Alert archive / Texas / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 85, NWS Brownsville, TX

September 6, 2025Starr County, Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Sep 6, 2025, 9:54 PM CDT for Starr County, Zapata County, Texas. It was in force for 21 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
Sep 6, 2025, 9:54 PM CDT (02:54 UTC)
Expired
Sep 6, 2025, 10:15 PM CDT
In force
21 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Starr County, TX, Zapata County, TX

The radar

The Brownsville radar (KBRO), 181 km from the middle of the area, began a volume at 02:57 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.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.9 hours before the alert went out and 342 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.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2025-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 301 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2025-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
301 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
1434 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-2.6

Open this sounding in Storm Lab

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 6, 7:20 PM CDTSevere Thunderstorm WarningBROJim Hogg25 min
Sep 6, 9:16 PM CDTSpecial Weather StatementBROStarr29 min
Sep 6, 9:51 PM CDTSpecial Weather StatementBROStarr24 min
Sep 6, 10:03 PM CDTAreal Flood AdvisoryBROStarr, Zapata117 min
Sep 7, 4:47 AM CDTAreal Flood AdvisoryBROHidalgo, Starr3 hr
Sep 7, 4:49 AM CDTAreal Flood AdvisoryBROJim Hogg, Zapata119 min
Sep 7, 6:22 AM CDTAreal Flood AdvisoryBROJim Hogg, Starr, Zapata3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2025Every severe thunderstorm 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.