textproduct: Houston/Galveston

KEY MESSAGES

- Hot and dry, with lower humidity Saturday.

- Humidity returns Sunday along with daily diurnal storm chances into next week.

DISCUSSION

Issued at 1128 PM CDT Fri Sep 18 2026

Mid/upper ridging overhead and deep dry air will result in a Saturday that is much like the Friday that fell before it. Afternoon temperatures should be hot (well into the 90s) with lower humidity (60s dew points inland). Certainly not Pumpkin Spice weather. But also not as oppressive as recent weeks. Unfortunately this will not last, with high humidity and daily diurnally related isolated shower/thunderstorm chances returning Sunday. This pattern should hold through at least the middle portion of the upcoming week. Best chance of a shower and storm will be in our southern and coastal counties. Afternoon highs should remain well into the 90s.

Global guidance strongly suggest the development of a deep layer E CONUS trough. As you may expect, the implications of this trough would be more strongly felt by our friends back east. However, there may be a weak backdoor frontal boundary that brings another round of lower humidity, and perhaps slightly less hot temperatures, by the end of the week. A plurality of global ensembles even suggest the air mass will be a tad drier and a tad less hot than the current air mass. I wouldn't call it fall-like. But at least there are signs that we are very slowly heading in the right direction.

Self

AVIATION

(06Z TAF Issuance) Issued at 1128 PM CDT Fri Sep 18 2026

VFR conditions prevail at all TAF sites with light and VRB winds. Winds pick back up and settle out of the ESE tomorrow afternoon. KCXO has a chance for patchy fog early tomorrow morning, which should clear out shortly after sunrise. Precipitation chances remain very minimal tomorrow. KGLS may see a few short lived showers in the morning/early afternoon. Otherwise, VFR conditions are expected thru the TAF period.

MLG

MARINE

Issued at 1128 PM CDT Fri Sep 18 2026

Light to moderate east to southeast winds and 2-4 foot Gulf seas are expected through mid-week. Easterly winds may increase somewhat later in the result, resulting in a corresponding yet modest increase in the seas. There will be a daily risk of isolated showers and thunderstorms for much of the upcoming week.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 98 72 96 74 / 0 0 0 10 Houston (IAH) 95 74 94 75 / 0 0 0 10 Galveston (GLS) 90 82 91 82 / 0 0 0 20

HGX WATCHES/WARNINGS/ADVISORIES

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