Alert archive / Texas / Flash Flood Warnings in 2025

Flash Flood Warning 10, NWS Houston/Galveston, TX

June 12, 2025Brazoria County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Jun 12, 2025, 10:24 AM CDT for Brazoria County, Matagorda County, Texas. It was in force for 111 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: Jun 12, 2025, 10:24 AM CDT (15:24 UTC)
Expired: Jun 12, 2025, 12:15 PM CDT
In force: 111 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

Counties Brazoria County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 83 km from the middle of the area, began a volume at 15:27 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 (KNGP), launched 12:00Z, 3.4 hours before the alert went out and 211 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2602 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

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, 6:24 AM CDT, 4 hours earlier.

Area forecast discussion, Jun 12, 6:24 AM CDT, 4 hours before

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In the hours before

Special weather statement, Jun 12, 6:41 AM CDT, 3 hours 43 minutes before

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Special weather statement, Jun 12, 7:10 AM CDT, 3 hours 14 minutes before

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Special weather statement, Jun 12, 7:57 AM CDT, 2 hours 27 minutes before

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Special weather statement, Jun 12, 8:19 AM CDT, 2 hours 5 minutes before

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Special weather statement, Jun 12, 8:39 AM CDT, 1 hour 45 minutes before

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Local storm report, Jun 12, 9:03 AM CDT, 1 hour 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 12:37 AM CDT	Special Marine Warning	HGX		38 min
Jun 12, 12:45 AM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda	45 min
Jun 12, 1:46 AM CDT	Severe Thunderstorm Warning	HGX	Colorado	29 min
Jun 12, 1:47 AM CDT	Special Weather Statement	HGX	Matagorda	28 min
Jun 12, 2:01 AM CDT	Severe Thunderstorm Warning Considerable damage threat	HGX	Jackson, Matagorda	44 min
Jun 12, 2:35 AM CDT	Special Marine Warning	HGX		115 min
Jun 12, 2:43 AM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda	47 min
Jun 12, 2:52 AM CDT	Areal Flood Advisory	HGX	Jackson, Matagorda	46 min
Jun 12, 3:05 AM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda	40 min
Jun 12, 3:25 AM CDT	Tornado Warning	HGX	Fort Bend, Wharton	35 min
Jun 12, 3:38 AM CDT	Flash Flood Warning	HGX	Jackson, Matagorda	8 hr
Jun 12, 3:44 AM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda, Wharton	61 min
Jun 12, 3:54 AM CDT	Areal Flood Advisory	HGX	Chambers, Harris	3 hr
Jun 12, 4:13 AM CDT	Special Weather Statement	HGX	Matagorda	32 min
Jun 12, 4:23 AM CDT	Areal Flood Advisory	HGX	Harris	2 hr
Jun 12, 4:40 AM CDT	Flash Flood Warning	HGX	Matagorda	7 hr
Jun 12, 4:41 AM CDT	Severe Thunderstorm Warning	HGX	Polk, San Jacinto, Trinity	49 min
Jun 12, 4:52 AM CDT	Areal Flood Advisory	HGX	Harris, Liberty, Montgomery	116 min
Jun 12, 4:54 AM CDT	Special Weather Statement	HGX	Matagorda	51 min
Jun 12, 4:56 AM CDT	Special Marine Warning	HGX		49 min
Jun 12, 5:25 AM CDT	Severe Thunderstorm Warning	HGX	Polk, Trinity	35 min
Jun 12, 5:29 AM CDT	Flash Flood Warning	HGX	Chambers, Harris, Liberty	2 hr
Jun 12, 5:35 AM CDT	Special Weather Statement	HGX	Houston	40 min
Jun 12, 5:40 AM CDT	Areal Flood Advisory	HGX	Brazoria, Galveston, Matagorda	5 hr
Jun 12, 5:47 AM CDT	Special Weather Statement	HGX	Brazoria	28 min
Jun 12, 5:58 AM CDT	Areal Flood Advisory	HGX	Brazos, Burleson, Grimes, Houston, Madison, Montgomery and 2 more	3 hr
Jun 12, 6:08 AM CDT	Special Weather Statement	HGX	Matagorda	52 min
Jun 12, 6:25 AM CDT	Special Weather Statement	HGX	Brazoria	50 min
Jun 12, 6:29 AM CDT	Special Weather Statement	HGX	Colorado	46 min
Jun 12, 6:41 AM CDT	Special Weather Statement	HGX	Brazoria	49 min
Jun 12, 6:48 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Galveston, Harris	27 min
Jun 12, 7:10 AM CDT	Special Weather Statement	HGX	Galveston	50 min
Jun 12, 7:13 AM CDT	Special Marine Warning	HGX		62 min
Jun 12, 7:17 AM CDT	River Flood Warning	HGX	Polk, San Jacinto, Trinity, Walker	21 days
Jun 12, 7:37 AM CDT	Areal Flood Advisory	HGX	Brazoria, Chambers, Galveston, Harris, Liberty, Montgomery	5 hr
Jun 12, 7:57 AM CDT	Special Weather Statement	HGX	Chambers	48 min
Jun 12, 7:59 AM CDT	Special Marine Warning	HGX		46 min
Jun 12, 8:11 AM CDT	Special Marine Warning	HGX		34 min
Jun 12, 8:16 AM CDT	Areal Flood Advisory	HGX	Colorado, Fort Bend, Jackson, Wharton	3 hr
Jun 12, 8:19 AM CDT	Special Weather Statement	HGX	Liberty	41 min
Jun 12, 8:39 AM CDT	Special Weather Statement	HGX	Chambers	51 min
Jun 12, 8:44 AM CDT	Special Marine Warning	HGX		31 min
Jun 12, 9:04 AM CDT	Areal Flood Warning	HGX	Chambers, Galveston, Harris, Liberty	3 hr
Jun 12, 9:12 AM CDT	Areal Flood Advisory	HGX	Houston, Madison, Trinity, Walker	3 hr
Jun 12, 9:19 AM CDT	River Flood Warning	HGX	Matagorda, Wharton	60 hr
Jun 12, 11:13 AM CDT	Areal Flood Warning	HGX	Jackson, Wharton	62 min
Jun 12, 11:24 AM CDT	Special Marine Warning	HGX		2 hr
Jun 12, 11:58 AM CDT	Areal Flood Warning	HGX	Brazoria, Jackson, Matagorda, Wharton	9 hr
Jun 12, 12:08 PM CDT	Areal Flood Warning	HGX	Chambers, Galveston, Harris, Liberty	52 min
Jun 12, 1:16 PM CDT	Small Craft Advisory	HGX		13 hr
Jun 12, 2:19 PM CDT	River Flood Warning	HGX	Brazoria, Fort Bend, Wharton	4 days

Nearby

Flash Flood Warnings in Texas, 2025 Every 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.