Alert archive / Texas / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 644
The Storm Prediction Center issued this severe thunderstorm watch at Aug 27, 2002, 3:40 AM CDT for 44 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2002, 3:40 AM CDT (08:40 UTC)
- Expired
- Aug 27, 2002, 9:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Knox County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Mills County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 31 km from the middle of the area, began a volume at 08:39 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 4:33 AM CDT | Severe Thunderstorm Warning | OUN | Clay | 57 min |
| Aug 27, 4:42 AM CDT | Severe Thunderstorm Warning | OUN | Archer | 48 min |
| Aug 27, 4:45 AM CDT | Severe Thunderstorm Warning | FWD | Montague | 60 min |
| Aug 27, 4:45 AM CDT | Severe Thunderstorm Warning | FWD | Collin | 23 hr |
| Aug 27, 4:50 AM CDT | Severe Thunderstorm Warning | FWD | Cooke | 55 min |
| Aug 27, 5:08 AM CDT | Severe Thunderstorm Warning | FWD | Jack, Wise | 52 min |
| Aug 27, 5:43 AM CDT | Severe Thunderstorm Warning | FWD | Cooke, Grayson | 62 min |
| Aug 27, 6:04 AM CDT | Severe Thunderstorm Warning | FWD | Denton | 56 min |
| Aug 27, 6:29 AM CDT | Severe Thunderstorm Warning | FWD | Collin, Dallas, Tarrant | 61 min |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 8.7 hours before the alert went out and 19 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
- 2219 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 2011 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.8
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, 6:45 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Bowie, Camp, Cass, Cherokee and 24 more | 4 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.