Alert archive / Texas / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 97
The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2020, 2:47 PM CDT for 9 parishes in Louisiana; 75 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2020, 2:47 PM CDT (19:47 UTC)
- Expired
- Apr 9, 2020, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 84 counties
Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Anderson County, TX, Angelina County, TX, Atascosa County, TX, Austin County, TX, Bandera County, TX, Bastrop County, TX, Bee County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hardin County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Jim Wells County, TX, Karnes County, TX, Kendall County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Live Oak County, TX, Madison County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Robertson 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, Uvalde County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Webb County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Ft Hood radar (KGRK), 127 km from the middle of the area, began a volume at 19:50 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
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
35 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:48 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Hays, Travis | 42 min |
| Apr 9, 2:54 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 36 min |
| Apr 9, 2:59 PM CDT | Severe Thunderstorm Warning | CRP | Webb | 31 min |
| Apr 9, 3:03 PM CDT | Severe Thunderstorm Warning | FWD | Bell, Milam | 57 min |
| Apr 9, 3:27 PM CDT | Severe Thunderstorm Warning | CRP | Webb | 18 min |
| Apr 9, 3:28 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Lee, Williamson | 62 min |
| Apr 9, 3:33 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 42 min |
| Apr 9, 3:43 PM CDT | Severe Thunderstorm Warning | CRP | Webb | 34 min |
| Apr 9, 3:48 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 27 min |
| Apr 9, 4:15 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Washington | 45 min |
| Apr 9, 5:00 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazos, Grimes, Madison, Montgomery, San Jacinto and 3 more | 45 min |
| Apr 9, 5:24 PM CDT | Severe Thunderstorm Warning | LCH | Vernon | 51 min |
| Apr 9, 5:26 PM CDT | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 49 min |
| Apr 9, 5:28 PM CDT | Severe Thunderstorm Warning | SHV | Sabine, San Augustine, Shelby | 21 min |
| Apr 9, 5:29 PM CDT | Severe Thunderstorm Warning | LCH | Jasper, Newton | 46 min |
| Apr 9, 5:46 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 44 min |
| Apr 9, 5:46 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 44 min |
| Apr 9, 5:47 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Liberty, Montgomery, Polk, San Jacinto, Trinity and 1 more | 43 min |
| Apr 9, 6:00 PM CDT | Severe Thunderstorm Warning | EWX | Frio, Medina | 30 min |
| Apr 9, 6:13 PM CDT | Severe Thunderstorm Warning | LCH | Vernon | 32 min |
| Apr 9, 6:21 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Evangeline, Rapides, Vernon | 24 min |
| Apr 9, 6:23 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris, Liberty, Montgomery | 37 min |
| Apr 9, 6:33 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, Webb | 42 min |
| Apr 9, 6:45 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Rapides, Vernon | 30 min |
| Apr 9, 7:10 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Evangeline | 35 min |
| Apr 9, 7:16 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, Webb | 44 min |
| Apr 9, 7:22 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Frio, Zavala | 53 min |
| Apr 9, 7:34 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Karnes, Wilson | 56 min |
| Apr 9, 7:35 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Beauregard, Calcasieu, Jefferson Davis | 55 min |
| Apr 9, 7:50 PM CDT | Severe Thunderstorm Warning | CRP | Duval, La Salle, McMullen, Webb | 40 min |
| Apr 9, 8:00 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, Webb | 30 min |
| Apr 9, 8:24 PM CDT | Severe Thunderstorm Warning | CRP | Bee, Goliad | 51 min |
| Apr 9, 8:26 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, McMullen, Webb | 49 min |
| Apr 9, 8:30 PM CDT | Severe Thunderstorm Warning | EWX | Karnes | 30 min |
| Apr 9, 8:57 PM CDT | Severe Thunderstorm Warning | CRP | Duval, La Salle, Live Oak, McMullen, Webb | 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.8 hours before the alert went out and 285 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
- 1181 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 1103 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 5:20 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 7 more | 115 min |
| Apr 9, 12:13 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bell, Blanco, Burnet, Caldwell and 19 more | 2 hr |
| Apr 9, 5:40 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 7 more | 2 hr |
| Apr 9, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Brooks, Hidalgo, Jim Hogg, Starr, Zapata | 4 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2020Severe Thunderstorm Watches in Louisiana, 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.