Alert archive / Oklahoma / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 443
The Storm Prediction Center issued this severe thunderstorm watch at Aug 10, 2017, 2:06 PM CDT for 4 counties in Kansas; 39 counties in Oklahoma. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2017, 2:06 PM CDT (19:06 UTC)
- Expired
- Aug 10, 2017, 9:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 43 counties
Barber County, KS, Comanche County, KS, Harper County, KS, Sumner County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harper County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, McClain County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Rogers County, OK, Seminole County, OK, Washington County, OK, Washita County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 94 km from the middle of the area, began a volume at 19:08 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
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
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 10, 2:58 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 47 min |
| Aug 10, 3:26 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey, Major | 49 min |
| Aug 10, 3:59 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey, Kingfisher, Major | 46 min |
| Aug 10, 4:03 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Grady | 42 min |
| Aug 10, 4:27 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 48 min |
| Aug 10, 4:34 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Canadian, Kingfisher | 41 min |
| Aug 10, 4:58 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Grady, Stephens | 47 min |
| Aug 10, 5:11 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher, Logan, Oklahoma | 49 min |
| Aug 10, 5:18 PM CDT | Severe Thunderstorm Warning | DDC | Barber, Comanche, Kiowa, Pratt | 21 min |
| Aug 10, 5:50 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Grady, McClain | 40 min |
| Aug 10, 6:31 PM CDT | Severe Thunderstorm Warning | OUN | Grady, McClain | 44 min |
| Aug 10, 7:01 PM CDT | Severe Thunderstorm Warning | ICT | Sumner | 30 min |
| Aug 10, 7:09 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 36 min |
| Aug 10, 7:10 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 50 min |
| Aug 10, 7:15 PM CDT | Severe Thunderstorm Warning | DDC | Barber, Comanche, Kiowa | 18 min |
| Aug 10, 7:23 PM CDT | Severe Thunderstorm Warning | OUN | McClain | 32 min |
| Aug 10, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Washington | 52 min |
| Aug 10, 7:46 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 29 min |
| Aug 10, 8:09 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 51 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
Norman, OK (KOUN), launched 12:00Z, 7.1 hours before the alert went out and 125 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
- 335 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1030 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 84 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 |
|---|---|---|---|---|
| Aug 9, 7:36 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper | 84 min |
| Aug 10, 1:42 PM CDT | Mesoscale Discussion | SPC | Harper, Sumner | 2 hr |
| Aug 10, 2:05 PM CDT | Mesoscale Discussion | SPC | Barton, Cloud, Ellis, Ellsworth, Gove, Graham and 15 more | 115 min |
| Aug 10, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Barton, Butler, Chase, Chautauqua, Clay and 38 more | 7 hr |
| Aug 10, 3:50 PM CDT | Mesoscale Discussion | SPC | Grant, Gray, Greeley, Hamilton, Haskell, Kearny and 5 more | 115 min |
| Aug 10, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | Finney, Grant, Gray, Greeley, Hamilton, Haskell and 7 more | 7 hr |
| Aug 10, 4:53 PM CDT | Mesoscale Discussion | SPC | Barton, Edwards, Ellsworth, Harvey, Kingman, Kiowa and 11 more | 97 min |
| Aug 10, 6:44 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche | 91 min |
| Aug 10, 4:33 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 19 more | 57 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2017Severe Thunderstorm Watches in Kansas, 2017Every severe thunderstorm watch in 2017
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.