Alert archive / Tennessee / Mesoscale Discussions in 2025
Mesoscale Discussion 643
The Storm Prediction Center issued this mesoscale discussion at May 2, 2025, 8:28 AM CDT for 4 states. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 2, 2025, 8:28 AM CDT (13:28 UTC)
- Expired
- May 2, 2025, 10:00 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...severe thunderstorm watch likely
- Chance of a watch
- 80%
All 73 counties
Colbert County, AL, Lauderdale County, AL, Allen County, KY, Barren County, KY, Calloway County, KY, Logan County, KY, Monroe County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
The radar
The Ft Campbell radar (KHPX), 151 km from the middle of the area, began a volume at 13:29 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 1.5 hours before the alert went out and 155 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
- 1065 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 597 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone | 8 hr |
| May 2, 11:29 AM CDT | Mesoscale Discussion | SPC | Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 4 more | 91 min |
| May 2, 1:02 PM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, DeKalb, Etowah, Fayette and 12 more | 118 min |
| May 2, 1:58 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 30 more | 7 hr |
| May 2, 3:03 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 19 more | 117 min |
| May 2, 5:34 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 12 more | 116 min |
| May 2, 12:57 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bath, Bell, Boone, Bourbon, Boyle and 72 more | 7 hr |
| May 2, 3:22 PM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Bell, Boone, Bourbon, Boyle and 57 more | 113 min |
| May 2, 9:39 AM CDT | Mesoscale Discussion | SPC | Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 40 more | 2 hr |
| May 2, 12:10 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 27 more | 9 hr |
| May 2, 1:47 PM CDT | Mesoscale Discussion | SPC | Adams, Attala, Carroll, Choctaw, Claiborne, Clay and 22 more | 118 min |
| May 2, 3:54 PM CDT | Mesoscale Discussion | SPC | Adams, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 29 more | 96 min |
Nearby
Mesoscale Discussions in Tennessee, 2025Mesoscale Discussions in Mississippi, 2025Mesoscale Discussions in Kentucky, 2025Every mesoscale discussion 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.