textproduct: Corpus Christi

KEY MESSAGES

Issued at 120 PM CDT Fri Aug 21 2026

- Heat Advisory remains in effect for the Coastal Plains through 8 PM this evening

- Major risk of heat-related impacts continue into next week with peak afternoon heat indices around 110

- Daily elevated fire weather conditions over the Brush Country

DISCUSSION

Issued at 120 PM CDT Fri Aug 21 2026

Moisture will remain below normal through at least Monday as a ridge meanders over the south to southwest CONUS, continuing hot and rain- free conditions across South Texas. Low-level moisture increases a tad beyond Monday of next week, adding an isolated shower threat along the seabreeze but the overall messaging won't change. Heat will remain our primary concern with heat indices peaking around 110 and UIL WBGT risk moderate to high daily. Max temperatures in the low 90s along the coast to the triple digits inland with minimum temperatures in the mid to upper 70s. Elevated fire weather conditions over the Brush Country is our secondary concern but winds remaining relatively light below 20 mph limits the risk factor.

Continue to practice heat safety: look before you lock, limit outdoor exposure, drink plenty of water, and take frequent breaks. For more safety information please visit weather.gov/heatsafety.

AVIATION

(18Z TAFS) Issued at 120 PM CDT Fri Aug 21 2026

VFR conditions prevail across South Texas this afternoon with limited cumulus development and more upper-level cirrus. Winds will be out of the south to southeast at a sustained 10-15 knots with gusts around 20 knots this afternoon into early evening. Winds diminish tonight, posing a fog and MVFR-ceiling threat over the inland Coastal Plains from ALI to VCT between 10-15Z. VFR conditions return by the end of the forecast with light winds.

MARINE

Issued at 120 PM CDT Fri Aug 21 2026

Light to moderate (BF 2-4) onshore breezes will continue through the period, with occasional fresh (BF 5) breezes possible during the late afternoon/evening hours, especially south of Port Aransas. Seas are expected to remain around 2-3 feet. Rain chances will remain near zero into next week.

FIRE WEATHER

Issued at 122 AM CDT Fri Aug 21 2026

The potential for elevated fire weather conditions over the Brush Country and portions of the western Coastal Plains are expected to continue into next week, with relative humidity values dropping into mid 20s each afternoon. With ERC values in the 75-89th percentile, low humidity, dry to critically dry fuels, and hot temperatures, a few locations across the Brush Country could even see critical fire weather conditions today into next week.

PRELIMINARY POINT TEMPS/POPS

Corpus Christi 76 97 76 96 / 0 0 0 0 Victoria 75 103 74 102 / 0 0 0 0 Laredo 78 106 78 105 / 0 0 0 0 Alice 74 104 73 103 / 0 0 0 0 Rockport 80 93 81 93 / 0 0 0 0 Cotulla 77 106 76 106 / 0 0 0 0 Kingsville 75 101 74 100 / 0 0 0 0 Navy Corpus 81 91 80 91 / 0 0 0 0

CRP WATCHES/WARNINGS/ADVISORIES

TX...Heat Advisory until 8 PM CDT this evening for TXZ230>234-241>247- 342>344-346-347.

GM...None.