Alert archive / Texas / Flash Flood Warnings in 2025

Flash Flood Warning 9, NWS Houston/Galveston, TX

June 12, 2025Chambers County, Harris County, Liberty County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Jun 12, 2025, 5:29 AM CDT for Chambers County, Harris County, Liberty County, Texas. It was in force for 2 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
Jun 12, 2025, 5:29 AM CDT (10:29 UTC)
Expired
Jun 12, 2025, 7:30 AM CDT
In force
2 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Chambers County, TX, Harris County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 50 km from the middle of the area, began a volume at 10:34 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

Corpus Christi, TX (KCRP), launched 00:00Z, 10.5 hours before the alert went out and 335 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, Corpus Christi, TX at 00:00Z on 2025-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1936 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, Corpus Christi, TX at 00:00Z on 2025-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1936 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

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 Jun 12, 5:05 AM CDT, 24 minutes earlier.

Area forecast discussion, Jun 12, 5:05 AM CDT, 24 minutes before
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In the hours before

Special weather statement, Jun 12, 1:47 AM CDT, 3 hours 42 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
147 AM CDT Thu Jun 12 2025

TXZ235-236-335-336-120715-
Coastal Matagorda TX-Inland Matagorda TX-Coastal Jackson TX-
Inland Jackson TX-
147 AM CDT Thu Jun 12 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN JACKSON AND WEST
CENTRAL MATAGORDA COUNTIES THROUGH 215 AM CDT...

At 147 AM CDT, Doppler radar was tracking a strong thunderstorm near
Schicke Point, or near Palacios, moving north at 20 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Palacios, Port Alto, Blessing, and Schicke Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2864 9632 2868 9632 2867 9639 2867 9637
      2866 9636 2864 9635 2864 9636 2865 9642
      2867 9641 2868 9642 2870 9641 2872 9641
      2870 9644 2870 9646 2896 9643 2889 9613
      2863 9625
TIME...MOT...LOC 0647Z 194DEG 15KT 2872 9635

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

03
Local storm report, Jun 12, 2:09 AM CDT, 3 hours 20 minutes before
Preliminary Local Storm Report
National Weather Service Houston/Galveston TX
209 AM CDT Thu Jun 12 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0118 AM     Marine Tstm Wind 17 SSW La Ward          28.64N 96.61W
06/12/2025  M43 MPH          GMZ330             TX   Mesonet

            Mesonet station VCAT2 1 NNE Port Lavaca.

0100 AM     Marine Tstm Wind 21 SSW Palacios         28.42N 96.33W
06/12/2025  M39 MPH          GMZ350             TX   Mesonet

            Mesonet station MBET2 13 ESE Magnolia Beach.

1124 PM     Marine Tstm Wind 20 SSW Palacios         28.45N 96.39W
06/11/2025  M37 MPH          GMZ330             TX   Buoy

            Buoy station PCNT2 Port O'Connor, TX.

&&
Special weather statement, Jun 12, 4:13 AM CDT, 1 hour 16 minutes before
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Special weather statement, Jun 12, 4:54 AM CDT, 35 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 12:37 AM CDTSpecial Marine WarningHGX38 min
Jun 12, 12:45 AM CDTSevere Thunderstorm WarningHGXJackson, Matagorda45 min
Jun 12, 1:46 AM CDTSevere Thunderstorm WarningHGXColorado29 min
Jun 12, 1:47 AM CDTSpecial Weather StatementHGXMatagorda28 min
Jun 12, 2:01 AM CDTSevere Thunderstorm Warning Considerable damage threatHGXJackson, Matagorda44 min
Jun 12, 2:35 AM CDTSpecial Marine WarningHGX115 min
Jun 12, 2:43 AM CDTSevere Thunderstorm WarningHGXJackson, Matagorda47 min
Jun 12, 2:52 AM CDTAreal Flood AdvisoryHGXJackson, Matagorda46 min
Jun 12, 3:05 AM CDTSevere Thunderstorm WarningHGXJackson, Matagorda40 min
Jun 12, 3:25 AM CDTTornado WarningHGXFort Bend, Wharton35 min
Jun 12, 3:38 AM CDTFlash Flood WarningHGXJackson, Matagorda8 hr
Jun 12, 3:44 AM CDTSevere Thunderstorm WarningHGXJackson, Matagorda, Wharton61 min
Jun 12, 3:54 AM CDTAreal Flood AdvisoryHGXChambers, Harris3 hr
Jun 12, 4:13 AM CDTSpecial Weather StatementHGXMatagorda32 min
Jun 12, 4:23 AM CDTAreal Flood AdvisoryHGXHarris2 hr
Jun 12, 4:40 AM CDTFlash Flood WarningHGXMatagorda7 hr
Jun 12, 4:41 AM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto, Trinity49 min
Jun 12, 4:52 AM CDTAreal Flood AdvisoryHGXHarris, Liberty, Montgomery116 min
Jun 12, 4:54 AM CDTSpecial Weather StatementHGXMatagorda51 min
Jun 12, 4:56 AM CDTSpecial Marine WarningHGX49 min
Jun 12, 5:25 AM CDTSevere Thunderstorm WarningHGXPolk, Trinity35 min
Jun 12, 5:35 AM CDTSpecial Weather StatementHGXHouston40 min
Jun 12, 5:40 AM CDTAreal Flood AdvisoryHGXBrazoria, Galveston, Matagorda5 hr
Jun 12, 5:47 AM CDTSpecial Weather StatementHGXBrazoria28 min
Jun 12, 5:58 AM CDTAreal Flood AdvisoryHGXBrazos, Burleson, Grimes, Houston, Madison, Montgomery and 2 more3 hr
Jun 12, 6:08 AM CDTSpecial Weather StatementHGXMatagorda52 min
Jun 12, 6:25 AM CDTSpecial Weather StatementHGXBrazoria50 min
Jun 12, 6:29 AM CDTSpecial Weather StatementHGXColorado46 min
Jun 12, 6:41 AM CDTSpecial Weather StatementHGXBrazoria49 min
Jun 12, 6:48 AM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston, Harris27 min
Jun 12, 7:10 AM CDTSpecial Weather StatementHGXGalveston50 min
Jun 12, 7:13 AM CDTSpecial Marine WarningHGX62 min
Jun 12, 7:17 AM CDTRiver Flood WarningHGXPolk, San Jacinto, Trinity, Walker21 days
Jun 12, 7:37 AM CDTAreal Flood AdvisoryHGXBrazoria, Chambers, Galveston, Harris, Liberty, Montgomery5 hr
Jun 12, 7:57 AM CDTSpecial Weather StatementHGXChambers48 min
Jun 12, 7:59 AM CDTSpecial Marine WarningHGX46 min
Jun 12, 8:11 AM CDTSpecial Marine WarningHGX34 min
Jun 12, 8:16 AM CDTAreal Flood AdvisoryHGXColorado, Fort Bend, Jackson, Wharton3 hr
Jun 12, 8:19 AM CDTSpecial Weather StatementHGXLiberty41 min
Jun 12, 8:39 AM CDTSpecial Weather StatementHGXChambers51 min
Jun 12, 8:44 AM CDTSpecial Marine WarningHGX31 min
Jun 12, 9:04 AM CDTAreal Flood WarningHGXChambers, Galveston, Harris, Liberty3 hr
Jun 12, 9:12 AM CDTAreal Flood AdvisoryHGXHouston, Madison, Trinity, Walker3 hr
Jun 12, 9:19 AM CDTRiver Flood WarningHGXMatagorda, Wharton60 hr
Jun 12, 10:24 AM CDTFlash Flood WarningHGXBrazoria, Matagorda111 min
Jun 12, 11:13 AM CDTAreal Flood WarningHGXJackson, Wharton62 min
Jun 12, 11:24 AM CDTSpecial Marine WarningHGX2 hr
Jun 12, 11:58 AM CDTAreal Flood WarningHGXBrazoria, Jackson, Matagorda, Wharton9 hr
Jun 12, 12:08 PM CDTAreal Flood WarningHGXChambers, Galveston, Harris, Liberty52 min
Jun 12, 1:16 PM CDTSmall Craft AdvisoryHGX13 hr
Jun 12, 2:19 PM CDTRiver Flood WarningHGXBrazoria, Fort Bend, Wharton4 days

Nearby

Flash Flood Warnings in Texas, 2025Every flash flood 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.