Alert archive / Mississippi / Mesoscale Discussions in 2004
Mesoscale Discussion 508
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2004, 11:41 PM CDT for Colbert County, Franklin County, Lauderdale County, Alabama; 37 counties in Mississippi. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2004, 11:41 PM CDT (04:41 UTC)
- Expired
- Apr 30, 2004, 12:45 AM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 40 counties
Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Itawamba County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lawrence County, MS, Leake County, MS, Lee 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, Prentiss County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Winston County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 83 km from the middle of the area, began a volume at 04:43 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 00:00Z, 4.7 hours before the alert went out and 86 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
- 851 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 851 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 2.8
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 |
|---|---|---|---|---|
| Apr 29, 7:51 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile, Monroe | 54 min |
| Apr 29, 8:55 PM CDT | Tornado Watch | SPC | Baldwin, Coffee, Covington, Dale, Escambia, Geneva and 3 more | 5 hr |
| Apr 29, 9:25 PM CDT | Tornado Watch | SPC | Colbert, Franklin, Lauderdale | 5 hr |
| Apr 29, 11:09 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Escambia, Geneva and 3 more | 96 min |
| Apr 30, 1:21 AM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Escambia, Geneva and 3 more | 24 min |
| Apr 29, 8:58 PM CDT | Mesoscale Discussion | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clarke and 28 more | 62 min |
Nearby
Mesoscale Discussions in Mississippi, 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; radar from the NEXRAD Level II archive.