SEL4

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 84
NWS STORM PREDICTION CENTER NORMAN OK
305 PM CST SUN MAR 2 2008

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

MUCH OF WESTERN OKLAHOMA
PARTS OF NORTHWEST TEXAS

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 305 PM UNTIL 900
PM CST.

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

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF
CLINTON OKLAHOMA TO 30 MILES SOUTH SOUTHWEST OF WICHITA FALLS
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER…A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION…CONTINUE…WW 83…

DISCUSSION…SHEAR PROFILES AND INSTABILITY HAVE BECOME FAVORABLE
FOR SUPERCELL DEVELOPMENT TO E OF DRY LINE IN WRN OK/NWRN TX.
STORMS WILL DEVELOP RAPIDLY AND SPREAD EWD DURING EVENING AHEAD OF
COLD FRONT THAT IS MOVING SEWD ACROSS NWRN OK ATTM. TORNADOES ALONG
WITH LARGE HAIL WILL BE POSSIBLE WITH ANY SUPERCELL.

AVIATION…TORNADOES AND 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 24035.

…HALES

SEL0

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 70
NWS STORM PREDICTION CENTER NORMAN OK
140 PM CST THU FEB 21 2008

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

CENTRAL AND SOUTHWEST LOUISIANA
WILKINSON COUNTY MISSISSIPPI
SOUTHEASTERN TEXAS
COASTAL WATERS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL
900 PM CST.

TORNADOES…HAIL TO 1.5 INCHES IN DIAMETER…THUNDERSTORM WIND
GUSTS TO 70 MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF HUNTSVILLE
TEXAS TO 20 MILES SOUTHEAST OF BATON ROUGE LOUISIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

REMEMBER…A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION…THUNDERSTORMS WILL CONTINUE TO INTENSIFY/INCREASE
ACROSS SERN TX INTO SWRN/S-CENTRAL LA THROUGH THE AFTERNOON AS
CAPPING WEAKENS WITHIN VERY MOIST BOUNDARY LAYER. DEEP ASCENT WILL
ALSO INCREASE THROUGH THE DAY AHEAD OF STRONG MID/UPPER LEVEL TROUGH
NOW MOVING ACROSS THE SRN PLAINS. IN RESPONSE…A SURFACE LOW WILL
DEEPEN AND LIFT NEWD INTO CENTRAL LA THROUGH THE MID EVENING.
EFFECTIVE SHEAR REMAINS MORE THAN ADEQUATE FOR SUPERCELLS…WITH
SUFFICIENT LOW LEVEL SHEAR AND LOW LCL HEIGHTS FOR ADDITIONAL
TORNADO THREAT. ISOLATED DAMAGING WINDS AND LARGE HAIL ARE
ADDITIONAL HAZARDS.

AVIATION…TORNADOES AND 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
450. MEAN STORM MOTION VECTOR 25030.

…EVANS