Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 176
NWS STORM PREDICTION CENTER NORMAN OK
845 PM CDT SUN APR 19 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF CENTRAL AND EASTERN ALABAMA
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 845 PM UNTIL
100 AM CDT.
TORNADOES...HAIL TO 2 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 70 STATUTE
MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHWEST OF LA
GRANGE GEORGIA TO 15 MILES SOUTH SOUTHWEST OF SELMA ALABAMA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 173. WATCH NUMBER 173 WILL NOT BE IN EFFECT AFTER
845 PM CDT. CONTINUE...WW 174...WW 175...
DISCUSSION...SEVERE THUNDERSTORMS INCLUDING SUPERCELLS CONTINUE TO
DEVELOP AND MOVE EWD AHEAD OF UPPER TROUGH AND COLD FRONT
APPROACHING AL. THE THREAT OF TORNADOES WILL CONTINUE UNTIL LATER
THIS EVENING WHEN THE AIR MASS EXPECTED TO EVENTUALLY BECOME MORE
STABLE AND STRONG DEEP LAYER SHEAR SLOWLY WEAKENS.
AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 24030.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW6
WW 176 TORNADO AL 200145Z - 200600Z
AXIS..70 STATUTE MILES EITHER SIDE OF LINE..
30NNW LGC/LA GRANGE GA/ - 15SSW SEM/SELMA AL/
..AVIATION COORDS.. 60NM EITHER SIDE /21N LGC - 39W MGM/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24030.
REPLACES WW 173..AL MS
LAT...LON 32568459 31308641 32998775 34248594
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 176 Status Report Messages:
STATUS REPORT #3 ON WW 176
VALID 200540Z - 200640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNE GZH
TO 15 NNW LGC.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 535.
..GOSS..04/20/09
ATTN...WFO...BMX...
&&
STATUS REPORT FOR WT 176
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC005-011-017-051-081-085-087-101-109-113-123-200640-
AL
. ALABAMA COUNTIES INCLUDED ARE
BARBOUR BULLOCK CHAMBERS
ELMORE LEE LOWNDES
MACON MONTGOMERY PIKE
RUSSELL TALLAPOOSA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 176
VALID 200435Z - 200540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SW SEM TO
25 ESE ANB.
..DIAL..04/20/09
ATTN...WFO...BMX...
&&
STATUS REPORT FOR WT 176
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC005-011-017-051-081-085-087-101-109-111-113-123-200540-
AL
. ALABAMA COUNTIES INCLUDED ARE
BARBOUR BULLOCK CHAMBERS
ELMORE LEE LOWNDES
MACON MONTGOMERY PIKE
RANDOLPH RUSSELL TALLAPOOSA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 176
VALID 200335Z - 200440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 W SEM TO
20 ENE GAD.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 533
..DIAL..04/20/09
ATTN...WFO...BMX...
&&
STATUS REPORT FOR WT 176
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC001-005-011-015-017-019-021-027-029-037-047-051-081-085-087-
101-109-111-113-121-123-200440-
AL
. ALABAMA COUNTIES INCLUDED ARE
AUTAUGA BARBOUR BULLOCK
CALHOUN CHAMBERS CHEROKEE
CHILTON CLAY CLEBURNE
COOSA DALLAS ELMORE
LEE LOWNDES MACON
MONTGOMERY PIKE RANDOLPH
RUSSELL TALLADEGA TALLAPOOSA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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 
@NWSSPC
