Alert archive / Texas / Tornado Watches in 2020
Tornado Watch 100
The Storm Prediction Center issued this tornado watch at Apr 11, 2020, 2:02 PM CDT for 7 counties in Oklahoma; 43 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2020, 2:02 PM CDT (19:02 UTC)
- Expired
- Apr 11, 2020, 10:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 50 counties
Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Borden County, TX, Briscoe County, TX, Callahan County, TX, Childress County, TX, Clay County, TX, Coke County, TX, Collingsworth County, TX, Cottle County, TX, Crockett County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Dyess AFB radar (KDYX), 131 km from the middle of the area, began a volume at 19:05 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
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- 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
- 90%
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 |
|---|---|---|---|---|
| Apr 11, 2:38 PM CDT | Severe Thunderstorm Warning | LUB | Kent, Stonewall | 37 min |
| Apr 11, 2:41 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Stephens | 49 min |
| Apr 11, 3:14 PM CDT | Severe Thunderstorm Warning | LUB | King, Stonewall | 31 min |
| Apr 11, 3:30 PM CDT | Severe Thunderstorm Warning | SJT | Haskell | 60 min |
| Apr 11, 4:07 PM CDT | Tornado Warning | SJT | Haskell | 38 min |
| Apr 11, 4:12 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe | 12 min |
| Apr 11, 4:32 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones | 58 min |
| Apr 11, 4:38 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 52 min |
| Apr 11, 4:51 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth | 39 min |
| Apr 11, 5:21 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth | 54 min |
| Apr 11, 5:21 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford | 54 min |
| Apr 11, 5:24 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Hall | 66 min |
| Apr 11, 5:32 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 43 min |
| Apr 11, 5:36 PM CDT | Severe Thunderstorm Warning | LUB | Crosby, Dickens, Motley | 54 min |
| Apr 11, 5:54 PM CDT | Severe Thunderstorm Warning | LUB | Cottle, Hall, Motley | 66 min |
| Apr 11, 5:54 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Shackelford | 66 min |
| Apr 11, 5:55 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon | 50 min |
| Apr 11, 6:06 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Runnels, Tom Green | 39 min |
| Apr 11, 6:11 PM CDT | Tornado Warning | OUN | Harmon | 14 min |
| Apr 11, 6:17 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson | 43 min |
| Apr 11, 6:18 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 57 min |
| Apr 11, 6:21 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Cottle | 39 min |
| Apr 11, 6:27 PM CDT | Severe Thunderstorm Warning | LUB | Cottle, Dickens, King, Motley | 63 min |
| Apr 11, 6:29 PM CDT | Tornado Warning | SJT | Shackelford | 31 min |
| Apr 11, 6:46 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 44 min |
| Apr 11, 6:49 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson | 41 min |
| Apr 11, 6:49 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Shackelford | 56 min |
| Apr 11, 7:08 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 52 min |
| Apr 11, 7:10 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 35 min |
| Apr 11, 7:28 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Jackson, Kiowa, Tillman | 62 min |
| Apr 11, 7:38 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford | 37 min |
| Apr 11, 7:52 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Tom Green | 36 min |
| Apr 11, 8:22 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Cotton, Jackson, Kiowa, Tillman | 53 min |
| Apr 11, 9:14 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Grady, Jefferson, Stephens | 61 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
Midland Regional, TX (KMAF), launched 12:00Z, 7.0 hours before the alert went out and 162 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
- 1161 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 642 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 10:10 AM CDT | Mesoscale Discussion | SPC | Love | 2 hr |
| Apr 11, 3:29 PM CDT | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Garvin, Grady, Greer and 8 more | 61 min |
| Apr 11, 3:43 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Garfield, Grant, Kay, Kingfisher and 5 more | 2 hr |
| Apr 11, 5:37 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Greer, Harmon, Jackson, Jefferson and 4 more | 113 min |
| Apr 11, 12:47 PM CDT | Mesoscale Discussion | SPC | Borden, Cottle, Crosby, Dawson, Dickens, Fisher and 18 more | 118 min |
| Apr 11, 5:35 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Bell, Brazos, Burleson, Falls and 14 more | 115 min |
Nearby
Tornado Watches in Texas, 2020Tornado Watches in Oklahoma, 2020Every tornado 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.