textproduct: Houston/Galveston

KEY MESSAGES

- Warm and humid conditions continue through the end of the work week with heat index values in the 90s Thursday/Friday.

- Numerous showers and thunderstorms are expected to develop along a cold front Saturday afternoon and evening. Heavy rainfall will be possible which could lead to instances of minor flooding of urban, low-lying and poor drainage areas.

- Moderate to strong northeasterly winds and building seas are expected Saturday night through Sunday evening following the passage of the cold front.

- Seasonal conditions expected in the wake of the front going into early next week.

DISCUSSION

Issued at 1100 PM CDT Wed Apr 15 2026

More of the same through the end of the work week as south- southeasterly flow at the surface and southwesterly flow aloft keep the unseasonably warm, moist conditions in place. Afternoon high temperatures will be in the mid to upper 80s inland and upper 70s to low 80s along the coast. Combination of daytime heating and increased moisture may lead to very isolated, light streamer showers during the late morning and afternoon hours - but, the overall chance for a specific location to get a light shower is <10%. Afternoon high temperatures through Friday will be in the mid to upper 80s inland and upper 70s to low 80s along the coast. Overnight lows will be in the upper 60s to low 70s.

Saturday will start out similar to the previous few days (warm, muggy), but we are expecting an increase in shower and thunderstorms activity through the day on Saturday into Saturday night. This increase in activity will be due a cold front that will be moving through the region late Saturday and a weak pre- frontal trough that moves overhead. Moisture is anticipated to increase ahead of the front with PWATs up to around 1.75-2", so any thunderstorms that are able to develop ahead of or along the cold front may be able to produce locally heavy rainfall with rainfall rates up to 2-3" per hour. WPC has placed areas along and north of I-10 in a Marginal Risk (level 1 of 4) for excessive rainfall. If any of these heavy thunderstorms move over a low- lying spot or area of poor drainage, then minor street flooding or ponding may occur. Coastal showers may linger through Sunday morning as moisture lingers behind the FROPA. Breezy conditions are expected along the coast Saturday night through Sunday evening following the passage of the cold front.

Cooler weather is expected Sunday and Monday with afternoon high temperatures in the upper 60s to low 70s and overnight lows down into the mid 50s to low 60s. Southerly flow is expected to return by late Monday, so an increase in temperatures is expected by mid-week. Rain chances return Monday through midweek as upper- level disturbance move through the region.

Fowler

AVIATION

(12Z TAF Issuance) Issued at 604 AM CDT Thu Apr 16 2026

MVFR cigs are ongoing at most terminals this morning, though IFR cigs have developed near CXO, IAH, and SGR. Have generally included IFR cigs (either prevailing or TEMPOs) from SGR/IAH northward for the next couple hours. Cigs will rise to VFR by this afternoon with breezy SSE winds. Cigs will once again drop to MVFR later tonight.

Young

MARINE

Issued at 1100 PM CDT Wed Apr 15 2026

Onshore flow of around 10-15kt with occasional gusts to 20kt near the coast will persist through Saturday afternoon. Because of the expected gusts to near 20kt, small craft should exercise caution in the Bays and nearshore waters on Thursday. Another lowering of the winds is expected overnight Thursday into Friday morning, but increase again to 15-20kt Friday afternoon into early Saturday morning. Seas will continue to be 2-4ft through Friday night.

An approaching cold front will lead to scattered showers and thunderstorms beginning Saturday afternoon into Saturday night, with showers possibly lingering through Sunday morning. The cold front will usher in strong northeasterly to east-northeasterly winds (20-25kt with gusts to 30kt) Saturday night into Sunday evening. This will cause seas to build to 5-8ft with occasional seas to 10ft in the waters beyond 40nm. Easterly winds around 15-20kt will continue into Monday with 4-6ft seas continuing into midweek.

The persistent onshore winds will lead to elevated tide levels through Saturday with high tides rising to around 3.0ft above MLLW. Moderate to strong rip currents along Gulf-facing beaches will also be likely.

Fowler

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 88 67 87 69 / 0 0 0 0 Houston (IAH) 88 70 85 71 / 0 0 0 0 Galveston (GLS) 80 73 79 75 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Should Exercise Caution through this evening for GMZ330-335-350-355.