textproduct: Houston/Galveston

KEY MESSAGES

- Seasonably hot conditions will continue through the weekend. Peak heat index values between 102-107F (39-42C) through Sunday.

- Moderate to high rip current risk today through the weekend.

- Rain chances re-enter the forecast early-mid next week.

DISCUSSION

Issued at 1222 AM CDT Fri Jun 26 2026

Mid-lvl ridging centered over northern Mexico and West Texas will shift east and become repositioned over the Lower Mississippi Valley by this weekend. Although we will see some increase in low-lvl moisture today with PWATs increasing to around 1.7 inches, this moisture remains shallow with a prominent dry layer noted between about 850 and 500mb. Consequently, despite a few CAMs depicting some streamer showers developing this morning, will leave PoPs at 10 percent or less... and if anything does form it should be transient and isolated. Otherwise, the continued subsident influence of the ridge, and associated mid-lvl dry air will keep PoPs suppressed through early next week. As mentioned in previous discussions a fairly substantial SAL plume will filter into the area Sunday- Tuesday, with the main impact being increasingly Hazy skies and probably some slightly reduced diurnal Cu coverage. Finally heading into the middle of next week the eastern US ridge will lift slightly north and increased moisture will filter into the area on its southern flank, with mentionable rain chances returning to the forecast on Wednesday.

Temperatures will largely range from the upper 80s near the immediate coast to the mid 90s inland each day, with potentially slightly warmer temperatures Sunday-Tuesday as the SAL plume passes overhead. There will be little overnight relief as MinTs run a few degrees above climo. Peak WBGT risk will largely be high (red), but it is possible some warmer locations will reach the Extreme (black) category early next week. So even though we will likely stay just below heat advisory criteria, precautions should still be taken to avoid heat illness, particularly for strenuous activities in direct sunlight.

AVIATION

(12Z TAF Issuance) Issued at 609 AM CDT Fri Jun 26 2026

Patchy MVFR ceilings are occurring early this morning, mainly north and west of the Houston airports. These will mix out or lift to VFR by mid-morning. Another round of MVFR ceilings is possible during the early morning hours Saturday, again mainly north and west of Houston. Otherwise, VFR conditions will prevail through the TAF period. Southerly winds may gust to 20-25 kt at times late this morning through this afternoon.

MARINE

Issued at 1222 AM CDT Fri Jun 26 2026

Winds and seas will increase slightly today through the weekend with moderate to fresh southerly winds and seas generally 3-4 ft. Rain chances will remain very low through early next week.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 94 76 95 77 / 10 0 0 0 Houston (IAH) 93 78 94 78 / 10 0 0 0 Galveston (GLS) 89 83 89 83 / 10 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Should Exercise Caution through this evening for GMZ330-335-350-355-370-375.