NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Mon, May 25, 2026 at 10:44:26 pm CDT

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There are no watches, warnings, or advisories at this time.

Tonight's Outlook

Ozone Action Day

Heavy Rainfall Risk Mid Week

Forecast Rainfall Totals

Low temperatures in the upper 60s to 70s. Partly cloudy conditions tonight, Isolated showers and thunderstorms possible.

Atmospheric conditions are expected to be favorable for producing high levels of ozone pollution in the Houston, Galveston and surrounding areas through Monday evening.

Chance of showers and thunderstorms returns this week. Slight Excessive Rainfall Risk (Level 2 of 4) for the entire area on Wednesday. Marginal Excessive Rainfall Risk (level 1 of 4) for the western portion of our region on Tuesday. Marginal Excessive Rainfall Risk (level 1 of 4) For the eastern part of the region on Thursday, due to lingering showers and thunderstorms. Localized flash flooding is the most likely impact if repeated strong storms move over the same area.

The threat of heavy rainfall arrives once again mid-week. While isolated to scattered showers and thunderstorms are expected Tuesday through Thursday, the main time frame for heavy rainfall will be past midnight on Tuesday into Wednesday morning. Wide spread totals of 1-2" are forecast, with isolated amounts of up to 3-5" possible. Because of last week's rainfall, soils are already primed. Additional rainfall may lead to runoff and potential street flooding.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Crockett	22:15	Clear	10	71	66	83	CALM	-	29.88
Caldwell	21:55	Lightning Observed	10	71	64	78	CALM	-	29.91
College Station	21:53	Lightning Observed	10	71	66	84	WSW 3	-	29.87
Huntsville	21:53	Clear	10	75	64	68	NE 3	-	29.87
Navasota	22:15	Mostly Clear	10	73	69	85	W 8	-	29.87
Conroe	21:53	Clear	10	75	70	84	VRB 3	-	29.87
Hooks Airport	21:53	Clear	9	72	69	90	CALM	-	29.87
Intercontinental Airport	21:53	Mostly Clear	10	76	69	79	CALM	-	29.86
Houston Hobby Airport	21:53	Mostly Clear	10	79	72	79	S 7	-	29.87
Sugar Land	21:53	Clear	10	77	71	81	S 7	-	29.87
Wharton	01:10	Light Rain	5	68	66	93	N 17G24	-	30.08
Pearland	21:53	Clear	10	77	71	81	CALM	-	29.88
Ellington Field	21:54	Mostly Clear	10	77	71	83	S 6	-	29.86
La Porte	21:55	Clear	10	78	72	80	SSW 6	-	29.88
Angleton/Lake Jackson	21:53	Clear	10	73	71	93	CALM	-	29.87
Galveston	21:52	Clear	10	77	72	84	SSE 6	-	29.88
Bay City	22:15	Clear	8	73	73	100	CALM	-	29.84
Palacios	21:53	Clear	10	76	72	87	SE 7	-	29.86
Rig 20 Miles SE of Galveston	22:15	Clear	10	78	71	78	ESE 10	-	29.89
Rig 20 Miles SE of Matagorda	22:20		10	78	75	88	VRB 3	-	29.91

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