textproduct: Houston/Galveston

KEY MESSAGES

- Heat will remain a concern through midweek, with heat indices nearing 107F (41-42C) and overnight lows only falling into the upper 70s to lower 80s (26-28C).

- A high risk of strong rip currents will continue through the next few days.

DISCUSSION

Issued at 120 PM CDT Sun Jun 21 2026

After days of active weather, we're finally beginning to see the end of precip for a few days. Earlier showers and thunderstorms have all but dissipated, with a few lingering showers moving eastward and out of our area. The weak boundary and surface low that generated the convection seem to have weakened and drifted south as ridging builds in from the west. Clouds will linger for a few more hours, keeping temps from warming too much, the exception being our far northwest areas. Being the longest day of the year, though, we'll have enough time for highs to warm into the mid 80s.

Upper ridging will dominate the weather pattern through much of the work work, with mid and upper level flow becoming more zonal. This will cut us off from the deep layer moisture that's been in place, with drier air working it's way in. We'll go from nearing the climatological max for PWs last week to nearing the 25th percentile next week. Given the lower moisture and subsidence, have kept very low PoPs in the forecast. Unfortunately, hot conditions will also persist under the ridge, with highs climbing into the mid 90s next week. Dewpoints will lessen and overnight lows will fall into the mid 70s, so a slight reprieve from the more oppressive heat. That said, heat indices will climb into the triple digits, but should stay below heat advisory criteria, except for maybe a few isolated spots.

AVIATION

(18Z TAF Issuance) Issued at 1205 PM CDT Sun Jun 21 2026

Gusty winds of 15-20KT are expected at all terminals through the afternoon and early evening. Generally, winds are out of the SSE. Winds remain elevated overnight, at 7-9KT inland and 10-15KT near the coast. There is a low chance of thunderstorms this afternoon, though a few scattered showers can't be ruled out, which could briefly lower visibility. CIGs prevail at VFR until an MVFR deck settles in late this evening and overnight. CIGs are expected to lift back to VFR and gusts return by mid- morning tomorrow.

MARINE

Issued at 120 PM CDT Sun Jun 21 2026

Moderate onshore flow will persist through Monday morning, followed by light to moderate onshore flow from midweek onward. Seas of 3 to 6 feet are expected through Monday.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 78 93 78 94 / 0 0 0 0 Houston (IAH) 79 93 79 94 / 0 0 0 0 Galveston (GLS) 84 89 83 89 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...High Rip Current Risk through Monday evening for TXZ436>439.

GM...Small Craft Should Exercise Caution through Monday afternoon for GMZ330-335-350-355-370-375.