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 125 PM CDT Tue Jun 23 2026

Latest water vapor imagery shows upper ridging over much of the western CONUS, with a trough along the east coast. At the surface, high pressure continues to build along the northern Gulf, keeping southerly surface flow across the region. The upper ridge will maintain its hold on the weather pattern for the next few days. This will keep a mostly dry forecast, with drier air limiting any chance of convection. Afternoon highs will warm into the lower to mid 90s each afternoon, under mostly clear skies. Fortunately, with lower dewpoints and moisture, heat indices will remain below heat advisory criteria.

The axis of the ridge will slowly move eastward this weekend, with the area becoming situated on the western periphery of the ridge by early next week. Flow through the vertical column will become southerly, filtering moisture back into the region. This will bring a return of daily afternoon thunderstorms, with coverage dependent on any mesoscale features that can initiated the convection. Given the lack of forcing, will keep little to no PoPs in the forecast through the period. Temperatures will generally remain the same each day, with highs in the lower to mid 90s and lows in the lower to mid 70s.

AVIATION

(00Z TAF Issuance) Issued at 627 PM CDT Tue Jun 23 2026

VFR conditions will generally prevail across the region through the period. MVFR ceilings may develop over locations generally to the west and northwest of the Houston metro area overnight into Wednesday morning. MVFR ceilings have been included in the CLL, UTS, and CXO TAFs between 09-15Z. Confidence remained too low to include MVFR ceilings in the other terminal forecasts, including IAH and HOU. Light southerly winds will otherwise prevail through the forecast period.

MARINE

Issued at 125 PM CDT Tue Jun 23 2026

Light to moderate onshore flow will persist through the week. Seas will stay between 2 and 5 feet.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 76 94 73 94 / 0 0 0 0 Houston (IAH) 77 94 75 93 / 0 0 0 0 Galveston (GLS) 82 89 81 88 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...High Rip Current Risk until 7 PM CDT this evening for TXZ436>439.

GM...None.