Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 99
NWS STORM PREDICTION CENTER NORMAN OK
445 PM EDT THU APR 11 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EASTERN ALABAMA
WEST CENTRAL AND NORTHWEST GEORGIA
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 445 PM UNTIL
1100 PM EDT.
TORNADOES...HAIL TO 1 INCH 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 EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHEAST OF
ROME GEORGIA TO 20 MILES SOUTHEAST OF MONTGOMERY ALABAMA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).
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 96...WW 97...WW 98...
DISCUSSION...PRE-FRONTAL CONVECTION CONTINUES TO DEVELOP ACROSS E
CENTRAL AL IN AN ENVIRONMENT OF MODERATE INSTABILITY AND SLOWLY
INCREASING VERTICAL SHEAR. SOME OF THESE STORMS COULD CONTINUE TO
DEVELOP SUPERCELL STRUCTURES FOR THE NEXT FEW HOURS...AND THE
STRONGEST STORMS MAY POSE A RISK FOR A TORNADO OR TWO.
OTHERWISE...THE FRONTAL SQUALL LINE IN AL WILL PROGRESS EWD INTO GA
LATE THIS EVENING THROUGH EARLY TONIGHT...WITH A CONTINUING RISK FOR
DAMAGING GUSTS AND PERHAPS A COUPLE OF EMBEDDED CIRCULATIONS WITH
QLCS TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24035.
...THOMPSON
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 99 TORNADO AL GA 112045Z - 120300Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
45NNE RMG/ROME GA/ - 20SE MGM/MONTGOMERY AL/
..AVIATION COORDS.. 60NM E/W /14E GQO - 12SE MGM/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24035.
LAT...LON 34958362 32088495 32088734 34958609
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 99 Status Report Messages:
STATUS REPORT #3 ON WW 99
VALID 120240Z - 120340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 ENE TOI
TO 20 WSW LGC TO 20 WNW ATL TO 35 ESE RMG TO 55 NNW AHN.
FOR ADDITIONAL INFORMATION SEE SPC MESOSCALE DISCUSSION 454.
..EDWARDS..04/12/13
ATTN...WFO...BMX...FFC...
&&
STATUS REPORT FOR WT 99
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC005-017-081-113-120340-
AL
. ALABAMA COUNTIES INCLUDED ARE
BARBOUR CHAMBERS LEE
RUSSELL
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 99
VALID 120140Z - 120240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 N TOI TO
20 ENE MGM TO 35 S RMG TO 35 ENE RMG TO 45 E CHA.
GA COUNTIES HAVE BEEN TRANSFERRED TO WW 101.
..EDWARDS..04/12/13
ATTN...WFO...BMX...FFC...
&&
STATUS REPORT FOR WT 99
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC005-011-017-081-087-109-113-123-120240-
AL
. ALABAMA COUNTIES INCLUDED ARE
BARBOUR BULLOCK CHAMBERS
LEE MACON 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 #1 ON WW 99
VALID 120035Z - 120140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SW MGM TO
20 E CHA.
..GUYER..04/12/13
ATTN...WFO...BMX...FFC...
&&
STATUS REPORT FOR WT 99
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC005-011-017-019-027-029-051-081-087-101-109-111-113-123-
120140-
AL
. ALABAMA COUNTIES INCLUDED ARE
BARBOUR BULLOCK CHAMBERS
CHEROKEE CLAY CLEBURNE
ELMORE LEE MACON
MONTGOMERY PIKE RANDOLPH
RUSSELL TALLAPOOSA
$$
GAC047-055-120140-
GA
. GEORGIA COUNTIES INCLUDED ARE
CATOOSA CHATTOOGA
$$
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 (50%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Low (10%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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
