textproduct: Houston/Galveston

KEY MESSAGES

- Heat Advisory remains in effect. - Cannot rule out an isolated shower or thunderstorm at times into midweek, but chances will be quite low for most of the area. - Temperatures slightly ease late in the week along with the potential for some rain chances returning to the forecast.

DISCUSSION

Issued at 1249 PM CDT Sun Aug 23 2026

Temperatures are currently running 2-5 degrees lower than yesterday at this time thanks to the debris cloudiness passing overhead. Satellite pix show the sun re-emerging so we still have plenty of time to get some of those readings back close to 100F. Like previous days, cannot rule out an isolated storm or two late in the day/evening. Consider yourself lucky if one passes overhead as most of us will remain dry.

If you've enjoyed the wx for the past several days, you're in for a treat because more of the same is anticipated thru at least midweek. Will maintain the ongoing Heat Advisories in place.

Later in the week (Thursday and beyond), the western mid-upper ridge moves a bit further to the west which will allow for falling heights locally and a gradual easing of the 100F+ temps. It appears that llvl ridging in the Gulf will also lose some of its grip. A more prevalent SSE flow emerges (versus the current SW) and opens up a better trajectory for some higher PW Gulf air to flow inland. Combination of this, less potent subsidence aloft, and some west-to-east mid level impulses should allow for the mention of some POPs to return to the fcst. Suspect we'll see rain chances trend higher than we currently have in our fcst assuming the wetter 12z deterministic model suites show some consistency as time marches on. 47

AVIATION

(18Z TAF Issuance) Issued at 1249 PM CDT Sun Aug 23 2026

VFR conditions prevail alongside southwesterly winds around 5-10 kt. Winds will transition to southeasterly later this afternoon. High- resolution model guidance depicts isolated convection developing around 21Z in portions of the Piney Woods and drifting southwestward. As of right now, a PROB30 has been included only at UTS, but CXO may also need SH/TS mentions should a similar setup to Saturday afternoon unfold. Confidence remains rather low on any convective development, but if anything manages to develop then UTS/CXO would be the most likely to see convective impacts. Winds transition back to light and southwesterly overnight. As seen over the past few mornings, a brief period of isolated low ceilings will be possible around and shortly after sunrise. Areawide VFR conditions will return by 15Z/Monday.

Batiste

MARINE

Issued at 1249 PM CDT Sun Aug 23 2026

Southwest to west winds late at night and in the mornings will become south 10 to 15 knots during the day as the seabreeze kicks in. Seas will be 1 to 3 feet. A more prevailing southeast to southeast flow should set back up late in the week and weekend along with the return of some isolated to scattered rain chances. 47

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 78 103 77 102 / 20 0 0 10 Houston (IAH) 80 101 79 101 / 20 10 10 10 Galveston (GLS) 83 93 84 92 / 10 0 0 10

HGX WATCHES/WARNINGS/ADVISORIES

TX...Heat Advisory until 7 PM CDT Monday for TXZ163-164-176>179- 195>200-210>214-226-227-235>238-300-313-335>338-436>439.

GM...None.