Alert archive / Mississippi / Mesoscale Discussions in 2004
Mesoscale Discussion 177
The Storm Prediction Center issued this mesoscale discussion at Mar 5, 2004, 4:50 PM CST for Lamar County, Marion County, Pickens County, Alabama; 6 parishes in Louisiana; 46 counties in Mississippi. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Mar 5, 2004, 4:50 PM CST (22:50 UTC)
- Expired
- Mar 5, 2004, 6:45 PM CST
- In force
- 115 min
- Issued by
- the Storm Prediction Center
All 55 counties
Lamar County, AL, Marion County, AL, Pickens County, AL, Avoyelles Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, Madison Parish, LA, Tensas Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Jefferson County, MS, Kemper County, MS, Lafayette County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Union County, MS, Warren County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 10.8 hours before the alert went out and 41 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
- 75 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 683 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 283 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Mar 5, 5:40 PM CST | Tornado Watch | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 7 more | 5 hr |
| Mar 4, 6:15 PM CST | Tornado Watch | SPC | East Carroll, Lincoln, Morehouse, Union, West Carroll | 5 hr |
| Mar 4, 9:24 PM CST | Mesoscale Discussion | SPC | Bolivar, Coahoma, DeSoto, Quitman, Tate, Tunica | 66 min |
| Mar 5, 12:57 AM CST | Mesoscale Discussion | SPC | Benton, DeSoto, Marshall, Tate, Tippah | 63 min |
Nearby
Mesoscale Discussions in Mississippi, 2004Mesoscale Discussions in Louisiana, 2004Mesoscale Discussions in Alabama, 2004Every mesoscale discussion in 2004
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.