textproduct: Houston/Galveston

KEY MESSAGES

- Hot conditions will continue this week, with potential for heat stress issues as heat indices approach 107F (41-42C) each day.

- A high risk of strong rip currents will continue early this week.

DISCUSSION

Issued at 1211 AM CDT Tue Jun 23 2026

Hot weather and low rain chances will persist as strengthening mid level ridging continues to hold sway from south TX across the northern Gulf. This pattern will continue to deflect a series upper disturbances and associated convection north and northeast of our area over the next several days. High temps will remain in the lower to middle 90s (32-36 C) with heat indices topping out in 103-107 F (39-42 C) range. Over the next few days, it's possible a few areas to briefly reach heat advisory criteria during the afternoon, but with somewhat better daytime mixing, dewpoints should drop enough to keep heat indices in check. Still, caution is advised especially for those most vulnerable to heat stress impacts. And for beachgoers, strong rip currents will remain a concern over the next few days.

There are some hints the mid/upper ridge will break down enough toward the end of the week for isolated diurnal convection to return to southeast TX by this weekend or early next week. However, probabilities are not yet high enough to warrant mention in the official forecast.

AVIATION

(12Z TAF Issuance) Issued at 518 AM CDT Tue Jun 23 2026

MVFR CIGS and patchy fog should clear out later this morning with VFR conditions prevailing throughout the daytime. MVFR CIGS may develop in spots overnight/early Wednesday morning. Areas north/west of the Houston Metro are generally more at risk of seeing MVFR conditions develop during this early morning period. Otherwise most terminals may see lower decks around 1800-2800 ft during the morning, though staying predominantly VFR.

03

MARINE

Issued at 1211 AM CDT Tue Jun 23 2026

Steady light to moderate southerly onshore flow will persist through most of this week, trending up a bit by this weekend. Seas will generally remain between 2 and 4 feet.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 94 76 94 74 / 0 0 0 0 Houston (IAH) 95 77 95 75 / 0 0 0 0 Galveston (GLS) 89 82 89 81 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

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

GM...None.