPE TO BETWEEN 1500-2000
J/KG. ANALYSIS OF 13Z RUC SOUNDINGS SUPPORT STEEP LAPSE RATES TO
3KM ARE AROUND 8C/KM WHICH INDICATES POTENTIAL FOR DAMAGING WINDS
AND HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 30030.

...MCCARTHY
WWWW

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