Alert archive / Oklahoma / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 75
The Storm Prediction Center issued this severe thunderstorm watch at Apr 17, 2019, 1:32 PM CDT for 17 counties in Oklahoma; 15 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2019, 1:32 PM CDT (18:32 UTC)
- Expired
- Apr 17, 2019, 8:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 32 counties
Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 138 km from the middle of the area, began a volume at 18:35 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
- 10%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 1:55 PM CDT | Severe Thunderstorm Warning | AMA | Donley | 65 min |
| Apr 17, 2:15 PM CDT | Severe Thunderstorm Warning | AMA | Donley, Gray | 40 min |
| Apr 17, 2:36 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley, Gray, Wheeler | 69 min |
| Apr 17, 3:04 PM CDT | Severe Thunderstorm Warning | AMA | Wheeler | 71 min |
| Apr 17, 3:08 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Donley | 82 min |
| Apr 17, 3:18 PM CDT | Severe Thunderstorm Warning | AMA | Hemphill, Lipscomb | 72 min |
| Apr 17, 3:25 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Roger Mills | 50 min |
| Apr 17, 3:45 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Gray, Wheeler | 60 min |
| Apr 17, 3:46 PM CDT | Severe Thunderstorm Warning | AMA | Hansford, Hutchinson, Ochiltree, Roberts | 74 min |
| Apr 17, 3:54 PM CDT | Tornado Warning | AMA | Hemphill | 24 min |
| Apr 17, 4:06 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Roger Mills | 39 min |
| Apr 17, 4:11 PM CDT | Tornado Warning | AMA | Hemphill, Lipscomb | 49 min |
| Apr 17, 4:16 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley, Gray, Wheeler | 59 min |
| Apr 17, 4:39 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 51 min |
| Apr 17, 4:43 PM CDT | Severe Thunderstorm Warning | OUN | Ellis | 47 min |
| Apr 17, 4:49 PM CDT | Tornado Warning | OUN | Ellis | 41 min |
| Apr 17, 4:51 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb | 32 min |
| Apr 17, 5:05 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Potter, Randall | 55 min |
| Apr 17, 5:17 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Wheeler | 35 min |
| Apr 17, 5:20 PM CDT | Tornado Warning | AMA | Carson | 16 min |
| Apr 17, 5:21 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray, Roberts | 42 min |
| Apr 17, 5:24 PM CDT | Tornado Warning | OUN | Ellis | 36 min |
| Apr 17, 5:27 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey, Roger Mills | 48 min |
| Apr 17, 5:28 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Deaf Smith, Randall | 35 min |
| Apr 17, 5:31 PM CDT | Severe Thunderstorm Warning | OUN | Beckham | 44 min |
| Apr 17, 5:32 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 43 min |
| Apr 17, 5:34 PM CDT | Tornado Warning | OUN | Custer, Roger Mills | 16 min |
| Apr 17, 5:49 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 41 min |
| Apr 17, 5:49 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Donley, Gray | 39 min |
| Apr 17, 5:53 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Potter, Randall | 33 min |
| Apr 17, 6:07 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa | 38 min |
| Apr 17, 6:08 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey, Roger Mills | 52 min |
| Apr 17, 6:12 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Roger Mills | 48 min |
| Apr 17, 6:14 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 46 min |
| Apr 17, 6:52 PM CDT | Flash Flood Warning | OUN | Alfalfa, Harper, Woods, Woodward | 3 hr |
| Apr 17, 6:56 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey, Major, Woodward | 49 min |
| Apr 17, 7:01 PM CDT | Severe Thunderstorm Warning | OUN | Woods, Woodward | 33 min |
| Apr 17, 7:42 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey, Kingfisher, Major | 48 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, 6.5 hours before the alert went out and 137 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2860 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 1:13 PM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Roger Mills | 2 hr |
| Apr 17, 3:30 PM CDT | Mesoscale Discussion | SPC | Carter, Jefferson, Love, Marshall | 2 hr |
| Apr 17, 3:43 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Custer, Dewey, Ellis and 8 more | 2 hr |
| Apr 17, 4:27 PM CDT | Severe Thunderstorm Watch | SPC | Canadian, Cleveland, Craig, Garfield, Grady, Grant and 14 more | 8 hr |
| Apr 17, 5:50 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Custer, Dewey, Ellis, Greer and 9 more | 85 min |
| Apr 17, 5:54 PM CDT | Mesoscale Discussion | SPC | Jefferson, Love | 2 hr |
| Apr 17, 6:08 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Dewey, Garfield, Grant, Kay and 11 more | 97 min |
| Apr 17, 6:16 PM CDT | Severe Thunderstorm Watch | SPC | Bryan, Carter, Johnston, Love, Marshall | 9 hr |
| Apr 17, 6:59 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Brown, Burnet, Concho, Edwards and 17 more | 61 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2019Severe Thunderstorm Watches in Texas, 2019Every severe thunderstorm watch in 2019
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.