Alert archive / Oklahoma / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 293
The Storm Prediction Center issued this severe thunderstorm watch at Jun 21, 2020, 5:50 PM CDT for 46 counties in Oklahoma; 6 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 21, 2020, 5:50 PM CDT (22:50 UTC)
- Expired
- Jun 22, 2020, 3:00 AM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 52 counties
Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay 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, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Texas County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Hansford County, TX, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Vance AFB radar (KVNX), 158 km from the middle of the area, began a volume at 22:51 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
- 5%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 70%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
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 |
|---|---|---|---|---|
| Jun 21, 6:48 PM CDT | Severe Thunderstorm Warning | AMA | Beaver | 57 min |
| Jun 21, 7:20 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods | 55 min |
| Jun 21, 7:44 PM CDT | Severe Thunderstorm Warning | AMA | Beaver | 46 min |
| Jun 21, 8:02 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woods, Woodward | 58 min |
| Jun 21, 8:06 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant, Woods | 54 min |
| Jun 21, 8:25 PM CDT | Severe Thunderstorm Warning | AMA | Beaver | 65 min |
| Jun 21, 8:40 PM CDT | Tornado Warning | OUN | Major, Woods, Woodward | 20 min |
| Jun 21, 8:46 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Blaine, Dewey, Ellis, Major, Woods and 1 more | 59 min |
| Jun 21, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | Ellis | 46 min |
| Jun 21, 9:09 PM CDT | Tornado Warning | AMA | Lipscomb | 36 min |
| Jun 21, 9:24 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb, Ochiltree | 30 min |
| Jun 21, 9:29 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills, Woodward | 46 min |
| Jun 21, 9:34 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Blaine, Dewey, Garfield, Grant, Kingfisher and 2 more | 56 min |
| Jun 21, 9:36 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb | 24 min |
| Jun 21, 9:55 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Ellis, Roger Mills | 50 min |
| Jun 21, 10:09 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills | 66 min |
| Jun 21, 10:14 PM CDT | Severe Thunderstorm Warning | AMA | Gray, Hemphill, Roberts, Wheeler | 61 min |
| Jun 21, 10:24 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan | 51 min |
| Jun 21, 10:27 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey, Washita | 48 min |
| Jun 21, 10:53 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Caddo, Custer, Kiowa, Washita | 52 min |
| Jun 21, 11:04 PM CDT | Severe Thunderstorm Warning | AMA | Gray, Hemphill, Roberts, Wheeler | 56 min |
| Jun 21, 11:23 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian, Cleveland, Grady, McClain, Oklahoma | 53 min |
| Jun 21, 11:33 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Grady, Jackson, Kiowa, Stephens and 2 more | 42 min |
| Jun 21, 11:52 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Roger Mills | 53 min |
| Jun 21, 11:58 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Garvin, Grady, McClain, Stephens | 62 min |
| Jun 22, 12:13 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Cotton, Grady, Jefferson, Kiowa and 2 more | 47 min |
| Jun 22, 12:45 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Cleveland, Garvin, Grady, Jefferson, McClain and 4 more | 45 min |
| Jun 22, 12:57 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Jefferson, Stephens, Tillman | 48 min |
| Jun 22, 1:06 AM CDT | Flash Flood Warning | OUN | Comanche | 3 hr |
| Jun 22, 1:23 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Johnston, Love, Marshall, Murray | 52 min |
| Jun 22, 1:41 AM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 49 min |
| Jun 22, 2:21 AM CDT | Severe Thunderstorm Warning | OUN | Beckham, Custer, Roger Mills, Washita | 39 min |
| Jun 22, 2:28 AM CDT | Severe Thunderstorm Warning | AMA | Hemphill, Wheeler | 33 min |
| Jun 22, 2:59 AM CDT | Severe Thunderstorm Warning | OUN | Beckham, Roger Mills, Washita | 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
Dodge City, (KDDC), launched 12:00Z, 10.8 hours before the alert went out and 165 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
- 2453 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1029 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 11:13 PM CDT | Mesoscale Discussion | SPC | Harper | 92 min |
| Jun 21, 1:01 AM CDT | Mesoscale Discussion | SPC | Carter, Cotton, Jefferson, Love, Marshall, Stephens and 1 more | 119 min |
| Jun 21, 1:21 AM CDT | Severe Thunderstorm Watch | SPC | Bryan, Carter, Cotton, Jefferson, Johnston, Love and 3 more | 6 hr |
| Jun 21, 6:56 AM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw | 2 hr |
| Jun 21, 3:04 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Dewey, Ellis, Harmon, Harper and 4 more | 116 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2020Severe Thunderstorm Watches in Texas, 2020Every severe thunderstorm watch in 2020
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.