Alert archive / Mississippi / Tornado Watches in 2025
Tornado Watch 307
The Storm Prediction Center issued this tornado watch at May 20, 2025, 5:50 PM CDT for 6 parishes in Louisiana; 33 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2025, 5:50 PM CDT (22:50 UTC)
- Expired
- May 20, 2025, 11:18 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 39 counties
Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA, Adams County, MS, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 55 km from the middle of the area, began a volume at 22:53 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
- 60%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- 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
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 5:51 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Grenada, Leflore, Sunflower | 54 min |
| May 20, 6:26 PM CDT | Severe Thunderstorm Warning | JAN | Holmes, Humphreys, Sharkey, Yazoo | 79 min |
| May 20, 6:39 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Grenada, Montgomery | 51 min |
| May 20, 7:19 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 56 min |
| May 20, 7:21 PM CDT | Severe Thunderstorm Warning | JAN | Humphreys, Issaquena, Sharkey, Yazoo | 54 min |
| May 20, 7:28 PM CDT | Tornado Warning | JAN | Sharkey, Yazoo | 28 min |
| May 20, 7:34 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Holmes, Leake, Madison | 32 min |
| May 20, 8:14 PM CDT | Severe Thunderstorm Warning | JAN | Sharkey, Yazoo | 61 min |
| May 20, 8:22 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 35 min |
| May 20, 8:38 PM CDT | Severe Thunderstorm Warning | JAN | Leake, Madison | 67 min |
| May 20, 8:53 PM CDT | Severe Thunderstorm Warning | JAN | Madison, Yazoo | 46 min |
| May 20, 9:18 PM CDT | Severe Thunderstorm Warning | JAN | Leake, Madison, Rankin, Scott | 57 min |
| May 20, 9:52 PM CDT | Severe Thunderstorm Warning | JAN | Newton, Scott | 39 min |
| May 20, 10:08 PM CDT | Severe Thunderstorm Warning | JAN | Concordia | 22 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 12:00Z, 10.8 hours before the alert went out and 49 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
- 1034 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 577 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 9.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 1:21 AM CDT | Mesoscale Discussion | SPC | Bossier, Caddo, Webster | 54 min |
| May 20, 1:57 AM CDT | Severe Thunderstorm Watch | SPC | Bossier, Caddo, Webster | 5 hr |
| May 20, 4:21 AM CDT | Mesoscale Discussion | SPC | Bossier, Webster | 54 min |
| May 20, 1:14 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caldwell, Claiborne, De Soto, East Carroll and 17 more | 2 hr |
| May 20, 3:13 PM CDT | Severe Thunderstorm Watch | SPC | Bienville, Caldwell, Catahoula, Claiborne, Concordia, De Soto and 18 more | 6 hr |
| May 20, 5:08 PM CDT | Mesoscale Discussion | SPC | Madison | 2 hr |
| May 20, 12:34 PM CDT | Mesoscale Discussion | SPC | Bolivar, Coahoma, DeSoto, Humphreys, Leflore, Marshall and 7 more | 116 min |
| May 20, 1:09 PM CDT | Tornado Watch | SPC | Alcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 26 more | 8 hr |
| May 20, 3:33 PM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 22 more | 117 min |
| May 20, 5:38 PM CDT | Mesoscale Discussion | SPC | Calhoun, Carroll, Grenada, Holmes, Humphreys, Lafayette and 7 more | 97 min |
Nearby
Tornado Watches in Mississippi, 2025Tornado Watches in Louisiana, 2025Every tornado watch in 2025
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.