textproduct: Houston/Galveston

KEY MESSAGES

- Increasing heat risk with "feels-like" temperatures around 97-107 degrees (36-42 Celsius).

- Risk of Rip currents across Gulf-facing beaches throughout the week.

- Isolated/scattered showers and thunderstorm chances daily, mostly during the afternoon hours. Chances will increase Sunday into next week.

DISCUSSION

Issued at 1101 PM CDT Tue Jun 9 2026

Subtropical ridging is anticipated to keep warn, humid weather in place throughout the remainder of the week. Onshore winds should remain firmly remain in place due to a Bermuda high off the eastern sea board. Midlevel heights are forecast to be around 590-593 dam, above the 90th climatological percentile for this time of the year. NAEFS has indicated that 200mb mean geopotential heights will also be strongest around the weekend. Subsidence should largely inhibit storm development, though ample PWs of 1.4-2.3 inches and modest afternoon heating should still allow for isolated daily showers, especially during the afternoon along the sea breeze, with a thunderstorm or two as well. Highs are forecasted to reach the upper 80s to mid 90s (31-36 Celsius) with lows in the 70s to lower 80s (21-27 Celsius). Even with mixing, afternoon dewpoints are still anticipated to remain in the 70s (20-26 Celsius) each day, resulting in very humid weather. Max heat indicies are forecasted to reach 97-107 degrees (36-42 Celsius) during the afternoon. WBGT Heat stress is forecasted to be high with each day as well. Sensitive groups or those not acclimated to the summer like weather of Houston will be at a greater risk of experiencing heat illness. Cannot rule out the potential for heat advisories, especially this weekend. If you plan to spend time outdoors, make sure to drink plenty of water to stay hydrated. If you plan on heading to the beach to beat this heat, make sure to watch out for rip currents!

We should see the weather pattern change heading into next week, as a mid/upper level trough digs into the Plains. This feature should shove the subtropical ridge further south, lowering heights over SE Texas. In addition, this feature is also progged to push a cold front towards SE Texas. Model guidance has this cold front reaching the Brazos Valley early Tuesday morning. Scattered showers/storms will be possible as the front pushes southward towards the coast. As we head deeper into summer, the possibility of fronts reaching/pushing through SE Texas generally declines, thus there is still potential to see some changes in the fronts positioning these next several days. Regardless, declining temperatures/heat stress and rising rain chances are anticipated for the first half of next week.

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AVIATION

(00Z TAF Issuance) Issued at 557 PM CDT Tue Jun 9 2026

VFR conditions currently across all SE TX this evening along with SE winds at around 10 KTS with a few seeing higher gusts between 15-20 KTS. For tonight, winds will gradually relax to around 5 KTS and MVFR cigs are expected to develop and continue through early Wed. Some sites could once again see patchy fog during the overnight to early morning hours, burning off shortly after sunrise. Cigs will gradually lift after 15Z and winds will strengthen to 08-12 KTS. We could see some streamer showers from the Gulf waters moving into areas near and south of I-10 during the morning, followed by iso-sct showers and iso thunderstorms during the afternoon hours. Chance for rain will decrease Wed evening. Winds will relax again Wed night.

Cotto

MARINE

Issued at 1101 PM CDT Tue Jun 9 2026

Light to occasionally moderate onshore winds are expected throughout the rest of the work week with seas of 2 to 5 feet. Caution flags may be warranted at times, especially this weekend as seas near 6 to 7 feet offshore. Isolated showers and thunderstorms will be possible each day with rain chances rising over the weekend into early next week. There will also be a moderate to high risk of rip currents across Gulf facing beaches through early next week.

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PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 92 76 91 76 / 10 10 20 10 Houston (IAH) 91 78 91 78 / 20 10 20 10 Galveston (GLS) 87 82 88 82 / 10 20 20 10

HGX WATCHES/WARNINGS/ADVISORIES

TX...None. GM...None.