Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 286
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2004, 6:08 PM CDT for 5 states. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2004, 6:08 PM CDT (23:08 UTC)
- Expired
- Apr 7, 2004, 7:15 PM CDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 107 counties
Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Saline County, AR, Sevier County, AR, Union County, AR, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Choctaw County, OK, McCurtain County, OK, Pushmataha County, OK, Anderson County, TX, Angelina County, TX, Bowie County, TX, Brazos County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Jasper County, TX, Lamar County, TX, Leon County, TX, Madison County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 65 km from the middle of the area, began a volume at 23:11 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 11.1 hours before the alert went out and 74 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
- 138 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 766 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 85 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 7, 12:58 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Hempstead, Howard, Lafayette, Little River and 7 more | 2 hr |
| Apr 7, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 23 more | 5 hr |
| Apr 7, 2:45 PM CDT | Severe Thunderstorm Watch | SPC | Bossier, Caddo, Claiborne, De Soto, Red River, Webster | 5 hr |
| Apr 7, 5:06 PM CDT | Mesoscale Discussion | SPC | Plaquemines, Saint Bernard | 114 min |
| Apr 7, 4:47 PM CDT | Mesoscale Discussion | SPC | Attala, Carroll, Choctaw, Clay, Grenada, Hinds and 23 more | 28 min |
| Apr 7, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | Attala, Bolivar, Carroll, Choctaw, Clay, Grenada and 20 more | 6 hr |
| Apr 7, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Greene | 5 hr |
| Apr 6, 8:21 PM CDT | Mesoscale Discussion | SPC | Collin, Dallas, Denton, Ellis, Henderson, Hill and 12 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Louisiana, 2004Mesoscale Discussions in Arkansas, 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.