FEMA Issues Flood Watch for Entire Houston Region

10/24/25 @ 5PM– FEMA and the National Weather Service Houston/Galveston office have issued a flood watch for the Houston region that will last until October 26 at 5:00AM CDT. See details below.

WHAT

Flooding caused by excessive rainfall is possible.

WHERE

A portion of southeast Texas, including the following areas, Austin, Bolivar Peninsula, Brazoria Islands, Brazos,
Burleson, Chambers, Coastal Brazoria, Coastal Galveston, Coastal Harris, Coastal Matagorda, Colorado, Fort Bend, Galveston Island, Grimes, Houston, Inland Brazoria, Inland Galveston, Inland Harris, Inland Matagorda, Madison, Matagorda Islands, Montgomery, Northern Liberty, Polk, San Jacinto, Southern Liberty, Trinity, Walker, Waller, Washington and Wharton.

WHEN

From late tonight through early Sunday morning.

IMPACTS

Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.

ADDITIONAL DETAILS

Although soils are dry ahead of this heavy rainfall event, guidance for high rainfall rates suggests some instances of flash flooding. There will be two rounds of heavy rainfall with the first one being late Friday night into Saturday morning and then again Saturday evening into early Sunday morning.

Expect widespread rainfall totals of 2-4″ with isolated higher amounts up to 4-6″. Rainfall rates in the strongest storms could exceed 2-3″ per hour. That could lead to flash flooding if these rainfall rates occur for a prolonged period of time.

We will see a lull in the activity late Saturday morning into the afternoon. That will allow for drainage. So, the flood threat is primarily driven by the potential for high rainfall rates.

You should monitor forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

RadarScope Image

At 4:15 PM, a large complex of thunderstorms moving across the Hill Country could clearly be seen on radar images.

*From Radarscope Pro at 4:15 PM on 10/24/25 using multiple radar sensors.*

The warning areas within the boxes above currently indicate:

Hail from 1″ to 2.5″ in diameter
Winds up to 60 MPH
Rainfall of 1′ to 2″ per hour

Jeff Lindner, Harris County Meteorologist, says tornadoes are possible.

The first line of thunderstorms should move through the Lake Houston area shortly before sunrise Saturday.

Second Line of Thunderstorms Expected Saturday Afternoon

Lindner added that a second round of storms looks to develop Saturday afternoon across the Brazos Valley. It should push southeast across our area. This threat will last from mid to late afternoon well into the evening hours on Saturday. The activity will move from northeast to southeast across the area.

ABC13’s future track predicted the Lake Houston area accumulations could approach six inches of rain after the second round clears the area.

The break between rounds of storms should reduce stream and channel flooding.

Lake Report

Lake Conroe is already down a foot and not releasing water.

Lake Houston is down almost half a foot and releasing water at the rate of 4,500 cubic feet per second. The City hopes to lower the lake by a foot ahead of the storm.