Alert archive / Georgia / Tornado Watches in 2011
Tornado Watch 65
The Storm Prediction Center issued this tornado watch at Mar 26, 2011, 7:47 PM CDT for 23 counties in Alabama; 67 counties in Georgia. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 26, 2011, 7:47 PM CDT (00:47 UTC)
- Expired
- Mar 27, 2011, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 90 counties
Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Etowah County, AL, Fayette County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Marion County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Baldwin County, GA, Ben Hill County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Carroll County, GA, Chattahoochee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Douglas County, GA, Emanuel County, GA, Fayette County, GA, Fulton County, GA, Glascock County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Newton County, GA, Paulding County, GA, Peach County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Putnam County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA
The radar
The Birmingham radar (KBMX), 58 km from the middle of the area, began a volume at 00:48 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 8:05 PM CDT | Tornado Warning | BMX | Jefferson, Walker | 55 min |
| Mar 26, 8:20 PM CDT | Severe Thunderstorm Warning | FFC | Johnson, Laurens, Wilkinson | 40 min |
| Mar 26, 8:21 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 24 min |
| Mar 26, 8:28 PM CDT | Severe Thunderstorm Warning | BMX | Marion, Winston | 62 min |
| Mar 26, 8:30 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee, Etowah | 60 min |
| Mar 26, 8:44 PM CDT | Tornado Warning | FFC | Emanuel, Johnson, Laurens | 46 min |
| Mar 26, 8:58 PM CDT | Severe Thunderstorm Warning | BMX | Blount, Calhoun, Jefferson, St. Clair, Talladega | 25 min |
| Mar 26, 9:08 PM CDT | Severe Thunderstorm Warning | FFC | Bartow, Cherokee, Cobb, Paulding, Polk | 52 min |
| Mar 26, 9:09 PM CDT | Severe Thunderstorm Warning | FFC | Clayton, Fayette, Fulton, Henry | 25 min |
| Mar 26, 9:13 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Cherokee, Cleburne, Etowah | 47 min |
| Mar 26, 9:16 PM CDT | Severe Thunderstorm Warning | BMX | Marion, Winston | 59 min |
| Mar 26, 9:30 PM CDT | Severe Thunderstorm Warning | FFC | Cobb, DeKalb, Fulton, Gwinnett | 60 min |
| Mar 26, 9:41 PM CDT | Severe Thunderstorm Warning | FFC | Haralson, Polk | 49 min |
| Mar 26, 9:44 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Marion, Walker, Winston | 46 min |
| Mar 26, 10:12 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Clay, Cleburne, Randolph, Talladega | 48 min |
| Mar 26, 10:13 PM CDT | Severe Thunderstorm Warning | FFC | Barrow, DeKalb, Henry, Newton, Oconee, Rockdale and 1 more | 47 min |
| Mar 26, 10:27 PM CDT | Severe Thunderstorm Warning | BMX | Blount, Jefferson, Walker | 63 min |
| Mar 26, 10:27 PM CDT | Tornado Warning | BMX | Clay, St. Clair, Talladega | 15 min |
| Mar 26, 10:30 PM CDT | Severe Thunderstorm Warning | BMX | Clay, Jefferson, St. Clair, Shelby, Talladega | 45 min |
| Mar 26, 10:34 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Lamar, Tuscaloosa | 56 min |
| Mar 26, 10:45 PM CDT | Severe Thunderstorm Warning | BMX | Clay, Cleburne, Randolph, St. Clair, Talladega | 45 min |
| Mar 26, 10:56 PM CDT | Severe Thunderstorm Warning | FFC | Carroll, Coweta, Douglas, Fulton | 34 min |
| Mar 26, 11:09 PM CDT | Severe Thunderstorm Warning | BMX | Clay, Talladega | 36 min |
| Mar 26, 11:19 PM CDT | Severe Thunderstorm Warning | BMX | Clay, Randolph | 41 min |
| Mar 26, 11:28 PM CDT | Severe Thunderstorm Warning | BMX | Jefferson, Tuscaloosa, Walker | 16 min |
| Mar 27, 12:32 AM CDT | Severe Thunderstorm Warning | BMX | Randolph | 15 min |
| Mar 27, 12:38 AM CDT | Severe Thunderstorm Warning | FFC | Heard, Troup | 52 min |
| Mar 27, 1:06 AM CDT | Tornado Warning | BMX | Chambers | 17 min |
| Mar 27, 1:08 AM CDT | Tornado Warning | BMX | Chambers, Clay, Randolph, Tallapoosa | 52 min |
| Mar 27, 1:12 AM CDT | Tornado Warning | BMX | Chambers, Tallapoosa | 48 min |
| Mar 27, 1:52 AM CDT | Tornado Warning | BMX | Chambers | 22 min |
| Mar 27, 1:53 AM CDT | Tornado Warning | BMX | Chambers, Tallapoosa | 13 min |
| Mar 27, 2:00 AM CDT | Tornado Warning | FFC | Meriwether, Talbot, Troup, Upson | 45 min |
| Mar 27, 2:55 AM CDT | Severe Thunderstorm Warning | FFC | Bibb, Crawford, Lamar, Monroe, Peach, Upson | 50 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 0.8 hours before the alert went out and 59 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1774 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1230 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 373 m²/s²
- Significant tornado parameter
- 2.7
- Supercell composite
- 16.5
The text
As transmitted, in the capitals the NWS used until 2016.
593
WWUS20 KWNS 270050
SEL5
SPC WW 270050
ALZ000-GAZ000-270800-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 65
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CDT SAT MAR 26 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHERN AND CENTRAL ALABAMA
WESTERN AND CENTRAL GEORGIA
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 745 PM
UNTIL 300 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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST OF
TUSCALOOSA ALABAMA TO 50 MILES SOUTHEAST OF MACON GEORGIA. 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 62...WW 63...WW 64...
DISCUSSION...CORRIDOR BETWEEN SYNOPTIC WARM FRONT AND AIR MASS WHICH
HAD BECOME HOT AND DEEPER MIXED /GENERALLY FROM NRN AL INTO CNTRL
GA/ HAS MAINTAINED A MOIST...MODERATELY UNSTABLE AIR MASS IN
CONJUNCTION WITH RELATIVELY STRONG LOW AND DEEP-LAYER SHEAR. AS
SUCH...EXPECT ONGOING SUPERCELLS TO PROGRESS EWD/ESEWD THROUGH WW
AREA WITH A CONTINUED THREAT FOR TORNADOES...LARGE HAIL AND DAMAGING
WIND GUSTS.
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 28035.
...MEADSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 11:21 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more | 54 min |
| Mar 27, 7:33 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chambers, Chilton, Clay, Coosa and 16 more | 117 min |
| Mar 27, 8:55 AM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bullock, Butler, Chambers, Chilton and 17 more | 7 hr |
| Mar 27, 10:51 AM CDT | Mesoscale Discussion | SPC | Barbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more | 84 min |
| Mar 27, 2:49 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Geneva, Henry and 1 more | 56 min |
| Mar 27, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | Coffee, Covington, Dale, Escambia, Geneva, Henry and 1 more | 5 hr |
| Mar 27, 6:24 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more | 2 hr |
| Mar 26, 7:55 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Catoosa, Chattooga, Cherokee and 36 more | 95 min |
| Mar 26, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 39 more | 8 hr |
| Mar 26, 10:10 PM CDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 3 more | 65 min |
| Mar 26, 11:43 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 38 more | 62 min |
| Mar 27, 2:03 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Bibb, Bleckley and 40 more | 57 min |
| Mar 27, 2:25 AM CDT | Tornado Watch | SPC | Appling, Baldwin, Bibb, Bleckley, Bryan, Bulloch and 46 more | 3 hr |
Nearby
Tornado Watches in Georgia, 2011Tornado Watches in Alabama, 2011Every tornado watch in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.