textproduct: Houston/Galveston

KEY MESSAGES

- Isolated to widely scattered showers and storms are expected today, mainly focused over areas near and south of I-10.

- High temperatures will generally be in the low to mid 90s inland and the upper 80s to lower 90s along the coast through the end of the work week. Isolated spots west of I-45 could see highs in the upper 90s at times.

- Rain chances increase mid-week as tropical moisture returns to the area. Locally heavy rainfall with rainfall rates of 2-3" per hour is possible.

DISCUSSION

Issued at 121 PM CDT Tue Sep 8 2026

The southern periphery of a mid-level high pressure situated over Oklahoma and Kansas will be the dominant weather feature today and will help increase temperatures, peaking in the mid to upper 90s for most inland areas and the lower to mid 90s along the coast. Heat indices will be high today as well, ranging between 105-108 deg F for most of Southeast Texas, and some isolated spots may peaking at 109-110 deg F. Make sure to practice heat safety, especially if you plan to work or spend time outdoors for extended periods. Remember, if the ground is too hot for your hands, then it is likely too hot for their paws :).

Although the high pressure will help limit shower development, there is still enough low-level moisture and instability this afternoon for isolated to scattered showers and thunderstorms to form. Not much change seen in the low-level moisture amounts today and the GOES-19 Total Precipitable Water Imagery at noon showed 2.1-2.3 inches over most areas south of the Brazos Valley and Piney Woods region. Thus, we will likely continue to see some more showers and storms mostly near and south of I-10 for the rest of the afternoon with a few showers and storms possible north of I-10 if it can surpass the influence of the high pressure.

A more active weather pattern is expected on Wednesday as the high pressure shifts towards the California region while our local PWs continue to range between 2.1-2.3 inches over most of the area south of the Brazos Valley. Throughout the day, expect scattered to numerous showers and thunderstorms south of the Brazos Valley and Piney Woods region and isolated to widely scattered showers and thunderstorms northward. With the amount of low-lelve moisture in place, locally heavy rainfall with rainfall rates of 2-3" per hour is possible. This could lead to ponding of water along roadways and areas of poor drainage at times. Increasing cloud coverage and rain chances will help bring the high temperatures back into the lower to mid 90s range on Wednesday, mostly for areas with the higher chances of rain. The Brazos Valley may remain in the mid to upper 90s range. For the rest of the work week and upcoming weekend, daily isolated to scattered showers and thunderstorms are expected as disturbances move overhead while high pressure continues across the Southwest and Southeast CONUS. Cotto

AVIATION

(00Z TAF Issuance) Issued at 610 PM CDT Tue Sep 8 2026

Popcorn SH and TS continue to speckle the region and gradually decrease due to loss of day time heating as the evening hrs begin. Overnight winds, again, become lgt to near calm causing the chance for MVFR CIGs across the area. The n'rn terminals having TEMPO lines for BR during the pre-sunrise hrs. During the morning hrs the sea breeze initiating will keep SH across the coastal TAF sites before pushing inland. The showers will turn to thunderstorms as day time heating increases and lasts through the early evening hours. We will monitor the development tomorrow for the additions of TEMPO groups as timing and placement become more concise. Outside of TS/SH conditions prevail VFR with a ESE breeze.

CMW

MARINE

Issued at 121 PM CDT Tue Sep 8 2026

Light winds and seas of 2 feet or less are expected through the end of the work week. Winds become light to moderate and seas rise to 2-3 feet this upcoming weekend. Chance for showers and thunderstorms increase to 40-70% on Wednesday and Thursday, then range between 20-50% Friday into early next week. Locally heavy rainfall, frequent lightning, and strong winds of 20-30 knots will be the main hazards in and around stronger storms. Storms could also produce outflow boundaries that result in stronger variable wind gusts.

Cotto

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 76 96 75 95 / 20 20 0 10 Houston (IAH) 79 93 78 92 / 20 40 10 50 Galveston (GLS) 83 91 81 91 / 30 50 60 60

HGX WATCHES/WARNINGS/ADVISORIES

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