Alert archive / Texas / Tornado Watches in 2020
Tornado Watch 133
The Storm Prediction Center issued this tornado watch at Apr 22, 2020, 10:55 AM CDT for 10 parishes in Louisiana; 37 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2020, 10:55 AM CDT (15:55 UTC)
- Expired
- Apr 22, 2020, 5:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 47 counties
Allen Parish, LA, Beauregard Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Cherokee County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Grimes County, TX, Houston County, TX, Jasper County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 173 km from the middle of the area, began a volume at 15:57 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
- 30%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 11:47 AM CDT | Severe Thunderstorm Warning | FWD | Anderson, Freestone | 26 min |
| Apr 22, 12:01 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Grant, Jackson, Natchitoches, Red River, Winn | 29 min |
| Apr 22, 12:34 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Sabine, Winn | 41 min |
| Apr 22, 1:55 PM CDT | Severe Thunderstorm Warning | FWD | Anderson, Freestone, Leon | 66 min |
| Apr 22, 2:14 PM CDT | Tornado Warning | FWD | Anderson, Leon | 46 min |
| Apr 22, 2:19 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 26 min |
| Apr 22, 2:20 PM CDT | Severe Thunderstorm Warning | LCH | Vernon | 25 min |
| Apr 22, 2:25 PM CDT | Tornado Warning | HGX | Houston | 20 min |
| Apr 22, 2:30 PM CDT | Tornado Warning | SHV | Cherokee, Panola, Rusk, Smith | 45 min |
| Apr 22, 2:31 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 44 min |
| Apr 22, 2:34 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Sabine | 41 min |
| Apr 22, 2:37 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Rusk | 53 min |
| Apr 22, 2:45 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 30 min |
| Apr 22, 2:48 PM CDT | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 42 min |
| Apr 22, 3:04 PM CDT | Tornado Warning | SHV | Angelina, Cherokee, Nacogdoches | 41 min |
| Apr 22, 3:05 PM CDT | Tornado Warning | HGX | Houston | 10 min |
| Apr 22, 3:13 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 62 min |
| Apr 22, 3:18 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Madison | 42 min |
| Apr 22, 3:28 PM CDT | Flash Flood Warning | SHV | Angelina, Cherokee, Nacogdoches | 3 hr |
| Apr 22, 3:43 PM CDT | Severe Thunderstorm Warning | FWD | Leon | 34 min |
| Apr 22, 3:43 PM CDT | Tornado Warning | SHV | Angelina, Nacogdoches, San Augustine, Shelby | 47 min |
| Apr 22, 3:55 PM CDT | Severe Thunderstorm Warning | SHV | Grant, LaSalle, Natchitoches, Winn | 50 min |
| Apr 22, 3:58 PM CDT | Severe Thunderstorm Warning | LCH | Rapides | 32 min |
| Apr 22, 3:58 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison, Walker | 47 min |
| Apr 22, 4:27 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 48 min |
| Apr 22, 4:33 PM CDT | Severe Thunderstorm Warning | HGX | Trinity, Walker | 11 min |
| Apr 22, 4:37 PM CDT | Tornado Warning | HGX | Grimes, Houston, Madison, Walker | 23 min |
| Apr 22, 4:43 PM CDT | Flash Flood Warning | SHV | De Soto | 3 hr |
| Apr 22, 4:45 PM CDT | Flash Flood Warning | SHV | De Soto, Sabine | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 3.9 hours before the alert went out and 231 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
- 24 J/kg
- Mixed-layer CIN
- -457 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 379 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 10:38 AM CDT | Mesoscale Discussion | SPC | Caddo, De Soto, Natchitoches, Red River, Sabine, Vernon | 2 hr |
| Apr 22, 1:10 PM CDT | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, De Soto, Evangeline, Grant and 6 more | 65 min |
| Apr 22, 2:53 PM CDT | Mesoscale Discussion | SPC | Bienville, De Soto, Grant, LaSalle, Natchitoches, Rapides and 4 more | 67 min |
| Apr 22, 4:24 PM CDT | Mesoscale Discussion | SPC | Allen, Avoyelles, Beauregard, Bienville, Caldwell, Catahoula and 16 more | 96 min |
| Apr 22, 5:01 PM CDT | Tornado Watch | SPC | Allen, Avoyelles, Beauregard, Bienville, Bossier, Caddo and 17 more | 9 hr |
| Apr 22, 6:47 PM CDT | Mesoscale Discussion | SPC | Concordia, Saint Helena, Tensas, Washington | 88 min |
| Apr 21, 8:12 PM CDT | Mesoscale Discussion | SPC | Hemphill, Lipscomb, Wheeler | 63 min |
| Apr 22, 1:21 AM CDT | Mesoscale Discussion | SPC | Fannin, Lamar, Red River | 84 min |
| Apr 22, 1:46 AM CDT | Severe Thunderstorm Watch | SPC | Fannin, Lamar, Red River | 4 hr |
| Apr 22, 2:16 AM CDT | Mesoscale Discussion | SPC | Carson, Dallam, Hansford, Hartley, Hemphill, Hutchinson and 7 more | 119 min |
| Apr 22, 1:12 PM CDT | Mesoscale Discussion | SPC | Clay, Collin, Cooke, Dallas, Delta, Denton and 15 more | 63 min |
| Apr 22, 2:33 PM CDT | Tornado Watch | SPC | Collin, Cooke, Dallas, Delta, Denton, Fannin and 12 more | 6 hr |
| Apr 22, 4:43 PM CDT | Mesoscale Discussion | SPC | Grayson | 62 min |
| Apr 22, 4:47 PM CDT | Mesoscale Discussion | SPC | Angelina, Polk, San Augustine, San Jacinto, Trinity, Tyler and 1 more | 88 min |
| Apr 22, 5:38 PM CDT | Mesoscale Discussion | SPC | Camp, Collin, Dallas, Delta, Fannin, Franklin and 10 more | 97 min |
| Apr 22, 5:53 PM CDT | Mesoscale Discussion | SPC | Angelina, Polk, Trinity, Tyler | 37 min |
| Apr 22, 6:39 PM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Marion, Morris, Red River and 2 more | 66 min |
Nearby
Tornado Watches in Texas, 2020Tornado Watches in Louisiana, 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.