Alert archive / Oklahoma / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 747
The Storm Prediction Center issued this severe thunderstorm watch at Aug 12, 2004, 3:55 PM CDT for 41 counties in Oklahoma; 39 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2004, 3:55 PM CDT (20:55 UTC)
- Expired
- Aug 12, 2004, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 80 counties
Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hartley County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Moore County, TX, Motley County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Amarillo radar (KAMA), 128 km from the middle of the area, began a volume at 20:58 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
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 4:23 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 37 min |
| Aug 12, 4:26 PM CDT | Severe Thunderstorm Warning | OUN | Major | 34 min |
| Aug 12, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 48 min |
| Aug 12, 5:02 PM CDT | Severe Thunderstorm Warning | AMA | Deaf Smith | 58 min |
| Aug 12, 5:04 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth | 56 min |
| Aug 12, 5:19 PM CDT | Severe Thunderstorm Warning | LUB | Castro | 56 min |
| Aug 12, 5:26 PM CDT | Severe Thunderstorm Warning | AMA | Potter, Randall | 79 min |
| Aug 12, 5:31 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 44 min |
| Aug 12, 6:13 PM CDT | Tornado Warning | LUB | Castro | 32 min |
| Aug 12, 6:19 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa | 41 min |
| Aug 12, 6:41 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 49 min |
| Aug 12, 6:41 PM CDT | Severe Thunderstorm Warning | AMA | Randall | 64 min |
| Aug 12, 6:44 PM CDT | Severe Thunderstorm Warning | LUB | Motley | 61 min |
| Aug 12, 6:49 PM CDT | Tornado Warning | LUB | Castro | 26 min |
| Aug 12, 6:59 PM CDT | Tornado Warning | LUB | Lamb | 46 min |
| Aug 12, 7:17 PM CDT | Severe Thunderstorm Warning | LUB | Swisher | 58 min |
| Aug 12, 7:36 PM CDT | Severe Thunderstorm Warning | LUB | Castro | 54 min |
| Aug 12, 8:10 PM CDT | Severe Thunderstorm Warning | LUB | Parmer | 65 min |
| Aug 12, 8:44 PM CDT | Severe Thunderstorm Warning | LUB | Hale | 61 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.9 hours before the alert went out and 127 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
- 249 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 810 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 138 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 12, 1:16 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 23 more | 119 min |
| Aug 12, 6:21 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 35 more | 114 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2004Severe Thunderstorm Watches in Texas, 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.