textproduct: Corpus Christi

KEY MESSAGES

Issued at 619 AM CDT Mon Aug 17 2026

- Moderate to major risk of heat-related impacts through next week with peak afternoon heat indices around 110

- Monitoring daily elevated fire weather potential over the Brush Country

DISCUSSION

Issued at 1249 AM CDT Mon Aug 17 2026

The overall pattern remains largely unchanged through the period. The mid-level ridge will slowly retrograde westward, while slightly lower surface pressures and a modest decrease in 850 mb temperatures occur Monday. This should translate to slightly cooler surface temperatures and heat indices compared to recent days, though the decrease will not be sufficient to appreciably reduce the ongoing heat risk.

By Tuesday, 850 mb temperatures and surface temperatures rebound as South Texas remains beneath the influence of the broad ridge. Little meaningful day-to-day change is expected thereafter, with hot and generally rain-free conditions continuing through next weekend and into next Monday. Afternoon highs will generally range from the 90s across the Coastal Bend to around 100-105 degrees across portions of the Brush Country and Rio Grande Plains. Overnight lows will remain warm, generally in the mid 70s to lower 80s.

Peak heat indices will commonly range from around 105 to 110 degrees each afternoon. Moderate to major HeatRisk will therefore persist through much of the period, with continued emphasis on heat safety and limiting prolonged outdoor exposure during the hottest part of the day.

AVIATION

(12Z TAFS) Issued at 619 AM CDT Mon Aug 17 2026

Conditions between ALI and VCT have dropped to IFR and LIFR early this morning with more fog than anticipated. Expect continued low VIS/CIG for the next couple of hours before VFR conditions return by mid-morning. Other sites could briefing see MVFR conditions this morning as well. Expect a similar story tonight with periods of low flight category conditions especially at VCT and ALI.

MARINE

Issued at 1249 AM CDT Mon Aug 17 2026

Persistent onshore flow will remain gentle to moderate (BF 3- 4) most of the time, with occasional fresh flow (BF 5) possible during the afternoon and evening hours as the coastal pressure gradient strengthens. Seas should remain relatively steady with no significant marine hazards anticipated at this time. Rain chances will remain minimal through much of the upcoming week under the influence of a mid-level ridge.

FIRE WEATHER

Issued at 1249 AM CDT Mon Aug 17 2026

Elevated fire weather concerns will persist, primarily across the western Brush Country and Rio Grande Plains, as hot and dry conditions continue. Slightly cooler temperatures Monday may provide a modest reduction in afternoon drying, but temperatures and 850 mb thermal profiles rebound Tuesday and remain hot through the remainder of the period. Afternoon relative humidity will continue to fall to its lowest values across the western portions of South Texas, while persistent southeasterly winds may occasionally become breezy. Although widespread critical conditions are not anticipated, the combination of hot temperatures, dry fuels, and periodic stronger winds will maintain an elevated fire weather risk through much of the week.

PRELIMINARY POINT TEMPS/POPS

Corpus Christi 94 78 95 77 / 0 0 0 0 Victoria 100 76 99 75 / 10 0 10 0 Laredo 103 78 103 77 / 0 0 0 0 Alice 100 74 101 73 / 10 0 10 0 Rockport 92 81 92 81 / 0 0 0 0 Cotulla 103 77 103 76 / 0 0 0 0 Kingsville 97 76 98 75 / 10 0 10 0 Navy Corpus 90 81 90 81 / 0 0 0 0

CRP WATCHES/WARNINGS/ADVISORIES

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