textproduct: Houston/Galveston

KEY MESSAGES

- Scattered afternoon showers and thunderstorms will be possible on a daily basis into next week.

-Heat and humidity continue with heat indicies in the triple digits each day

DISCUSSION

Issued at 1234 AM CDT Fri Sep 4 2026

Upper level ridging will expand across the Southern Plains with a mid-level circulation meandering SW through the day Friday. PWAT values remain elevated, and as daytime heating kicks in with the approach of the sea breeze, expect to see more showers and thunderstorms developing over the course of the day. Nearby mid- level vorticity maximum, along with moderate instability and weak winds, will promote slow moving storms capable of producing heavy downpours and isolated gusty winds through the afternoon hours.

Expect this pattern of daily showers and storms to continue through the long-term period as a broad area of low pressure remains nearby and the ridge just to our north. This area of low pressure coupled with daytime heating and the afternoon sea breeze will promote afternoon showers and storms.

Look for highs to be in the low to mid 90s for inland areas and in the 80s along the coast. Daytime heat indices will reach into the triple digits.

Bailey

AVIATION

(06Z TAF Issuance) Issued at 1234 AM CDT Fri Sep 4 2026

Fairly tranquil night on tap with light winds and bkn-ovc mid/upper cloud cover. May see some intermittent spotty showers overnight, but only terminal probably worth mentioning would be CLL at this point.

Otherwise, continued VFR with light winds during the day. Am anticipating fairly active seabreeze/baybreeze shra & tstm development after about 16z. Kind of a mixed model bag in terms of how far north precipitation spreads inland. Have some PROB30s up to about UTS for now until we see how trends evolve. Suspect they might need to be increased up into the metro area and possibly removed at some locations further north. With the light flow, I'd anticipate some boundary interactions/collisions that may briefly enhance storm strength at times, but that's too small of a scale for TAFs at this point. Precip should taper off late in the day/evening with the loss of heating. 47

MARINE

Issued at 1234 AM CDT Fri Sep 4 2026

Light to moderate onshore winds and 2-3 ft seas will prevail through the end of the week and into the weekend. Isolated to scattered showers and thunderstorms are expected each day. Locally higher winds and seas will be possible near any strong storms.

JM/Bailey

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 74 94 74 95 / 10 20 10 20 Houston (IAH) 77 93 77 94 / 10 50 10 50 Galveston (GLS) 82 90 82 90 / 40 40 40 40

HGX WATCHES/WARNINGS/ADVISORIES

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