PDS Tornado Watch for Oklahoma City, Tulsa & I-35 East in Oklahoma & North Texas


This is an urgent blog post. A PDS (Particularly Dangerous Situation) Tornado Watch is in effect for Oklahoma east of I-35 and the northern counties (one county deep) in Texas until I-35. Major development taking place right now & within an hour, storms will be severe with tornadic characteristics over most of the PDS Tornado Watch area. Here is the latest on this PDS Tornado Watch.

URGENT – IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 135
NWS STORM PREDICTION CENTER NORMAN OK
230 PM CDT THU APR 14 2011

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

MUCH OF THE EASTERN HALF OF OKLAHOMA
PARTS OF NORTH CENTRAL/NORTHEASTERN TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
1000 PM CDT.

…THIS IS A PARTICULARLY DANGEROUS SITUATION…

DESTRUCTIVE TORNADOES…LARGE HAIL TO 4 INCHES IN DIAMETER…
THUNDERSTORM WIND GUSTS TO 80 MPH…AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
BARTLESVILLE OKLAHOMA TO 40 MILES SOUTH SOUTHEAST OF SHERMAN
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 134…

DISCUSSION…DRY LINE LOCATED VICINITY I-35 CORRIDOR WITH THE AIR
MASS NOW VERY UNSTABLE EWD ACROSS OK. WITH LITTLE REMAINING
CINH…SEVERE THUNDERSTORMS WILL DEVELOP RAPIDLY OFF THE DRY LINE
AND MOVE THRU A VERY FAVORABLE ENVIRONMENT FOR SUPERCELLS. INITIALLY
VERY LARGE HAIL WILL BE THE RISK GIVEN THE STEEP LAPSE RATES AND
DEEP LAYER SHEAR. AS THE STRONG UPPER JET MAX APPROACHES TORNADIC
SUPERCELLS WILL BECOME MORE LIKELY BY LATER THIS AFTERNOON/EVENING
WITH POTENTIAL FOR LONG LIVED SUPERCELLS AND STRONG TORNADOES. DRY
LINE VERY LIKELY WILL MOVE LITTLE EWD FROM CURRENT POSITION WITH
POTENTIAL FOR SEVERE STORMS DEVELOPING ON W EDGE OF WATCH INTO THE
EVENING HOURS.

AVIATION…TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24035.

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