Alert archive / Texas / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 13, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 11, 2026, 12:09 PM CDT for 5 counties in Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 11, 2026, 12:09 PM CDT (17:09 UTC)
- Expired
- Mar 11, 2026, 12:42 PM CDT
- In force
- 33 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Grimes County, TX, Harris County, TX, Montgomery County, TX, Walker County, TX, Waller County, TX
The radar
The Houston radar (KHGX), 108 km from the middle of the area, began a volume at 17:13 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 11, 11:25 AM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 5.2 hours before the alert went out and 321 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
- 3 J/kg
- Mixed-layer CIN
- -407 J/kg
- Mixed-layer LCL
- 2141 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 4:45 AM CDT | Special Weather Statement | HGX | San Jacinto | 30 min |
| Mar 11, 5:16 AM CDT | Special Weather Statement | HGX | Polk, San Jacinto | 29 min |
| Mar 11, 6:07 AM CDT | Special Weather Statement | HGX | Polk | 23 min |
| Mar 11, 6:41 AM CDT | Special Weather Statement | HGX | Brazos | 34 min |
| Mar 11, 7:11 AM CDT | Special Weather Statement | HGX | Madison | 34 min |
| Mar 11, 7:14 AM CDT | Small Craft Advisory | HGX | 33 hr | |
| Mar 11, 7:46 AM CDT | Special Weather Statement | HGX | Trinity | 44 min |
| Mar 11, 8:10 AM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity, Walker | 23 min |
| Mar 11, 8:31 AM CDT | Special Weather Statement | HGX | Burleson | 29 min |
| Mar 11, 8:55 AM CDT | Special Weather Statement | HGX | Brazos, Burleson | 35 min |
| Mar 11, 9:34 AM CDT | Special Weather Statement | HGX | Brazos, Madison | 41 min |
| Mar 11, 10:37 AM CDT | Special Weather Statement | HGX | Washington | 23 min |
| Mar 11, 10:39 AM CDT | Special Weather Statement | HGX | Austin | 36 min |
| Mar 11, 11:27 AM CDT | Rip Current Statement | HGX | Brazoria, Galveston, Matagorda | 8 hr |
| Mar 11, 11:35 AM CDT | Special Weather Statement | HGX | Waller | 40 min |
| Mar 11, 11:49 AM CDT | Severe Thunderstorm Warning | HGX | Austin, Fort Bend, Harris, Montgomery, Waller | 56 min |
| Mar 11, 12:30 PM CDT | Special Weather Statement | HGX | Austin | 30 min |
| Mar 11, 12:35 PM CDT | Special Weather Statement | HGX | San Jacinto, Walker | 40 min |
| Mar 11, 12:40 PM CDT | Special Weather Statement | HGX | Montgomery, San Jacinto | 35 min |
| Mar 11, 1:12 PM CDT | Special Weather Statement | HGX | Polk, San Jacinto, Trinity | 63 min |
| Mar 11, 1:15 PM CDT | Special Weather Statement | HGX | Fort Bend, Harris, Liberty | 60 min |
| Mar 11, 1:22 PM CDT | Gale Warning | HGX | 21 hr | |
| Mar 11, 1:22 PM CDT | Small Craft Advisory | HGX | 27 hr | |
| Mar 11, 2:15 PM CDT | Special Weather Statement | HGX | Liberty | 30 min |
| Mar 11, 5:34 PM CDT | Special Weather Statement | HGX | Austin, Colorado | 56 min |
| Mar 11, 5:51 PM CDT | Special Weather Statement | HGX | Fort Bend | 39 min |
| Mar 11, 6:29 PM CDT | Special Weather Statement | HGX | Colorado, Wharton | 46 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2026Every severe thunderstorm warning in 2026
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.