textproduct: Houston/Galveston

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

KEY MESSAGES

- Scorching hot weather, especially Sunday throughout the upcoming work week. Heat Advisories Likely.

- Highs in the 90s/triple digits and heat index values of 104-112.

DISCUSSION

Issued at 1151 AM CDT Fri Jul 24 2026

After a prolonged period of active weather, Southeast Texas is slated to finally have a fair stretch of calmer weather as a 592-600 dam ridge settles in over the Four Corners/Southern Plains region. Isolated showers (maybe a storm or two at most), will still be possible this afternoon, decreasing and becoming more sparse in nature on Saturday and onwards. Nature's blowtorch kicks into full force from Sunday throughout the upcoming work week as 850mb temperatures climb to around 19-25C. This should result in high temperatures in the 90s to triple digits, with the warmest conditions currently anticipated around Thursday. Daily heat index values could reach 104-112 during the afternoon hours (higher in locally warm spots like asphalt/synthetic turf/etc). Overnight lows will not offer much relief with early morning temperatures in the mid 70s/lower 80s. Heat stress on the human body (based on WBGT) will peak at Extreme levels each afternoon for many spots. Heat advisories are likely to be needed for at least some duration during this period, thus heat safety should be practiced closely.

AVIATION

(12Z TAF Issuance) Issued at 526 AM CDT Fri Jul 24 2026

GOES PW imagery shows some drier air beginning to move into the region from the ESE, though with values still in the 1.7-2.0" territory, one cannot rule out some isolated showers today. That said, they should be short-lived at any individual site with little impact...so these chances won't be mentioned in the TAFS. Otherwise, some sporadic MVFR cigs should lift into VFR territory areawide by 15-16z. Southerly winds 10-15kt should diminish after sunset. SREF indicates some patchy fog potential west and north of the metro area late tonight/early Sat morning. 47

MARINE

Issued at 1151 AM CDT Fri Jul 24 2026

Light to moderate south/southwest winds and seas of 2-4 feet are expected throughout the next several days.

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 75 94 74 96 / 0 10 0 0 Houston (IAH) 77 95 76 98 / 0 10 0 10 Galveston (GLS) 83 91 82 92 / 0 10 10 0

HGX WATCHES/WARNINGS/ADVISORIES

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

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