Alert archive / Texas / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 802
The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2008, 6:44 PM CDT for 9 parishes in Louisiana; 31 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2008, 6:44 PM CDT (23:44 UTC)
- Expired
- Aug 3, 2008, 9:41 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 40 counties
Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Lincoln Parish, LA, Red River Parish, LA, Union Parish, LA, Webster Parish, LA, Anderson County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Ellis County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Leon County, TX, Limestone County, TX, Marion County, TX, McLennan County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:59 PM CDT | Severe Thunderstorm Warning | FWD | Freestone | 76 min |
| Aug 3, 7:06 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Rusk, Smith | 24 min |
| Aug 3, 7:22 PM CDT | Severe Thunderstorm Warning | SHV | Caddo | 38 min |
| Aug 3, 7:33 PM CDT | Severe Thunderstorm Warning | FWD | Limestone | 57 min |
| Aug 3, 7:57 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Marion, Rusk | 63 min |
| Aug 3, 8:51 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Harrison, Marion, Rusk, Upshur | 24 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, 11.7 hours before the alert went out and 132 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
- 397 J/kg
- Mixed-layer CIN
- -465 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 6 hr |
| Aug 2, 10:57 PM CDT | Mesoscale Discussion | SPC | East Carroll, Madison, Tensas, West Carroll | 93 min |
| Aug 3, 1:17 AM CDT | Mesoscale Discussion | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Grant, Jackson and 6 more | 58 min |
| Aug 3, 10:50 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 21 more | 55 min |
| Aug 3, 1:07 PM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 24 more | 7 hr |
| Aug 3, 4:21 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 28 more | 54 min |
| Aug 3, 5:27 PM CDT | Mesoscale Discussion | SPC | Anderson, Cherokee, Freestone, Gregg, Harrison, Henderson and 8 more | 63 min |
Nearby
Severe Thunderstorm Watches in Texas, 2008Severe Thunderstorm Watches in Louisiana, 2008Every severe thunderstorm watch in 2008
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.