Alert archive / Mississippi / Mesoscale Discussions in 2023
Mesoscale Discussion 765
The Storm Prediction Center issued this mesoscale discussion at May 11, 2023, 3:02 PM CDT for Choctaw County, Sumter County, Alabama; Washington Parish, Louisiana; 31 counties in Mississippi. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- May 11, 2023, 3:02 PM CDT (20:02 UTC)
- Expired
- May 11, 2023, 4:30 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 212
All 34 counties
Choctaw County, AL, Sumter County, AL, Washington Parish, LA, Amite County, MS, Attala County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wayne County, MS, Winston County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 44 km from the middle of the area, began a volume at 20:06 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
Jackson, MS (KJAN), launched 12:00Z, 8.0 hours before the alert went out and 52 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
- 522 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 |
|---|---|---|---|---|
| May 11, 9:00 AM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, Catahoula, Claiborne, Concordia, De Soto and 19 more | 3 hr |
| May 11, 9:24 AM CDT | Tornado Watch | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Concordia, De Soto and 19 more | 8 hr |
| May 11, 12:22 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Caldwell, Catahoula, Concordia, East Carroll, East Feliciana and 17 more | 53 min |
| May 11, 12:45 PM CDT | Tornado Watch | SPC | East Feliciana, Pointe Coupee, Saint Helena, Tangipahoa, Washington, West Feliciana | 7 hr |
Nearby
Mesoscale Discussions in Mississippi, 2023Mesoscale Discussions in Alabama, 2023Mesoscale Discussions in Louisiana, 2023Every mesoscale discussion in 2023
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.