textproduct: Houston/Galveston

KEY MESSAGES

- Seasonably hot conditions continue. Daytime highs will be in the 90s with heat indices in the triple digits.

- Scattered, diurnally driven thunderstorms are expected this afternoon and evening. Lower, but non-zero, rain chances Thursday.

- A deeper surge of Gulf moisture should arrive Thursday night and Friday. Warm, muggy conditions persist with daily chances of rain through the weekend into early next week.

DISCUSSION

Issued at 1252 AM CDT Wed Jul 8 2026

Mid level trof axis will remain stretched across SE TX today and Thursday. PW's around 2" closer to the coast should allow for some scattered seabreeze activity to develop as the day progresses. Slightly lower moisture availability Thursday should keep things a bit more isolated in nature. Daytime highs and heat indices will be about the same as they have been the past couple of days.

Thursday night into Friday, an inverted mid level trof in the Gulf will push wwd toward and into Mexico and south Tx. In the low levels, a tighter pressure gradient will transport some deeper tropical moisture into the region. PW values between 2.1-2.4" look to hang around through the weekend into early next week setting the stage for continued chances of mainly scattered, diurnally driven activity. Overall coverage will vary on a day-to-day basis with subtle fluctuations of moisture values, clouds, and heating. 47

AVIATION

(00Z TAF Issuance) Issued at 625 PM CDT Tue Jul 7 2026

Widely scattered showers and thunderstorms will persist across the area, especially north of I-10, through the early/mid evening hours. Maintained TEMPO groups at KUTS and KCXO through 01-02Z/8-9 PM CDT for the best potential of thunderstorms. By or just before 03Z/10 PM, precipitation should all be dissipated and VFR should prevail at all TAF sites. Patchy, light fog is anticipated to develop again near sunrise Wednesday, highest probabilities along and west of I-45. Once whatever fog that develops erodes and ceilings lift, VFR will prevail through much of the day. However, afternoon showers and thunderstorms are forecast to develop again along the seabreeze. Any heavy/strong shower or storm that moves over any terminals will cause visibilities to drop to IFR/MVFR levels. Added PROB30 groups for TSRA at most sites, generally between 18-00Z Thursday, though exact coverage and probabilities are still unknown at this time. Winds stay mostly light through the period, with light southwest surface winds in the morning veering more out of the south in the afternoon.

MARINE

Issued at 1252 AM CDT Wed Jul 8 2026

A remnant, diffuse outflow boundary from Tuesday night's storms could provide somewhat of a focus for isolated storm development early this morning in the Galveston Bay area. Otherwise, a more typical summertime pattern will persist into Thursday with the seabreeze the primary driver for iso-sct precip. Shower and storm chances increase late Thursday night and into the weekend as deeper moisture flows into the region. Best chances in the marine environment should generally be in the late night through early afternoon hours then transition inland. Onshore flow will prevail through the period. Speeds in the 10-15kt range today should slightly increase to closer to 15g20kt heading into Thursday and Friday along with a corresponding bump in the seas into the 3-4ft range. 47

PRELIMINARY POINT TEMPS/POPS

College Station (CLL) 96 76 96 76 / 10 20 0 10 Houston (IAH) 97 78 96 79 / 30 20 20 10 Galveston (GLS) 90 83 91 82 / 20 0 20 20

HGX WATCHES/WARNINGS/ADVISORIES

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