Alert archive / Louisiana / Mesoscale Discussions in 2025
Mesoscale Discussion 99
The Storm Prediction Center issued this mesoscale discussion at Feb 15, 2025, 5:49 PM CST for 9 parishes in Louisiana; Issaquena County, Sharkey County, Warren County, Mississippi. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Feb 15, 2025, 5:49 PM CST (23:49 UTC)
- Expired
- Feb 15, 2025, 7:15 PM CST
- In force
- 86 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 8
Counties Caldwell Parish, LA, Catahoula Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Issaquena County, MS, Sharkey County, MS, Warren County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 158 km from the middle of the area, began a volume at 23:51 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 nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 11.8 hours before the alert went out and 197 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
- 177 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 447 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 510 m²/s²
- 0-3 km storm-relative helicity
- 577 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.4
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 |
|---|---|---|---|---|
| Feb 15, 1:06 PM CST | Mesoscale Discussion | SPC | Bienville, Bossier, Claiborne, De Soto, Lincoln, Red River and 2 more | 3 hr |
| Feb 15, 4:00 PM CST | Tornado Watch | SPC | Avoyelles, Bienville, Bossier, Caddo, Caldwell, Catahoula and 23 more | 7 hr |
Nearby
Mesoscale Discussions in Louisiana, 2025Mesoscale Discussions in Mississippi, 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.