textproduct: Houston/Galveston

KEY MESSAGES

- Another cool and dry day expected for the rest of Sunday. - Hazardous marine conditions persist offshore. Small craft should exercise caution until 7 PM CDT this evening. Conditions will continue improving overnight into Monday.

- Warmer temperatures return this week, but just seasonable in nature. Rain chances will generally remain low across our CWA outside of Tuesday, where a passing Gulf trough could bring rain to our offshore waters and Matagorda Bay.

DISCUSSION

Issued at 140 PM CDT Sun Oct 18 2026

As high pressure sits overhead, the rest of Sunday will look similar to Saturday, albeit a bit warmer. We can expect clear to partly cloudy skies, highs in the low to mid 70s, and overnight lows in the 50s, with coastal locations seeing warmer lows in the 60s. Winds remain somewhat elevated offshore, with recent measurements offshore of Matagorda County indicating sustained winds of 20-25 mph and gusts beyond that range. Therefore, small crafts should exercise caution throughout the afternoon and evening hours.

Looking toward the upcoming work week, ridging to our NE will provide easterly flow that will allow temperatures to warm back up. The combination of ridging near the surface and in the mid-levels to our SW will also keep us pretty dry, as evident in forecasted PWATs generally staying under 1.5''. Therefore, PoPs through the week will likely remain under 10%, with a notable exception on Tuesday as a passing surface trough in the Gulf will likely bring rain to our offshore waters, and possibly Matagorda Bay.

AVIATION

(18Z TAF Issuance) Issued at 140 PM CDT Sun Oct 18 2026

VFR conditions persist through the period. Winds will be NE/ENE at 5- 10 kts before becoming calm and variable this evening. Winds strengthen by mid-morning tomorrow out of the ENE/E, with TAF sites along and south of I-10 seeing sustained winds of 10-15 kts. Our northern TAF sites will see lighter sustained winds in the 5-10 kt range.

JMG

MARINE

Issued at 140 PM CDT Sun Oct 18 2026

As high pressure transitions off to our east, a long fetch of moderate easterly winds will set up across the northern Gulf Coast this week. Speeds will generally be between 10 and 20 knots and seas in the 3 to 5 foot range through midweek, though there could be some intermittent periods of slightly higher speeds and seas in the offshore Gulf waters which could warrant caution or advisory flags for short time periods.

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PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 52 77 55 82 / 0 0 0 0 Houston (IAH) 58 78 59 82 / 0 0 0 0 Galveston (GLS) 70 77 72 79 / 10 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Should Exercise Caution until 7 PM CDT this evening for GMZ370-375.