Alert archive / Oklahoma / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 360
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2020, 6:08 PM CDT for 12 counties in Kansas; 49 counties in Oklahoma. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2020, 6:08 PM CDT (23:08 UTC)
- Expired
- Jul 12, 2020, 1:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
All 61 counties
Barber County, KS, Butler County, KS, Chautauqua County, KS, Comanche County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Kingman County, KS, Montgomery County, KS, Sedgwick County, KS, Sumner County, KS, Adair County, OK, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Delaware County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Harper County, OK, Haskell County, OK, Kay County, OK, Kingfisher County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pottawatomie County, OK, Pushmataha County, OK, Roger Mills County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Washita County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 23:10 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
- 90%
- One or more gusts of 65 knots or more
- 80%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 80%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
85 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 6:13 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua, Elk, Greenwood, Montgomery, Wilson, Woodson | 62 min |
| Jul 11, 6:15 PM CDT | Severe Thunderstorm Warning | ICT | Labette, Montgomery, Neosho | 60 min |
| Jul 11, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Major | 34 min |
| Jul 11, 6:34 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 26 min |
| Jul 11, 6:39 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woodward | 36 min |
| Jul 11, 6:48 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Major | 27 min |
| Jul 11, 6:53 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Major, Woods | 37 min |
| Jul 11, 6:53 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Major | 37 min |
| Jul 11, 6:55 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woods, Woodward | 35 min |
| Jul 11, 6:57 PM CDT | Severe Thunderstorm Warning | TSA | Delaware, Ottawa | 48 min |
| Jul 11, 6:59 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 31 min |
| Jul 11, 7:09 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Logan, Noble | 36 min |
| Jul 11, 7:17 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua, Elk, Labette, Montgomery, Wilson | 58 min |
| Jul 11, 7:22 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woodward | 38 min |
| Jul 11, 7:27 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Major, Woods | 48 min |
| Jul 11, 7:29 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan, Major | 31 min |
| Jul 11, 7:29 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woods, Woodward | 46 min |
| Jul 11, 7:34 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Washington | 41 min |
| Jul 11, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Delaware, Ottawa, Rogers | 52 min |
| Jul 11, 7:43 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Logan, Noble, Payne | 32 min |
| Jul 11, 7:44 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 46 min |
| Jul 11, 7:55 PM CDT | Severe Thunderstorm Warning | TSA | Delaware, Mayes | 50 min |
| Jul 11, 7:59 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woodward | 31 min |
| Jul 11, 8:00 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Washington | 30 min |
| Jul 11, 8:06 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 39 min |
| Jul 11, 8:08 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Noble, Payne | 52 min |
| Jul 11, 8:11 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woods, Woodward | 49 min |
| Jul 11, 8:12 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua, Montgomery | 32 min |
| Jul 11, 8:12 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 48 min |
| Jul 11, 8:13 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Garfield, Kingfisher, Major | 20 min |
| Jul 11, 8:21 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Delaware, Mayes, Rogers, Wagoner | 24 min |
| Jul 11, 8:24 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 51 min |
| Jul 11, 8:27 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 33 min |
| Jul 11, 8:29 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 46 min |
| Jul 11, 8:31 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 44 min |
| Jul 11, 8:36 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 24 min |
| Jul 11, 8:36 PM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa, Wagoner | 39 min |
| Jul 11, 8:41 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Major, Woods | 49 min |
| Jul 11, 8:44 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 46 min |
| Jul 11, 8:46 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Delaware, Mayes, Rogers, Wagoner | 44 min |
| Jul 11, 8:49 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 26 min |
| Jul 11, 8:51 PM CDT | Severe Thunderstorm Warning | OUN | Kay, Noble | 24 min |
| Jul 11, 8:55 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 35 min |
| Jul 11, 8:57 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 48 min |
| Jul 11, 9:00 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 45 min |
| Jul 11, 9:10 PM CDT | Severe Thunderstorm Warning | OUN | Noble | 50 min |
| Jul 11, 9:10 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Muskogee, Wagoner | 35 min |
| Jul 11, 9:13 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant | 32 min |
| Jul 11, 9:13 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Muskogee, Okmulgee, Osage, Rogers, Tulsa and 1 more | 47 min |
| Jul 11, 9:15 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant | 30 min |
| Jul 11, 9:15 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee, Tulsa | 45 min |
| Jul 11, 9:18 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 12 min |
| Jul 11, 9:25 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Noble | 50 min |
| Jul 11, 9:27 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Muskogee, Sequoyah | 48 min |
| Jul 11, 9:29 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods | 46 min |
| Jul 11, 9:34 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Mayes, Rogers, Wagoner | 26 min |
| Jul 11, 9:38 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods | 67 min |
| Jul 11, 9:43 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant | 48 min |
| Jul 11, 9:50 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee, Tulsa | 40 min |
| Jul 11, 9:51 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 53 min |
| Jul 11, 9:54 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 51 min |
| Jul 11, 10:00 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee, Tulsa, Wagoner | 30 min |
| Jul 11, 10:01 PM CDT | Severe Thunderstorm Warning | OUN | Noble | 59 min |
| Jul 11, 10:02 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Tulsa, Washington | 28 min |
| Jul 11, 10:05 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 40 min |
| Jul 11, 10:07 PM CDT | Flash Flood Warning | TSA | Tulsa | 3 hr |
| Jul 11, 10:10 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 65 min |
| Jul 11, 10:19 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, McIntosh, Muskogee, Okmulgee, Pittsburg | 41 min |
| Jul 11, 10:20 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 40 min |
| Jul 11, 10:24 PM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa, Wagoner, Washington | 19 min |
| Jul 11, 10:29 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, LeFlore | 46 min |
| Jul 11, 10:32 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 43 min |
| Jul 11, 10:48 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee, Okmulgee | 42 min |
| Jul 11, 10:53 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 52 min |
| Jul 11, 11:00 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, McIntosh, Muskogee, Okmulgee, Pittsburg and 1 more | 45 min |
| Jul 11, 11:14 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Grady, Kingfisher | 31 min |
| Jul 11, 11:17 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore | 28 min |
| Jul 11, 11:33 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 57 min |
| Jul 11, 11:40 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee, Okmulgee | 50 min |
| Jul 11, 11:44 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Latimer, LeFlore, Pittsburg, Pushmataha | 46 min |
| Jul 11, 11:50 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Grady, McClain | 25 min |
| Jul 12, 12:06 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Garvin, Grady, McClain, Murray, Oklahoma and 3 more | 39 min |
| Jul 12, 12:15 AM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 45 min |
| Jul 12, 12:37 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Carter, Comanche, Cotton, Garvin, Grady and 2 more | 38 min |
| Jul 12, 12:41 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Cleveland, Coal, Garvin, Hughes, Johnston and 5 more | 49 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, 11.1 hours before the alert went out and 153 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
- 1751 J/kg
- Mixed-layer CIN
- -247 J/kg
- Mixed-layer LCL
- 1318 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:00 PM CDT | Mesoscale Discussion | SPC | Cloud, Jewell, Mitchell, Osborne, Phillips, Republic and 1 more | 60 min |
| Jul 11, 1:23 AM CDT | Mesoscale Discussion | SPC | Brown, Jewell, Marshall, Nemaha, Phillips, Republic and 2 more | 2 hr |
| Jul 11, 7:38 AM CDT | Mesoscale Discussion | SPC | Butler, Chase, Chautauqua, Cowley, Elk, Greenwood and 1 more | 97 min |
| Jul 11, 12:43 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Clay and 22 more | 92 min |
| Jul 11, 1:35 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Atchison, Coffey, Dickinson, Douglas, Franklin and 17 more | 4 hr |
| Jul 11, 3:07 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 8 more | 83 min |
| Jul 11, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Neosho and 2 more | 7 hr |
| Jul 11, 4:00 PM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chase, Chautauqua, Clark, Comanche and 24 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2020Severe Thunderstorm Watches in Kansas, 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.