Alert archive / Texas / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 645
The Storm Prediction Center issued this severe thunderstorm watch at Aug 27, 2002, 6:45 AM CDT for 30 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2002, 6:45 AM CDT (11:45 UTC)
- Expired
- Aug 27, 2002, 11:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Anderson County, TX, Angelina County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Rusk County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 108 km from the middle of the area, began a volume at 11:46 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:27 AM CDT | Flash Flood Warning | FWD | Fannin | 3 hr |
| Aug 27, 8:22 AM CDT | Severe Thunderstorm Warning | FWD | Hopkins, Rains | 38 min |
| Aug 27, 8:23 AM CDT | Severe Thunderstorm Warning | SHV | Franklin, Wood | 52 min |
| Aug 27, 8:48 AM CDT | Severe Thunderstorm Warning | SHV | Camp, Upshur | 57 min |
| Aug 27, 9:13 AM CDT | Severe Thunderstorm Warning | SHV | Gregg, Smith | 62 min |
| Aug 27, 9:27 AM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Rusk | 63 min |
| Aug 27, 9:32 AM CDT | Severe Thunderstorm Warning | SHV | Harrison | 43 min |
| Aug 27, 9:51 AM CDT | Severe Thunderstorm Warning | SHV | Panola | 54 min |
| Aug 27, 10:21 AM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Shelby | 54 min |
| Aug 27, 10:23 AM CDT | Severe Thunderstorm Warning | HGX | Houston | 97 min |
| Aug 27, 10:51 AM CDT | Severe Thunderstorm Warning | SHV | Angelina, San Augustine | 54 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 11.8 hours before the alert went out and 115 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
- 1112 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1861 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Collingsworth, Donley, Gray, Hansford, Hemphill, Hutchinson and 4 more | 5 hr |
| Aug 27, 1:30 AM CDT | Severe Thunderstorm Watch | SPC | Hemphill | 5 hr |
| Aug 27, 3:40 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 38 more | 5 hr |
| Aug 27, 10:45 AM CDT | Severe Thunderstorm Watch | SPC | Angelina, Chambers, Hardin, Houston, Jasper, Jefferson and 9 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2002Every severe thunderstorm watch in 2002
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.