Alert archive / Texas / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 502
The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2004, 6:25 PM CDT for 10 counties in Oklahoma; 19 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2004, 6:25 PM CDT (23:25 UTC)
- Expired
- Jun 21, 2004, 12:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 29 counties
Beaver County, OK, Beckham County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:00 PM CDT | Severe Thunderstorm Warning | AMA | Sherman | 60 min |
| Jun 20, 8:36 PM CDT | Severe Thunderstorm Warning | AMA | Moore | 54 min |
| Jun 20, 10:08 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 37 min |
| Jun 20, 10:46 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 59 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, 11.4 hours before the alert went out and 73 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
- 1316 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 2:32 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 118 min |
| Jun 20, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Cimarron | 6 hr |
| Jun 20, 5:48 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Ellis, Harper, Roger Mills and 1 more | 87 min |
| Jun 19, 7:27 PM CDT | Mesoscale Discussion | SPC | Hartley | 93 min |
| Jun 20, 5:30 PM CDT | Mesoscale Discussion | SPC | Borden, Coke, Crane, Crockett, Dawson, Dickens and 19 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2004Severe Thunderstorm Watches in Oklahoma, 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.