Alert archive / Georgia / Tornado Watches in 2010
Tornado Watch 734
The Storm Prediction Center issued this tornado watch at Oct 27, 2010, 11:49 AM CDT for 22 counties in Alabama; 42 counties in Georgia; Kemper County, Lauderdale County, Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 27, 2010, 11:49 AM CDT (16:49 UTC)
- Expired
- Oct 27, 2010, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 66 counties
Autauga County, AL, Bibb County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Montgomery County, AL, Perry County, AL, Randolph County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Banks County, GA, Barrow County, GA, Butts County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Forsyth County, GA, Fulton County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lamar County, GA, Madison County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pike County, GA, Putnam County, GA, Rockdale County, GA, Spalding County, GA, Taliaferro County, GA, Troup County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Wilkes County, GA, Kemper County, MS, Lauderdale County, MS
The radar
The Birmingham radar (KBMX), 46 km from the middle of the area, began a volume at 16:49 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
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 27, 1:13 PM CDT | Tornado Warning | FFC | Clayton, DeKalb, Henry, Rockdale | 13 min |
| Oct 27, 3:24 PM CDT | Severe Thunderstorm Warning | FFC | Oglethorpe | 36 min |
| Oct 27, 4:32 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale | 43 min |
| Oct 27, 4:45 PM CDT | Tornado Warning | JAN | Lauderdale | 23 min |
| Oct 27, 4:49 PM CDT | Severe Thunderstorm Warning | BMX | Sumter | 41 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 12:00Z, 4.8 hours before the alert went out and 47 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
- 1358 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 481 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 5.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 8:03 PM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 9 more | 8 hr |
| Oct 26, 10:51 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 8 more | 54 min |
| Oct 27, 5:29 AM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 16 more | 61 min |
| Oct 27, 5:48 AM CDT | Tornado Watch | SPC | Autauga, Bibb, Calhoun, Chambers, Cherokee, Chilton and 19 more | 6 hr |
| Oct 27, 7:54 AM CDT | Mesoscale Discussion | SPC | Bibb, Calhoun, Cherokee, Chilton, Choctaw, Clay and 15 more | 96 min |
| Oct 27, 9:40 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chambers, Chilton, Choctaw, Clay and 11 more | 95 min |
| Oct 27, 2:41 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Calhoun, Chambers, Chilton, Choctaw and 23 more | 64 min |
| Oct 27, 6:40 PM CDT | Mesoscale Discussion | SPC | Autauga, Bullock, Chambers, Chilton, Choctaw, Clarke and 15 more | 65 min |
| Oct 26, 10:05 PM CDT | Mesoscale Discussion | SPC | Franklin, Habersham, Rabun, Stephens | 55 min |
| Oct 26, 11:24 PM CDT | Mesoscale Discussion | SPC | Franklin, Habersham, Rabun, Stephens | 66 min |
| Oct 27, 1:44 AM CDT | Tornado Watch | SPC | Franklin, Habersham, Hart, Rabun, Stephens | 7 hr |
| Oct 27, 4:28 AM CDT | Mesoscale Discussion | SPC | Franklin, Habersham, Hart, Rabun, Stephens, Towns and 2 more | 2 hr |
| Oct 27, 1:06 PM CDT | Tornado Watch | SPC | Columbia, Elbert, Franklin, Hart, Lincoln, McDuffie | 6 hr |
| Oct 27, 3:03 PM CDT | Mesoscale Discussion | SPC | Lincoln | 87 min |
| Oct 27, 6:53 PM CDT | Mesoscale Discussion | SPC | Columbia, Lincoln | 67 min |
Nearby
Tornado Watches in Georgia, 2010Tornado Watches in Alabama, 2010Tornado Watches in Mississippi, 2010Every tornado watch in 2010
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.