Alert archive / Texas / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 508
The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 2004, 11:55 AM CDT for 7 parishes in Louisiana; 20 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2004, 11:55 AM CDT (16:55 UTC)
- Expired
- Jun 22, 2004, 5:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Beauregard Parish, LA, Calcasieu Parish, LA, De Soto Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Angelina County, TX, Brazoria County, TX, Chambers County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Tyler County, TX
The radar
The Houston radar (KHGX), 98 km from the middle of the area, began a volume at 16:57 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.
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 2:10 PM CDT | Severe Thunderstorm Warning | SHV | Angelina | 35 min |
| Jun 22, 2:38 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches | 37 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 4.9 hours before the alert went out and 263 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
- 1624 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 10:27 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 30 more | 2 hr |
| Jun 22, 3:10 PM CDT | Mesoscale Discussion | SPC | Beauregard, Bienville, Bossier, Caddo, Calcasieu, Claiborne and 11 more | 95 min |
| Jun 21, 8:05 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Baylor, Briscoe, Carson, Castro, Childress and 27 more | 7 hr |
| Jun 21, 10:17 PM CDT | Mesoscale Discussion | SPC | Archer, Armstrong, Baylor, Briscoe, Carson, Castro and 28 more | 88 min |
| Jun 21, 11:27 PM CDT | Mesoscale Discussion | SPC | Clay | 93 min |
| Jun 21, 11:44 PM CDT | Mesoscale Discussion | SPC | Armstrong, Baylor, Borden, Briscoe, Callahan, Carson and 56 more | 91 min |
| Jun 22, 2:48 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Crosby, Dickens, Foard and 7 more | 27 min |
| Jun 22, 4:05 AM CDT | Mesoscale Discussion | SPC | Archer, Clay, Cooke, Montague | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2004Severe Thunderstorm Watches in Louisiana, 2004Every severe thunderstorm watch 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.