textproduct: Houston/Galveston

KEY MESSAGES

- Hot and dry, with lower humidity through Saturday.

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

DISCUSSION

Issued at 1128 PM CDT Thu Sep 17 2026

The tropical PWAT plume and subtle sfc boundary that enhanced scattered showers and thunderstorms in our southern and coastal counties on Thursday will push well to our west on Friday. Meanwhile, much drier conditions are approaching our region from the east. Unfortunately, this 'new' air mass will not bring much cooler temperatures. But humidity on Friday and Saturday should be lower, with afternoon dew points falling into the 60s for many inland locations. Inland afternoon highs should remain well into the 90s. But the drier air is likely to allow for somewhat cooler overnight temperatures, especially away from the coast and outside the urban heat island. A few locally cool spots could even drop into the upper 60s Friday night and again Saturday night. I guess we'll take what we can get. Despite the dry air, there may be a few stray showers over the Gulf and near the coast through Friday morning.

By Sunday and beyond, we find ourselves back in a humid and very hot pattern. We think there will be a daily risk of isolated to scattered showers and thunderstorms, especially in our southern and coastal zones. Other than persistent mid/upper ridging, there are no other significant synoptic forcings that are expected to influence the pattern. No fall weather anytime soon. Sorry y'all.

Self

AVIATION

(12Z TAF Issuance) Issued at 542 AM CDT Fri Sep 18 2026

Isolated patchy fog will be possible in spots early this morning. KCXO could see FLs of MVFR to IFR levels over the next hour or two. Otherwise VFR conditions will prevail through the TAF period with E-SE winds during the daytime becoming light and variable at night. A few isolated showers and storms cannot be ruled out around the Matagorda bay area and adjacent Gulf waters. Could see another round of patchy fog at KCXO Saturday morning.

03

MARINE

Issued at 1128 PM CDT Thu Sep 17 2026

Residual gusty winds and enhanced seas are expected to linger into Friday morning, especially offshore. Otherwise, we expected light to moderate onshore flow over the next several days. Friday and Saturday should be much drier, though we can't rule out a stray shower over the Gulf. Daily risk of isolated to scattered showers and thunderstorms returns Sunday or Monday.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 97 72 97 74 / 0 0 0 0 Houston (IAH) 94 73 95 75 / 0 0 0 0 Galveston (GLS) 90 82 92 83 / 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES

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