textproduct: Houston/Galveston

KEY MESSAGES

- Heat Advisory remains in effect. Hot conditions will persist through next week. - Scattered storms are possible late this afternoon and this evening across the Piney Woods region. Gusty winds are possible in the stronger cells.

- Cannot rule out some isolated showers/storms on Saturday, but most of us will likely remain dry and hot.

DISCUSSION

Issued at 1243 PM CDT Fri Aug 21 2026

Satellite imagery shows some weak shortwaves over SE OK sagging southward early this afternoon. With temps climbing to around 100F in advance, guidance still indicates the potential for scattered storm development late in the day and this evening up around the Piney Woods area that we'll need to keep an eye on. Any stronger cells will have the capability producing some 25-50mph wind gusts. Vast majority of models keep this precip across NE parts of our CWA before dissipating later tonight, however it's certainly not unheard of that these storms tend to overperform in these patterns so I plan to maintain the mention of at least lowish POPs much further south and east until trends can be established.

Another set of weak disturbances is fcst to take a similar track down the periphery of the ridge late in the day Saturday & Saturday evening...so am keeping some lower end rain chances in the fcst.

Otherwise, ridging & heat will continue to be the primary wx story well into next week. Highs in the triple digits are anticipated thru much of the work week. In terms of the Heat Advisory, I'm going to leave it as-is thru Saturday for now and let future shifts reevaluate things on a day-to-day basis in terms of any extensions or potential reconfigurations. 47

AVIATION

(18Z TAF Issuance) Issued at 1243 PM CDT Fri Aug 21 2026

VFR conditions and southwesterly to southerly winds will persist through the afternoon hours today. Wind speeds will increase to near 10-15 kt closer to the coast this afternoon following the sea breeze. Late this afternoon into the evening, will need to monitor the potential for convection drifting into the area from the northeast. UTS has the "best" potential for seeing isolated convection, but the probability is on the low side. The PROB30 reflects the most likely timeframe for convective impacts. Elsewhere, conditions are expected to remain dry. Keeping the trend of persistence for the overnight portion of the TAFs which hints at MVFR/IFR CIGs/VIS for CXO and terminals northward in addition to LBX. VFR conditions will return by 15Z/Saturday with light winds out of the southwest.

Batiste/Lenoir

MARINE

Issued at 1243 PM CDT Fri Aug 21 2026

Thunderstorms are expected north and east of the region this evening. These storms are not anticipated to make it into our waters, but are worth watching. Otherwise, light to occasionally moderate southwest and south winds and 2 to 3 foot seas are expected over the next several days. Winds may occasionally gust up to 20 knots during the afternoon in the bays, and during the overnight hours in the Gulf. 47

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 78 103 78 102 / 20 20 20 10 Houston (IAH) 81 102 80 101 / 20 20 20 10 Galveston (GLS) 83 92 83 92 / 10 10 10 10

HGX WATCHES/WARNINGS/ADVISORIES

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

GM...None.