textproduct: Houston/Galveston

KEY MESSAGES

- Chances of showers and thunderstorms will remain in the forecast for the next several days...highest at the coast, slightly lower well inland.

- Precipitation should be diurnally driven...starting out offshore and near the coast late at night and in the mornings then transitioning inland during the day. - High temperatures will generally be in the low to mid 90s inland and the upper 80s to lower 90s along the coast.

DISCUSSION

Issued at 1221 AM CDT Wed Sep 9 2026

Elongated, flat mid level ridge currently stretches from the Desert Southwest eastward across the Carolinas. An inverted trof across the western Gulf, along with some troffiness moving across the ncntl U.S. should carve out a general weakness and split the ridge (to our east/west). This weakness should mostly persist into the weekend, and with a touch less subsidence to overcome, allow for chances of scattered showers/thunderstorms on a daily basis. With lack of significant forcing other than the seabreeze/baybreeze, these will mostly be diurnally driven with highest coverage late at night and mornings offshore transitioning inland during the day after some heating. PW's of 2.0-2.2" across the southern half of the area would suggest the probabilities of the higher coverage being situated there moreso than in the Brazos Valley & Piney Woods.

The eastern portion of the ridge looks to regain its strength and gradually expand back into the region early-mid next week...not eliminating rain chances - but allowing subsidence to put up more of a fight. 47

AVIATION

(12Z TAF Issuance) Issued at 547 AM CDT Wed Sep 9 2026

Isolated to scattered showers have been present offshore and along the coast near LBX/GLS for most of the early morning hours. This sporadic coverage of coastal showers will continue through the morning, then will be followed by increasing coverage of showers/storms by the late morning into the afternoon with daytime heating and the seabreeze moving inland. There remains a little bit of uncertainty in the inland extent of the afternoon convection, but the general timing of 18Z-00Z remains consistent with what we have seen over the past few days. The southern terminals are on the earlier end of that window and vice versa. The highest confidence for convective impacts is generally near and south of the I-10 corridor. Outside of any storms, VFR conditions will prevail throughout the day with light easterly winds in the morning becoming southeasterly in the afternoon between 7-10 kt. Convection subsides after sunset and will be accompanied by a trend towards light and variable winds going into the overnight hours. A rinse and repeat pattern for Thursday, so anticipate another round of early morning showers again along the coast.

Batiste

MARINE

Issued at 1221 AM CDT Wed Sep 9 2026

Light onshore flow and low seas will prevail for the next several days, perhaps increasing a touch by the end of the work week as the pressure gradient slightly tightens. The main concern for mariners will be dodging the late night and morning scattered showers and thunderstorms. We had some reports of funnels/waterspouts the past day or two. Environment today is similar, with a light flow regime in place so we wouln't be overly surprised to see a few more reports of these. (Not abnormal in these environments, typically short-lived, and occur in the early and mid morning hours). 47

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 96 75 96 75 / 20 20 20 20 Houston (IAH) 92 78 93 77 / 40 20 40 30 Galveston (GLS) 91 82 90 81 / 60 30 50 40

HGX WATCHES/WARNINGS/ADVISORIES

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