Alert archive / Texas / Red Flag Warnings in 2025
Red Flag Warning 1, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this red flag warning at Mar 4, 2025, 4:35 AM CST for 17 counties in Texas. It took effect at Mar 4, 2025, 10:00 AM CST. It was in force for 9 hr. 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 4, 2025, 4:35 AM CST (10:35 UTC)
- In effect from
- Mar 4, 2025, 10:00 AM CST
- Expired
- Mar 4, 2025, 7:00 PM CST
- In force
- 9 hr
- Issued by
- NWS Houston/Galveston, TX
Counties Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Jackson County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 98 km from the middle of the area, began a volume at 10:38 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 nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 10.6 hours before the alert went out and 350 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
- 472 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 373 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 3.1
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before this red flag warning went out at Mar 4, 4:31 AM CST, 4 minutes earlier.
Area forecast discussion, Mar 4, 4:31 AM CST, 4 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 3:46 AM CST | Gale Warning | HGX | 16 hr | |
| Mar 4, 3:46 AM CST | Small Craft Advisory | HGX | 32 hr | |
| Mar 4, 7:12 AM CST | Special Weather Statement | HGX | Brazos, Burleson, Washington | 33 min |
| Mar 4, 7:44 AM CST | Special Weather Statement | HGX | Austin, Brazos, Burleson, Grimes, Houston, Madison and 3 more | 46 min |
| Mar 4, 7:58 AM CST | Special Weather Statement | HGX | Montgomery, Polk, San Jacinto, Waller | 77 min |
| Mar 4, 8:26 AM CST | Severe Thunderstorm Warning | HGX | Houston, Madison, Polk, San Jacinto, Trinity, Walker | 49 min |
| Mar 4, 8:51 AM CST | Severe Thunderstorm Warning | HGX | Harris, Liberty, Montgomery, Polk, San Jacinto, Trinity | 54 min |
| Mar 4, 9:39 AM CST | Severe Thunderstorm Warning | HGX | Harris, Liberty, Montgomery, Polk, San Jacinto | 30 min |
| Mar 4, 9:43 AM CST | Special Marine Warning | HGX | 92 min | |
| Mar 4, 10:00 AM CST | Special Weather Statement | HGX | Brazoria, Chambers, Fort Bend, Galveston, Harris | 75 min |
| Mar 4, 4:51 PM CST | Special Weather Statement | HGX | Austin, Brazos, Burleson, Grimes, Houston, Madison and 7 more | 84 min |
Nearby
Red Flag Warnings in Texas, 2025Every red flag warning in 2025
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.