Alert archive / Texas / Flash Flood Warnings in 2026

Flash Flood Warning 32, NWS Houston/Galveston, TX

September 1, 2026Polk County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Sep 1, 2026, 11:09 PM CDT for Polk County, Texas. It was in force for 7 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
Sep 1, 2026, 11:09 PM CDT (04:09 UTC)
Expired
Sep 2, 2026, 6:15 AM CDT
In force
7 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

County Polk County, TX

The radar

The Houston radar (KHGX), 149 km from the middle of the area, began a volume at 04:10 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.2 hours before the alert went out and 173 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, Lake Charles Mun, LA at 00:00Z on 2026-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 823 joules per kilogram.LCLEL10008507005003002001001 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, Lake Charles Mun, LA at 00:00Z on 2026-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
823 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
212 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Sep 1, 7:43 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Sep 1, 7:43 PM CDT, 3 hours 26 minutes before
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The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 10:24 PM CDTAreal Flood AdvisoryHGXLiberty, Polk, San Jacinto3 hr
Sep 2, 1:32 AM CDTFlash Flood WarningHGXPolk5 hr
Sep 2, 2:06 AM CDTAreal Flood AdvisoryHGXChambers, Liberty99 min
Sep 2, 2:22 AM CDTFlash Flood WarningHGXChambers, Liberty4 hr
Sep 2, 2:26 AM CDTSpecial Weather StatementHGXHardin34 min
Sep 2, 3:44 AM CDTFlash Flood WarningHGXLiberty3 hr
Sep 2, 5:51 AM CDTFlash Flood WarningHGXLiberty, Montgomery, San Jacinto4 hr
Sep 2, 6:04 AM CDTFlash Flood Warning Considerable damage threatHGXPolk, San Jacinto3 hr
Sep 2, 6:53 AM CDTFlash Flood Warning Considerable damage threatHGXLiberty3 hr
Sep 2, 6:53 AM CDTSpecial Marine WarningHGX52 min
Sep 2, 7:16 AM CDTAreal Flood AdvisoryHGXPolk, San Jacinto, Trinity, Walker119 min
Sep 2, 7:25 AM CDTAreal Flood AdvisoryHGXPolk, Trinity5 hr
Sep 2, 9:23 AM CDTFlash Flood Warning Considerable damage threatHGXLiberty, Polk4 hr
Sep 2, 10:35 AM CDTRiver Flood WarningHGXPolk, San Jacinto29 hr
Sep 2, 10:56 AM CDTRiver Flood WarningHGXHardin, Liberty, Polk70 hr
Sep 2, 12:21 PM CDTFlash Flood WarningHGXPolk, Trinity7 hr
Sep 2, 1:06 PM CDTAreal Flood WarningHGXLiberty3 hr
Sep 2, 2:35 PM CDTAreal Flood AdvisoryHGXPolk, San Jacinto, Walker3 hr
Sep 2, 3:03 PM CDTFlash Flood Warning Considerable damage threatHGXPolk4 hr
Sep 2, 4:41 PM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto49 min
Sep 2, 4:42 PM CDTAreal Flood AdvisoryHGXMontgomery, San Jacinto, Walker36 min
Sep 2, 4:49 PM CDTFlash Flood Warning Considerable damage threatHGXPolk, San Jacinto6 hr
Sep 2, 5:18 PM CDTFlash Flood WarningHGXMontgomery, Polk, San Jacinto, Walker4 hr
Sep 2, 5:30 PM CDTSevere Thunderstorm WarningHGXLiberty, Polk, San Jacinto30 min
Sep 2, 6:00 PM CDTSpecial Weather StatementHGXPolk30 min
Sep 2, 6:15 PM CDTFlash Flood WarningHGXLiberty, San Jacinto3 hr
Sep 2, 6:40 PM CDTSpecial Weather StatementHGXPolk35 min
Sep 2, 6:47 PM CDTTornado WarningHGXMontgomery28 min
Sep 2, 6:59 PM CDTAreal Flood AdvisoryHGXMontgomery2 hr

Nearby

Flash Flood Warnings in Texas, 2026Every flash flood 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.