Alert archive / Oklahoma / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 295
The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2015, 3:55 PM CDT for 31 counties in Oklahoma; Foard County, Hardeman County, Wilbarger County, Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2015, 3:55 PM CDT (20:55 UTC)
- Expired
- Jun 12, 2015, 9:55 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 34 counties
Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 94 km from the middle of the area, began a volume at 20:57 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
- 10%
- 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
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 4:14 PM CDT | Severe Thunderstorm Warning | OUN | Harmon | 46 min |
| Jun 12, 4:26 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Major, Woodward | 49 min |
| Jun 12, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 34 min |
| Jun 12, 5:19 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon | 41 min |
| Jun 12, 5:37 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey | 38 min |
| Jun 12, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 46 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 226 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
- 153 J/kg
- Mixed-layer CIN
- -247 J/kg
- Mixed-layer LCL
- 1122 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -81 m²/s²
- 0-3 km storm-relative helicity
- -39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 7:10 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Harper, Texas | 95 min |
| Jun 11, 9:48 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Harper, Texas | 87 min |
| Jun 11, 11:10 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper, Texas, Woodward | 65 min |
| Jun 12, 3:30 PM CDT | Mesoscale Discussion | SPC | Beckham, Custer, Greer, Harmon, Jackson, Kiowa and 2 more | 2 hr |
| Jun 12, 3:52 PM CDT | Mesoscale Discussion | SPC | Craig, Delaware, Mayes, Nowata, Ottawa, Rogers and 2 more | 83 min |
| Jun 12, 6:23 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 22 more | 97 min |
| Jun 12, 1:44 PM CDT | Mesoscale Discussion | SPC | Andrews, Bailey, Borden, Cochran, Crane, Dawson and 17 more | 2 hr |
| Jun 12, 2:47 PM CDT | Tornado Watch | SPC | Andrews, Armstrong, Bailey, Borden, Brewster, Briscoe and 45 more | 7 hr |
| Jun 12, 5:39 PM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Borden, Briscoe, Castro, Cochran and 30 more | 96 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2015Severe Thunderstorm Watches in Texas, 2015Every severe thunderstorm watch in 2015
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.