Alert archive / Texas / Tornado Watches in 2024
Tornado Watch 18
The Storm Prediction Center issued this tornado watch at Feb 11, 2024, 8:59 AM CST for 15 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 11, 2024, 8:59 AM CST (14:59 UTC)
- Expired
- Feb 11, 2024, 3:54 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Austin County, TX, Colorado County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 114 km from the middle of the area, began a volume at 15:00 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
- 40%
- 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
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 9:10 AM CST | Tornado Warning | HGX | Grimes, Montgomery, Walker | 35 min |
| Feb 11, 9:26 AM CST | Tornado Warning | HGX | Austin, Waller, Washington | 34 min |
| Feb 11, 9:29 AM CST | Severe Thunderstorm Warning | HGX | Grimes, Montgomery, Walker | 31 min |
| Feb 11, 9:40 AM CST | Tornado Warning | HGX | San Jacinto, Walker | 35 min |
| Feb 11, 9:41 AM CST | Tornado Warning | HGX | Grimes, Montgomery, Walker | 34 min |
| Feb 11, 9:50 AM CST | Tornado Warning | HGX | Grimes, Montgomery, Walker | 25 min |
| Feb 11, 10:03 AM CST | Tornado Warning | HGX | Polk, San Jacinto, Trinity, Walker | 27 min |
| Feb 11, 10:12 AM CST | Severe Thunderstorm Warning | HGX | Montgomery, San Jacinto, Walker | 33 min |
| Feb 11, 10:26 AM CST | Tornado Warning | HGX | Polk, San Jacinto, Trinity | 34 min |
| Feb 11, 10:50 AM CST | Tornado Warning | HGX | Polk | 25 min |
| Feb 11, 10:57 AM CST | Tornado Warning | LCH | Tyler | 33 min |
| Feb 11, 11:14 AM CST | Tornado Warning | HGX | Polk | 16 min |
| Feb 11, 11:25 AM CST | Tornado Warning | LCH | Tyler | 8 min |
| Feb 11, 11:57 AM CST | Severe Thunderstorm Warning | HGX | Liberty, Polk, San Jacinto | 33 min |
| Feb 11, 12:27 PM CST | Severe Thunderstorm Warning | HGX | Polk | 22 min |
| Feb 11, 12:41 PM CST | Severe Thunderstorm Warning | LCH | Tyler | 20 min |
| Feb 11, 12:48 PM CST | Severe Thunderstorm Warning | HGX | Liberty, Polk | 27 min |
| Feb 11, 1:06 PM CST | Severe Thunderstorm Warning | LCH | Hardin, Tyler | 24 min |
| Feb 11, 1:12 PM CST | Severe Thunderstorm Warning | HGX | Liberty, Polk | 21 min |
| Feb 11, 1:28 PM CST | Severe Thunderstorm Warning | LCH | Hardin, Tyler | 32 min |
| Feb 11, 1:31 PM CST | Severe Thunderstorm Warning | LCH | Newton | 29 min |
| Feb 11, 1:52 PM CST | Tornado Warning | LCH | Jasper, Tyler | 27 min |
| Feb 11, 2:30 PM CST | Severe Thunderstorm Warning | LCH | Jasper, Newton | 30 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, 3.0 hours before the alert went out and 215 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
- 680 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 10, 8:40 PM CST | Mesoscale Discussion | SPC | Bandera, Blanco, Brown, Coke, Coleman, Concho and 24 more | 95 min |
| Feb 10, 9:53 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Brown, Callahan, Coke, Coleman, Comanche and 32 more | 6 hr |
| Feb 10, 11:56 PM CST | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Concho, Crockett and 15 more | 94 min |
| Feb 11, 1:26 AM CST | Mesoscale Discussion | SPC | Bell, Bosque, Burnet, Comanche, Coryell, Erath and 13 more | 2 hr |
| Feb 11, 2:35 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Bell, Blanco, Bosque, Brazos and 36 more | 8 hr |
| Feb 11, 3:20 AM CST | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Burnet, Coryell, Ellis and 16 more | 115 min |
| Feb 11, 6:40 AM CST | Mesoscale Discussion | SPC | Anderson, Brazos, Cass, Cherokee, Freestone, Gregg and 15 more | 3 hr |
| Feb 11, 7:52 AM CST | Severe Thunderstorm Watch | SPC | Sabine, San Augustine | 5 hr |
| Feb 11, 8:42 AM CST | Mesoscale Discussion | SPC | Austin, Grimes, Hardin, Harris, Liberty, Montgomery and 5 more | 93 min |
| Feb 11, 9:20 AM CST | Mesoscale Discussion | SPC | Nacogdoches, Panola, San Augustine, Shelby | 85 min |
| Feb 11, 10:56 AM CST | Mesoscale Discussion | SPC | Bailey, Briscoe, Castro, Childress, Cottle, Crosby and 12 more | 4 hr |
| Feb 11, 11:24 AM CST | Mesoscale Discussion | SPC | Hardin, Jasper, Newton, Polk, San Jacinto, Tyler | 96 min |
Nearby
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.