NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Fri, May 22, 2026 at 1:22:24 am CDT

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Heavy Rainfall Risk Through Weekend

Observed and Forecast Rainfall

Flood Watch

Forecast Rainfall Totals

Current radar loop for Houston, TX.

Multiple rounds of showers and thunderstorms containing moderate to heavy rainfall expected through the weekend. Locally heavy rainfall capable of at least minor flooding is expected. River rises to action and minor flood state expected by the weekend.

Widespread 1 to 3 inches of rain fell over the last 48 hours with highest totals of 6-8+ inches along the coast. Rainfall totals over the next several days will come in multiple rounds. Lower rainfall totals tonight into Friday, followed by higher totals over the holiday weekend. Higher rainfall totals of 2-4+ inches are expected Saturday through Monday.

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.

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	00:35	Overcast	10	68	66	93	SW 6	-	29.89
College Station	00:53	Clear	10	69	67	92	SSE 5	-	29.85
Huntsville	00:53	Clear	10	71	70	96	SE 6	-	29.85
Navasota	00:55	Clear	10	69	69	100	S 3	-	29.85
Conroe	00:53	Partly Cloudy	10	71	70	96	CALM	-	29.85
Hooks Airport	00:53	Clear	9	70	67	90	S 3	-	29.84
Intercontinental Airport	00:53	Mostly Clear	10	72	70	93	S 5	-	29.84
Houston Hobby Airport	00:53	Partly Cloudy	10	73	69	87	SE 10	-	29.82
Sugar Land	00:53	Clear	10	72	69	90	CALM	-	29.85
Wharton	01:10	Light Rain	5	68	66	93	N 17G24	-	30.08
Pearland	00:53	Clear	10	72	69	90	SSE 8	-	29.85
Ellington Field	00:24	Mostly Clear	10	71	69	94	SE 5	-	29.83
La Porte	00:35	Clear	10	71	70	94	SE 8	-	29.85
Angleton/Lake Jackson	00:53	Clear	10	70	69	96	SE 5	-	29.86
Galveston	00:52	Clear	10	73	71	93	SSE 3	-	29.88
Bay City	00:55	Clear	10	70	70	100	SSE 7	-	29.83
Palacios	00:53	Mostly Clear	9	73	71	93	SSE 6	-	29.87
Rig 20 Miles SE of Galveston	00:55	Clear	10	77	69	78		-	29.88
Rig 20 Miles SE of Matagorda	01:00		10	77	73	88	VRB 5	-	29.94

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