Alert archive / Louisiana / Mesoscale Discussions in 2004
Mesoscale Discussion 324
The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2004, 7:19 PM CDT for 6 counties in Arkansas; 18 parishes in Louisiana; San Augustine County, Texas. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2004, 7:19 PM CDT (00:19 UTC)
- Expired
- Apr 10, 2004, 8:45 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 25 counties
Ashley County, AR, Bradley County, AR, Calhoun County, AR, Columbia County, AR, Drew County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Franklin Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA, San Augustine County, TX
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.3 hours before the alert went out and 78 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
- 1441 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 25 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 |
|---|---|---|---|---|
| Apr 11, 3:13 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, Jefferson, Lafourche, Orleans, Plaquemines and 7 more | 92 min |
| Apr 11, 10:14 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 3 more | 4 hr |
| Apr 11, 1:45 PM CDT | Mesoscale Discussion | SPC | Acadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 2 more | 3 hr |
| Apr 10, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 2 more | 3 hr |
| Apr 10, 9:20 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Kenedy, Starr, Willacy | 85 min |
| Apr 10, 9:35 PM CDT | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more | 5 hr |
| Apr 10, 10:52 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bee, Bexar, DeWitt, Dimmit, Duval and 14 more | 2 hr |
| Apr 11, 1:39 AM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more | 66 min |
Nearby
Mesoscale Discussions in Louisiana, 2004Mesoscale Discussions in Arkansas, 2004Mesoscale Discussions in Texas, 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.