Alert archive / Texas / Flash Flood Warnings in 2024

Flash Flood Warning 28, NWS Houston/Galveston, TX

May 2, 20244 counties in Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 2, 2024, 9:25 AM CDT for 4 counties in Texas. It was in force for 4 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: May 2, 2024, 9:25 AM CDT (14:25 UTC)
Expired: May 2, 2024, 1:16 PM CDT
In force: 4 hr
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

Counties Grimes County, TX, Montgomery County, TX, Walker County, TX, Waller County, TX

The radar

The Houston radar (KHGX), 122 km from the middle of the area, began a volume at 14:28 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 12:00Z, 2.4 hours before the alert went out and 248 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: 591 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 821 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.5

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 May 2, 7:01 AM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, May 2, 7:01 AM CDT, 2 hours 24 minutes before

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In the hours before

Local storm report, May 2, 5:53 AM CDT, 3 hours 32 minutes before

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Special weather statement, May 2, 6:12 AM CDT, 3 hours 13 minutes before

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Local storm report, May 2, 6:32 AM CDT, 2 hours 53 minutes before

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Local storm report, May 2, 7:16 AM CDT, 2 hours 9 minutes before

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Special weather statement, May 2, 8:27 AM CDT, 58 minutes before

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Local storm report, May 2, 9:14 AM CDT, 11 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
May 1, 7:10 PM CDT	Severe Thunderstorm Warning	HGX	Houston	65 min
May 1, 7:24 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Madison, Trinity, Walker	20 min
May 1, 8:42 PM CDT	Severe Thunderstorm Warning	HGX	Houston	29 min
May 1, 9:09 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Trinity, Walker	51 min
May 1, 10:00 PM CDT	Severe Thunderstorm Warning	HGX	Houston, Polk, San Jacinto, Trinity, Walker	45 min
May 1, 10:10 PM CDT	Special Weather Statement	HGX	Madison	35 min
May 1, 10:25 PM CDT	Flash Flood Warning	HGX	Houston, Trinity, Walker	3 hr
May 1, 10:28 PM CDT	Special Weather Statement	HGX	Burleson	32 min
May 1, 10:50 PM CDT	Special Weather Statement	HGX	Walker	25 min
May 1, 11:21 PM CDT	Severe Thunderstorm Warning	HGX	Grimes, Houston, Madison, Montgomery, Trinity, Walker	39 min
May 1, 11:39 PM CDT	Flash Flood Warning	HGX	Grimes, Montgomery, Walker	13 hr
May 2, 12:03 AM CDT	Severe Thunderstorm Warning	HGX	Grimes, Walker	20 min
May 2, 12:21 AM CDT	Flash Flood Warning Considerable damage threat	HGX	Grimes, Walker	3 hr
May 2, 12:27 AM CDT	Special Weather Statement	HGX	Robertson	33 min
May 2, 1:33 AM CDT	Special Weather Statement	HGX	San Jacinto	42 min
May 2, 2:09 AM CDT	Severe Thunderstorm Warning	HGX	Liberty, Polk, San Jacinto	51 min
May 2, 2:55 AM CDT	Severe Thunderstorm Warning	HGX	Liberty, Polk, San Jacinto	50 min
May 2, 3:08 AM CDT	Flash Flood Warning	HGX	Polk, San Jacinto, Trinity, Walker	10 hr
May 2, 4:11 AM CDT	River Flood Warning	HGX	Madison, Walker	5 days
May 2, 4:25 AM CDT	Special Weather Statement	HGX	San Jacinto	50 min
May 2, 4:53 AM CDT	Flash Flood Warning	HGX	Montgomery, Polk, San Jacinto, Walker	8 hr
May 2, 4:55 AM CDT	Special Weather Statement	HGX	Liberty	50 min
May 2, 5:13 AM CDT	Special Weather Statement	HGX	San Jacinto	32 min
May 2, 5:41 AM CDT	Severe Thunderstorm Warning	HGX	Montgomery, San Jacinto, Walker	34 min
May 2, 5:48 AM CDT	Special Weather Statement	HGX	Montgomery, Walker	27 min
May 2, 6:04 AM CDT	Areal Flood Advisory	HGX	Brazos, Grimes	6 hr
May 2, 6:05 AM CDT	Severe Thunderstorm Warning	HGX	Liberty, Montgomery, San Jacinto	25 min
May 2, 6:12 AM CDT	Special Weather Statement	HGX	Montgomery	33 min
May 2, 6:27 AM CDT	Severe Thunderstorm Warning	HGX	Liberty, Polk, San Jacinto	33 min
May 2, 6:32 AM CDT	Areal Flood Advisory	HGX	Grimes, Montgomery, Walker, Waller	3 hr
May 2, 6:58 AM CDT	River Flood Warning	HGX	Polk, San Jacinto	29 hr
May 2, 7:00 AM CDT	Severe Thunderstorm Warning	HGX	Liberty	15 min
May 2, 7:08 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery, Polk, San Jacinto	37 min
May 2, 7:25 AM CDT	Areal Flood Advisory	HGX	Harris, Liberty, Montgomery, Polk, San Jacinto	20 min
May 2, 7:45 AM CDT	Flash Flood Warning	HGX	Harris, Liberty, Montgomery, San Jacinto	6 hr
May 2, 7:57 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery	33 min
May 2, 8:27 AM CDT	Special Weather Statement	HGX	Harris	33 min
May 2, 8:41 AM CDT	River Flood Warning	HGX	Hardin, Liberty, Polk	6 days
May 2, 8:53 AM CDT	Flash Flood Warning	HGX	Harris, Liberty, Montgomery	6 hr
May 2, 9:14 AM CDT	River Flood Warning	HGX	Liberty, Polk, San Jacinto	6 days
May 2, 9:20 AM CDT	River Flood Warning	HGX	Montgomery	4 days
May 2, 9:23 AM CDT	River Flood Warning	HGX	Montgomery	4 days
May 2, 9:26 AM CDT	River Flood Warning	HGX	Montgomery	4 days
May 2, 9:27 AM CDT	Special Weather Statement	HGX	Harris	33 min
May 2, 9:31 AM CDT	River Flood Warning	HGX	Harris, Montgomery	68 hr
May 2, 9:33 AM CDT	Severe Thunderstorm Warning	HGX	Chambers, Harris, Liberty, Montgomery	27 min
May 2, 9:34 AM CDT	River Flood Warning	HGX	Harris, Montgomery	6 days
May 2, 9:36 AM CDT	River Flood Warning	HGX	Harris, Liberty, Montgomery, San Jacinto	72 hr
May 2, 9:43 AM CDT	River Flood Warning	HGX	Harris, Montgomery	71 hr
May 2, 10:25 AM CDT	Special Weather Statement	HGX	Waller	35 min
May 2, 10:45 AM CDT	River Flood Warning	HGX	Harris	21 days
May 2, 10:45 AM CDT	Severe Thunderstorm Warning	HGX	Harris	15 min
May 2, 10:52 AM CDT	River Flood Warning	HGX	Harris	21 days
May 2, 11:00 AM CDT	River Flood Warning	HGX	Harris, Montgomery	11 hr
May 2, 11:00 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Harris	45 min
May 2, 12:52 PM CDT	Areal Flood Warning	HGX	Montgomery, Polk, San Jacinto, Walker	4 hr
May 2, 12:59 PM CDT	Areal Flood Warning	HGX	Grimes, Montgomery, Walker	4 hr
May 2, 1:06 PM CDT	Areal Flood Warning	HGX	Polk, San Jacinto, Trinity, Walker	4 hr
May 2, 1:16 PM CDT	Areal Flood Warning	HGX	Grimes, Montgomery, Walker, Waller	4 hr
May 2, 1:27 PM CDT	Areal Flood Warning	HGX	Harris, Liberty, Montgomery, San Jacinto	4 hr
May 2, 2:14 PM CDT	Areal Flood Warning	HGX	Harris, Liberty	7 hr
May 2, 2:42 PM CDT	Areal Flood Warning	HGX	Harris, Liberty, Montgomery	2 hr
May 2, 5:00 PM CDT	Areal Flood Warning	HGX	Chambers, Harris, Liberty, Montgomery	25 hr
May 2, 5:00 PM CDT	Areal Flood Warning	HGX	Grimes, Houston, Liberty, Madison, Montgomery, Polk and 3 more	25 hr

Nearby

Flash Flood Warnings in Texas, 2024 Every flash flood warning in 2024

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.