Alert archive / Mississippi / Tornado Watches in 2009
Tornado Watch 130
The Storm Prediction Center issued this tornado watch at Apr 10, 2009, 1:43 AM CDT for 18 counties in Alabama; 29 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2009, 1:43 AM CDT (06:43 UTC)
- Expired
- Apr 10, 2009, 7:05 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 47 counties
Blount County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Morgan County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Hinds County, MS, Itawamba County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Lee County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Winston County, MS
The radar
The Columbus AFB radar (KGWX), 55 km from the middle of the area, began a volume at 06:46 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 1:53 AM CDT | Severe Thunderstorm Warning | JAN | Webster | 52 min |
| Apr 10, 2:26 AM CDT | Tornado Warning | JAN | Hinds, Issaquena, Madison, Warren, Yazoo | 20 min |
| Apr 10, 2:27 AM CDT | Severe Thunderstorm Warning | JAN | Clay | 48 min |
| Apr 10, 2:33 AM CDT | Severe Thunderstorm Warning | MEG | Monroe | 57 min |
| Apr 10, 3:13 AM CDT | Severe Thunderstorm Warning | JAN | Clay, Lowndes | 47 min |
| Apr 10, 3:20 AM CDT | Severe Thunderstorm Warning | BMX | Lamar | 40 min |
| Apr 10, 3:25 AM CDT | Severe Thunderstorm Warning | MEG | Monroe | 23 min |
| Apr 10, 3:50 AM CDT | Severe Thunderstorm Warning | BMX | Fayette, Lamar, Marion, Walker, Winston | 40 min |
| Apr 10, 4:00 AM CDT | Severe Thunderstorm Warning | BMX | Fayette, Lamar | 45 min |
| Apr 10, 4:25 AM CDT | Severe Thunderstorm Warning | BMX | Fayette, Marion, Walker, Winston | 35 min |
| Apr 10, 4:46 AM CDT | Severe Thunderstorm Warning | BMX | Fayette, Walker | 44 min |
| Apr 10, 5:20 AM CDT | Severe Thunderstorm Warning | HUN | Cullman | 25 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
Little Rock, AR (KLZK), launched 00:00Z, 6.7 hours before the alert went out and 138 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
- 366 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 379 m²/s²
- 0-3 km storm-relative helicity
- 460 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 5.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 1:24 AM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Marion and 1 more | 96 min |
| Apr 10, 4:25 AM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, Cullman, DeKalb and 13 more | 95 min |
| Apr 10, 8:22 AM CDT | Mesoscale Discussion | SPC | Lauderdale | 83 min |
| Apr 10, 11:14 AM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 4 more | 76 min |
| Apr 10, 11:23 AM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Cleburne, Colbert and 25 more | 8 hr |
| Apr 10, 12:58 PM CDT | Mesoscale Discussion | SPC | Colbert, Cullman, Fayette, Franklin, Jackson, Lamar and 8 more | 92 min |
| Apr 10, 2:29 PM CDT | Mesoscale Discussion | SPC | Cleburne | 91 min |
| Apr 10, 2:39 PM CDT | Tornado Watch | SPC | Autauga, Barbour, Bullock, Calhoun, Chambers, Cherokee and 19 more | 8 hr |
| Apr 10, 3:43 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, DeKalb, Etowah and 4 more | 92 min |
| Apr 10, 6:34 PM CDT | Mesoscale Discussion | SPC | Autauga, Calhoun, Chambers, Chilton, Clay, Cleburne and 9 more | 56 min |
| Apr 9, 10:48 PM CDT | Tornado Watch | SPC | Bolivar, Carroll, Coahoma, DeSoto, Grenada, Holmes and 17 more | 4 hr |
| Apr 10, 8:53 AM CDT | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Chickasaw, DeSoto, Itawamba and 11 more | 7 hr |
Nearby
Tornado Watches in Mississippi, 2009Tornado Watches in Alabama, 2009Every tornado watch in 2009
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.