Alert archive / Mississippi / Mesoscale Discussions in 2005
Mesoscale Discussion 221
The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2005, 3:08 PM CST for 20 parishes in Louisiana; 29 counties in Mississippi. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2005, 3:08 PM CST (21:08 UTC)
- Expired
- Feb 23, 2005, 5:15 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 49 counties
Acadia Parish, LA, Ascension Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.1 hours before the alert went out and 159 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
- 201 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 597 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 7:50 AM CST | Mesoscale Discussion | SPC | Beauregard, De Soto, Grant, Natchitoches, Rapides, Red River and 2 more | 115 min |
| Feb 23, 10:35 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Avoyelles, Beauregard, Bienville and 37 more | 115 min |
| Feb 23, 11:45 AM CST | Severe Thunderstorm Watch | SPC | Allen, Avoyelles, Caldwell, Catahoula, Concordia, East Baton Rouge and 15 more | 6 hr |
| Feb 23, 12:13 PM CST | Mesoscale Discussion | SPC | East Carroll, West Carroll | 2 hr |
Nearby
Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Louisiana, 2005Every mesoscale discussion in 2005
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.