Alert archive / Oklahoma / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 642
The Storm Prediction Center issued this severe thunderstorm watch at Aug 26, 2002, 10:35 PM CDT for 12 counties in Oklahoma; 10 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2002, 10:35 PM CDT (03:35 UTC)
- Expired
- Aug 27, 2002, 4:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Beaver County, OK, Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harper County, OK, Kiowa County, OK, Roger Mills County, OK, Texas County, OK, Washita County, OK, Woodward County, OK, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 179 km from the middle of the area, began a volume at 03:35 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 10:37 PM CDT | Severe Thunderstorm Warning | AMA | Beaver, Texas | 83 min |
| Aug 26, 10:51 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 54 min |
| Aug 26, 11:40 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb | 95 min |
| Aug 26, 11:46 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woodward | 59 min |
| Aug 26, 11:55 PM CDT | Severe Thunderstorm Warning | AMA | Beaver | 65 min |
| Aug 27, 12:35 AM CDT | Severe Thunderstorm Warning | OUN | Dewey, Ellis, Roger Mills, Woodward | 55 min |
| Aug 27, 1:07 AM CDT | Severe Thunderstorm Warning | OUN | Custer | 53 min |
| Aug 27, 1:32 AM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey | 43 min |
| Aug 27, 2:06 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian, Custer, Kingfisher, Washita | 54 min |
| Aug 27, 2:57 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Kiowa | 63 min |
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 3.6 hours before the alert went out and 182 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
- 882 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1721 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 13.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 1:30 AM CDT | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 17 more | 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, 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 Oklahoma, 2002Severe 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.