Alert archive / Alabama / Tornado Watches in 2010
Tornado Watch 99
The Storm Prediction Center issued this tornado watch at Apr 24, 2010, 7:11 PM CDT for 33 counties in Alabama; 30 counties in Georgia; 6 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2010, 7:11 PM CDT (00:11 UTC)
- Expired
- Apr 25, 2010, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 69 counties
Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Marengo County, AL, Marshall County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Wilcox County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Heard County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Clarke County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Newton County, MS, Noxubee County, MS
The radar
The Birmingham radar (KBMX), 81 km from the middle of the area, began a volume at 00:14 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
- 50%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:12 PM CDT | Tornado Warning | HUN | Cullman, Marshall, Morgan | 33 min |
| Apr 24, 7:13 PM CDT | Tornado Warning | BMX | Fayette, Lamar, Pickens | 47 min |
| Apr 24, 7:24 PM CDT | Severe Thunderstorm Warning | BMX | Fayette, Lamar | 36 min |
| Apr 24, 7:35 PM CDT | Tornado Warning | JAN | Kemper | 55 min |
| Apr 24, 7:41 PM CDT | Tornado Warning | HUN | Madison, Marshall | 34 min |
| Apr 24, 7:44 PM CDT | Tornado Warning | BMX | Fayette, Pickens, Tuscaloosa | 46 min |
| Apr 24, 7:48 PM CDT | Severe Thunderstorm Warning | BMX | Pickens | 27 min |
| Apr 24, 7:58 PM CDT | Flash Flood Warning | BMX | Fayette, Lamar, Pickens | 3 hr |
| Apr 24, 8:09 PM CDT | Tornado Warning | BMX | Fayette, Pickens, Tuscaloosa | 25 min |
| Apr 24, 8:11 PM CDT | Tornado Warning | HUN | DeKalb, Jackson, Marshall | 34 min |
| Apr 24, 8:15 PM CDT | Tornado Warning | BMX | Fayette, Walker | 45 min |
| Apr 24, 8:36 PM CDT | Flash Flood Warning | HUN | Cullman | 4 hr |
| Apr 24, 8:53 PM CDT | Tornado Warning | HUN | Cullman | 37 min |
| Apr 24, 9:11 PM CDT | Tornado Warning | BMX | Blount | 49 min |
| Apr 24, 9:15 PM CDT | Severe Thunderstorm Warning | JAN | Kemper, Lauderdale | 45 min |
| Apr 24, 9:37 PM CDT | Tornado Warning | BMX | Greene, Sumter | 20 min |
| Apr 24, 10:01 PM CDT | Tornado Warning | BMX | Walker | 29 min |
| Apr 24, 10:15 PM CDT | Tornado Warning | HUN | DeKalb, Marshall | 30 min |
| Apr 24, 10:22 PM CDT | Tornado Warning | BMX | Blount, Jefferson, Walker | 38 min |
| Apr 24, 10:40 PM CDT | Tornado Warning | HUN | DeKalb | 35 min |
| Apr 24, 10:56 PM CDT | Tornado Warning | FFC | Chattooga, Dade, Walker | 64 min |
| Apr 24, 11:12 PM CDT | Tornado Warning | HUN | DeKalb | 27 min |
| Apr 24, 11:21 PM CDT | Tornado Warning | HUN | DeKalb | 17 min |
| Apr 24, 11:33 PM CDT | Tornado Warning | BMX | Etowah, St. Clair | 42 min |
| Apr 24, 11:40 PM CDT | Severe Thunderstorm Warning | BMX | Bibb, Chilton, Hale, Shelby, Tuscaloosa | 26 min |
| Apr 24, 11:41 PM CDT | Severe Thunderstorm Warning | BMX | Blount, Jefferson | 38 min |
| Apr 24, 11:42 PM CDT | Tornado Warning | HUN | DeKalb | 33 min |
| Apr 24, 11:44 PM CDT | Flash Flood Warning | HUN | DeKalb | 3 hr |
| Apr 24, 11:48 PM CDT | Tornado Warning | FFC | Walker, Whitfield | 42 min |
| Apr 25, 12:07 AM CDT | Tornado Warning | BMX | Cherokee | 9 min |
| Apr 25, 12:07 AM CDT | Severe Thunderstorm Warning | FFC | Fannin, Gilmer, Murray | 38 min |
| Apr 25, 12:09 AM CDT | Tornado Warning | HUN | DeKalb | 36 min |
| Apr 25, 12:18 AM CDT | Tornado Warning | BMX | Cherokee | 27 min |
| Apr 25, 12:18 AM CDT | Tornado Warning | FFC | Chattooga | 49 min |
| Apr 25, 12:40 AM CDT | Severe Thunderstorm Warning | BMX | Cherokee, Etowah | 33 min |
| Apr 25, 12:40 AM CDT | Flash Flood Warning | FFC | Walker, Whitfield | 113 min |
| Apr 25, 12:40 AM CDT | Tornado Warning | FFC | Fannin, Gilmer, Murray | 30 min |
| Apr 25, 12:49 AM CDT | Severe Thunderstorm Warning | FFC | Chattooga, Floyd | 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 00:00Z, 0.2 hours before the alert went out and 81 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
- 1231 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 483 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 415 m²/s²
- 0-3 km storm-relative helicity
- 438 m²/s²
- Significant tornado parameter
- 3.6
- Supercell composite
- 15.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:19 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 11 more | 56 min |
| Apr 24, 9:58 PM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Chambers, Coffee and 13 more | 32 min |
| Apr 24, 10:46 PM CDT | Tornado Watch | SPC | Barbour, Bullock, Butler, Chambers, Coffee, Covington and 12 more | 7 hr |
| Apr 24, 11:27 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 25 more | 63 min |
| Apr 25, 3:01 AM CDT | Mesoscale Discussion | SPC | Henry, Houston | 89 min |
| Apr 24, 11:55 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Butts, Clarke, Columbia, Elbert and 25 more | 35 min |
| Apr 25, 12:17 AM CDT | Tornado Watch | SPC | Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 101 more | 8 hr |
| Apr 25, 5:38 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Baker, Ben Hill, Berrien, Brooks and 32 more | 67 min |
Nearby
Tornado Watches in Alabama, 2010Tornado Watches in Georgia, 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.