Alert archive / Mississippi / Tornado Watches in 2024
Tornado Watch 668
The Storm Prediction Center issued this tornado watch at Sep 11, 2024, 10:13 PM CDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 2024, 10:13 PM CDT (03:13 UTC)
- Expired
- Sep 12, 2024, 6:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Strongest gust expected
- 50 kt
All 21 counties
Baldwin County, AL, Mobile County, AL, Washington County, AL, Bay County, FL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS
The radar
The Mobile radar (KMOB), 34 km from the middle of the area, began a volume at 03:17 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
- 5%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 20%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 10:42 PM CDT | Flash Flood Warning | LIX | Harrison, Jackson | 3 hr |
| Sep 11, 11:51 PM CDT | Flash Flood Warning | LIX | Saint Tammany, Washington | 3 hr |
| Sep 12, 5:13 AM CDT | Tornado Warning | MOB | Okaloosa | 15 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
Jackson, MS (KJAN), launched 00:00Z, 3.2 hours before the alert went out and 224 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
- 39 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 5:01 AM CDT | Mesoscale Discussion | SPC | Butler, Clarke, Coffee, Conecuh, Covington, Crenshaw and 6 more | 3 hr |
| Sep 12, 5:53 AM CDT | Tornado Watch | SPC | Butler, Coffee, Conecuh, Covington, Crenshaw, Dale and 6 more | 7 hr |
| Sep 12, 10:06 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Butler, Coffee, Conecuh and 15 more | 2 hr |
| Sep 12, 2:40 PM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Chilton, Coosa and 13 more | 3 hr |
| Sep 12, 4:35 PM CDT | Tornado Watch | SPC | Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 6 more | 4 hr |
| Sep 11, 7:20 PM CDT | Mesoscale Discussion | SPC | Orleans, Saint Bernard, Saint Charles, Saint John the Baptist, Saint Tammany, Tangipahoa | 85 min |
Nearby
Tornado Watches in Mississippi, 2024Tornado Watches in Florida, 2024Tornado Watches in Alabama, 2024Every tornado watch in 2024
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.