Alert archive / Mississippi / Mesoscale Discussions in 2025
Mesoscale Discussion 2183
The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2025, 3:32 AM CDT for 6 parishes in Louisiana; 9 counties in Mississippi. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Oct 26, 2025, 3:32 AM CDT (08:32 UTC)
- Expired
- Oct 26, 2025, 5:30 AM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
Counties Orleans Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Forrest County, MS, Hancock County, MS, Harrison County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Stone County, MS, Walthall County, MS
The radar
The Hammond radar (KHDC), 46 km from the middle of the area, began a volume at 08:33 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 8.5 hours before the alert went out and 44 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
- 584 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
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 |
|---|---|---|---|---|
| Oct 25, 9:40 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 20 more | 2 hr |
| Oct 25, 11:03 PM CDT | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 22 more | 7 hr |
| Oct 26, 1:37 AM CDT | Mesoscale Discussion | SPC | East Baton Rouge, East Feliciana, Iberville, Lafayette, Pointe Coupee, Saint Landry and 3 more | 83 min |
| Oct 26, 5:23 AM CDT | Tornado Watch | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 3 more | 9 hr |
| Oct 26, 6:17 AM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Saint Charles, Saint John the Baptist, Saint Tammany and 1 more | 88 min |
| Oct 26, 8:51 AM CDT | Mesoscale Discussion | SPC | George, Greene, Jackson, Perry | 84 min |
Nearby
Mesoscale Discussions in Mississippi, 2025Mesoscale Discussions in Louisiana, 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.