Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 247
NWS STORM PREDICTION CENTER NORMAN OK
545 PM CDT TUE MAY 5 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTH CENTRAL TEXAS
EFFECTIVE THIS TUESDAY AFTERNOON FROM 545 PM UNTIL MIDNIGHT CDT.
TORNADOES...HAIL TO 3 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 55 MILES WEST OF ABILENE
TEXAS TO 35 MILES EAST SOUTHEAST OF MINERAL WELLS TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).
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 245...WW 246...
DISCUSSION...ISOLATED SUPERCELL THUNDERSTORMS ARE EXPECTED TO
RAPIDLY DEVELOP LATE THIS AFTERNOON NEAR THE TRIPLE POINT OF A COLD
FRONT AND DRYLINE. EXTREME INSTABILITY AND FAVORABLE EFFECTIVE
SHEAR WILL PROMOTE ROTATING STORMS CAPABLE OF VERY LARGE HAIL AND
DAMAGING WINDS. TORNADOES WILL ALSO BE POSSIBLE IF STORMS AS LONG
AS STORMS CAN REMAIN DISCRETE THROUGH THE EVENING.
AVIATION...TORNADOES AND 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
600. MEAN STORM MOTION VECTOR 29025.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 247 TORNADO TX 052245Z - 060500Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
55W ABI/ABILENE TX/ - 35ESE MWL/MINERAL WELLS TX/
..AVIATION COORDS.. 55NM N/S /39W ABI - 30SW DFW/
HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 29025.
LAT...LON 33360062 33529751 31639751 31470062
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 247 Status Report Message has not been issued yet.
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (40%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
High (90%)
|
Probability
of 1 or
more hailstones > 2 inches
|
High (70%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (90%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
