Alert archive / Texas / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 487
The Storm Prediction Center issued this severe thunderstorm watch at Aug 8, 2013, 3:21 PM CDT for 13 counties in Oklahoma; 56 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2013, 3:21 PM CDT (20:21 UTC)
- Expired
- Aug 9, 2013, 12:00 AM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 69 counties
Beaver County, OK, Beckham County, OK, Cimarron County, OK, Custer County, OK, Dewey County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Texas County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Armstrong County, TX, Bailey County, TX, Baylor County, TX, Briscoe County, TX, Callahan County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dallam County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Hartley County, TX, Haskell County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Moore County, TX, Motley County, TX, Nolan County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Shackelford County, TX, Sherman County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Amarillo radar (KAMA), 44 km from the middle of the area, began a volume at 20:24 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 4:05 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 40 min |
| Aug 8, 4:16 PM CDT | Severe Thunderstorm Warning | LUB | Kent, Stonewall | 29 min |
| Aug 8, 4:17 PM CDT | Severe Thunderstorm Warning | OUN | Baylor | 43 min |
| Aug 8, 4:27 PM CDT | Severe Thunderstorm Warning | SJT | Fisher | 63 min |
| Aug 8, 4:52 PM CDT | Severe Thunderstorm Warning | LUB | Stonewall | 38 min |
| Aug 8, 5:06 PM CDT | Severe Thunderstorm Warning | SJT | Jones | 39 min |
| Aug 8, 5:06 PM CDT | Severe Thunderstorm Warning | SJT | Nolan | 39 min |
| Aug 8, 5:10 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Hall | 35 min |
| Aug 8, 5:21 PM CDT | Severe Thunderstorm Warning | SJT | Haskell | 39 min |
| Aug 8, 5:28 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 47 min |
| Aug 8, 5:29 PM CDT | Severe Thunderstorm Warning | LUB | Stonewall | 31 min |
| Aug 8, 5:40 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Hall | 35 min |
| Aug 8, 5:55 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Hall | 20 min |
| Aug 8, 5:59 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 61 min |
| Aug 8, 6:02 PM CDT | Severe Thunderstorm Warning | SJT | Haskell | 43 min |
| Aug 8, 6:11 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 49 min |
| Aug 8, 6:18 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 42 min |
| Aug 8, 6:24 PM CDT | Severe Thunderstorm Warning | SJT | Callahan, Shackelford | 51 min |
| Aug 8, 6:28 PM CDT | Severe Thunderstorm Warning | SJT | Jones | 47 min |
| Aug 8, 6:29 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Hall | 31 min |
| Aug 8, 6:31 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor, Knox | 59 min |
| Aug 8, 6:53 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa | 52 min |
| Aug 8, 6:57 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Wilbarger | 48 min |
| Aug 8, 7:44 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Jackson, Kiowa, Tillman | 46 min |
| Aug 8, 8:08 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray, Hutchinson, Potter, Roberts | 67 min |
| Aug 8, 8:19 PM CDT | Severe Thunderstorm Warning | AMA | Deaf Smith | 56 min |
| Aug 8, 8:33 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 42 min |
| Aug 8, 8:36 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Kiowa, Tillman | 39 min |
| Aug 8, 8:51 PM CDT | Severe Thunderstorm Warning | AMA | Hansford, Hutchinson | 54 min |
| Aug 8, 8:57 PM CDT | Severe Thunderstorm Warning | AMA | Gray, Hemphill, Roberts, Wheeler | 63 min |
| Aug 8, 9:11 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 49 min |
| Aug 8, 9:56 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth | 64 min |
| Aug 8, 10:00 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey | 30 min |
| Aug 8, 10:16 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Donley | 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
Dodge City, (KDDC), launched 12:00Z, 8.4 hours before the alert went out and 350 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
- 124 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:16 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 89 min |
| Aug 7, 9:02 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 6 more | 88 min |
| Aug 7, 10:24 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 17 more | 7 hr |
| Aug 7, 11:30 PM CDT | Mesoscale Discussion | SPC | Beaver, Texas | 60 min |
| Aug 8, 3:18 AM CDT | Mesoscale Discussion | SPC | Creek, Kay, Lincoln, Logan, Noble, Nowata and 7 more | 87 min |
| Aug 8, 3:57 AM CDT | Severe Thunderstorm Watch | SPC | Craig, Delaware, Mayes, Nowata, Osage, Ottawa and 3 more | 3 hr |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 2 more | 60 min |
| Aug 8, 5:02 PM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Carter, Cleveland, Coal and 30 more | 88 min |
| Aug 8, 5:24 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 1 more | 66 min |
| Aug 8, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Cherokee, Creek, Delaware, Haskell, Latimer and 11 more | 6 hr |
| Aug 8, 6:23 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 22 more | 8 hr |
| Aug 8, 6:47 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Custer, Dewey, Greer and 7 more | 88 min |
Nearby
Severe Thunderstorm Watches in Texas, 2013Severe Thunderstorm Watches in Oklahoma, 2013Every severe thunderstorm watch in 2013
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.