textproduct: Corpus Christi

KEY MESSAGES

Updated at 615 AM CDT Fri Jun 19 2026

- Extreme Heat Warning in effect for South Texas and a Heat Advisory in effect for the Barrier Islands today until 8 PM.

- Heat Advisory Friday areawide.

- Moderate Rip Current Risk and minor coastal flooding possible Friday.

- Small Craft Advisory in effect for the south nearshores initially, then including the offshore this evening.

DISCUSSION

Issued at 120 AM CDT Fri Jun 19 2026

Heat continues to be the main concern today, although slightly cooler than Thursday, but still a moderate risk of heat related impacts. Highs will range from the upper 90s along the Rio Grande to around 90 along the coast. Dewpoints are progged to be in the mid 70s west to low 80s east this afternoon, leading to minimum relative humidity values ranging from 50% along the Rio Grande to 80% along the coast. The combination of the very humid conditions with the max temperatures will lead to dangerous heat indices of 110-115 across S TX today. A Heat Advisory is in effect from 11 AM to 8 PM. Saturday is expected to be slightly cooler due to an increase in rain chances.

Rain chances increase this afternoon across the Rio Grande Plains and Brush Country in response to an approaching mid level trough and increasing moisture. The trough is progged to strengthen into a cut- off low tonight, providing increased upper support for convective development. Moisture continues to deepen with PWATs increasing to 2.0-2.3 inches and the environment remains moderately unstable. Models indicate storms developing over Mexico with a couple of models showing an MCS developing and moving into the western portions of S TX this evening. The HRRR shows an outflow boundary developing over Central TX and moving southward with convection developing along the boundary, and merging with storms in Mexico as they move into the northwestern CWA this evening. Models are in fair agreement that the convection diminishes overnight as it moves east to southeast toward the Coastal Bend. The upper low is forecast to remain over northeast Mexico and the Rio Grande Plains through Saturday, providing upper support for additional showers and storms.

Given the high PWATs, and an efficient heavy rain processes, the Weather Prediction Center has placed a slight risk of excessive rainfall across the far northwest portions of the CWA for today. PWATs could increase to as high as 2.5 inches across S TX on Saturday and WPC has a marginal risk across all of S TX. The western CWA has not had as much rainfall as the eastern areas, thus the soils are not quite as saturated, but localized flooding will be possible.

Rain chances taper off Sunday as mid level high pressure over the gulf nudges westward and brings drier mid levels across S TX. Rain chances will be low to very low through early next week, but can not rule out a few showers along the sea breeze each afternoon.

The rip current risk will be moderate today through Saturday due to 8 second swell periods. Minor Coastal Flooding is not anticipated due to lower astronomical tides and a S-SE wind direction over the gulf waters.

AVIATION

(12Z TAFS) Issued at 615 AM CDT Fri Jun 19 2026

Mainly MVFR conditions this morning, though some sites have gone VFR at times. All sites should improve in the next couple of hours with VFR conditions through the afternoon. Several different model solutions on convection potential tonight, with the primary thinking at this time of the best chance being in COT and LRD. Have continued with mention of TSRA there and dry at other sites, but will have to watch this through the day. Expect MVFR CIGS developing for most sites again tonight.

MARINE

Issued at 120 AM CDT Fri Jun 19 2026

Moderate to fresh (BF 4-5) south to southeast winds can be expected today through the weekend and into early next week. Winds could be occasionally be strong (BF 6) across the southern Bays and Nearshore waters at times, particularly in the late afternoon.

FIRE WEATHER

Issued at 120 AM CDT Fri Jun 19 2026

Fire weather concerns will remain low through the period due to elevated relative humidity values and wet fuels. Rain chances are low today then increase tonight and Saturday, especially across the Rio Grande Plains and Brush Country. Rain chances diminish Sunday with low to very low chances through next week.

PRELIMINARY POINT TEMPS/POPS

Corpus Christi 92 81 90 81 / 10 30 30 30 Victoria 92 78 91 78 / 10 30 30 30 Laredo 99 78 95 78 / 30 60 40 30 Alice 94 79 91 78 / 20 30 40 20 Rockport 92 83 91 83 / 10 30 20 40 Cotulla 97 78 93 77 / 40 50 30 30 Kingsville 93 80 89 79 / 10 20 40 20 Navy Corpus 91 84 89 83 / 10 20 30 30

CRP WATCHES/WARNINGS/ADVISORIES

TX...Heat Advisory from 11 AM this morning to 8 PM CDT this evening for TXZ229>234-239>247-342>347-442-443-447.

GM...Small Craft Advisory until 7 AM CDT this morning for GMZ270-275.