NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Thu, May 21, 2026 at 1:44:17 am CDT

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Flood Warning

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Heavy Rainfall Risk Through Weekend

Observed and Forecast Rainfall

Flood Watch

Forecast Rainfall Totals

High Risk of Rip Currents

Current radar loop for Houston, TX.

Multiple rounds of showers and thunderstorms containing moderate to heavy rainfall expected through the weekend. Marginal Excessive Rainfall Risk (level 1 of 4) for most of Southeast Texas today into early Thursday. Slight Excessive Rainfall Risk (level 2 of 4) all of Southeast Texas on Thursday. Marginal Excessive Rainfall Risk (level 1 of 4) for all of Southeast on Friday. Slight Excessive Rainfall Risk (level 2 of 4) for all of Southeast Texas on Saturday due to potential additional shower/thunderstorm activity.

Widespread 1 to 3 inches of rain fell over the last 24 hours with highest totals of 3-6 inches along the coast. Additional rounds of moderate to heavy rainfall are expect through the holiday weekend.

A Flood Watch is in effect from Thursday morning through Monday morning for portions of southeast Texas, including Jackson, Matagorda, Wharton, Fort Bend, Brazoria, and Galveston counties. Impacts include excessive runoff resulting in flooding of creeks, streams, and other low-lying and flood prone locations.

Unsettled pattern will lead to continued chances for showers and thunderstorms, with additional rounds of moderate to heavy rainfall. Periods of locally heavy rainfall are expected, through the weekend. Rainfall rates will peak in the 3-4+” per hour range in the heaviest downpours. This rainfall will generate runoff and river responses, especially where we see repeated heavy rainfall over the same locations leading to street flooding and river flooding potential through the weekend.

There is a high risk of rip currents along all Gulf facing beaches through Wednesday evening. Stay away from rocks and swim near a life guard.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Crockett	01:35	Rain \ Mist \ Lightning Observed	3	66	66	100	CALM	-	30.09
Caldwell	01:15	Mostly Cloudy	10	71	68	88	ESE 5	-	30.04
College Station	00:53	Mostly Cloudy	10	73	68	84	ESE 7	-	30.02
Huntsville	00:53	Clear	10	70	67	90	ESE 6	-	30.02
Navasota	01:15	Overcast	10	72	72	100	E 5	-	30.01
Conroe	00:53	Mostly Cloudy	10	69	68	96	CALM	-	30.02
Hooks Airport	00:53	Overcast	9	72	70	93	CALM	-	30.01
Intercontinental Airport	00:53	Mostly Cloudy	10	73	70	90	SE 3	-	30.01
Houston Hobby Airport	00:53	Overcast	9	75	70	84	NE 7	-	29.99
Sugar Land	00:53	Overcast	10	75	71	87	NE 3	-	29.99
Wharton	01:10	Light Rain	5	68	66	93	N 17G24	-	30.08
Pearland	01:07	Overcast	9	74	71	90	NE 6	-	30.00
Ellington Field	23:54	Mostly Cloudy	10	73	71	94	NNE 7	-	29.96
La Porte	00:55	Overcast	10	73	71	91	ENE 6	-	30.00
Angleton/Lake Jackson	00:53	Clear	8	72	71	96	NNE 5	-	29.98
Galveston	05:52	Thunder In The Vicinity \ Light Rain \ Lightning Observed	10	73	70	90	NNE 10	-	29.99
Bay City	01:15	Clear	7	73	73	100	NE 3	-	29.94
Palacios	00:53	Clear	8	75	73	93	ENE 6	-	29.96
Rig 20 Miles SE of Galveston	01:15	Mostly Cloudy	10	77	71	83	ESE 9	-	29.98
Rig 20 Miles SE of Matagorda	01:20		10	77	77	100	VRB 3	-	30.00

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