textproduct: Corpus Christi

KEY MESSAGES

Updated at 633 PM CDT Thu Jun 4 2026

- Daily chances of rain leading to a quick downpour with strongest storms bringing rainfall in excess of 2-3 inches

- Rip current risk increasing this weekend along with increased chances of minor coastal flooding Friday/Saturday at high tide

- More widespread Moderate HeatRisk (level 2 of 4) beginning Sunday

DISCUSSION

Issued at 113 PM CDT Thu Jun 4 2026

A cutoff low over the Baja Peninsula has begun shifting the subtropical jet stream toward northern Mexico and along the Rio Grande, increasing rain chances through the weekend. Gulf moisture will continue to stream into the area, with PWAT values of 2+ inches through Sunday. Most of the showers and storms will be initiated by the seabreeze, but multiple outflow boundaries across the area will help drive the storm motions. This means individual storm motion may seem unusual. Heavy rainfall will continue with some of the showers and storms, with 1-2 inches of rain common and up to 3 inches possible in the strongest or slowest-moving showers and storms. We are a little excited to point out that we have saturated soils, but this does mean that flash flooding is more likely in streams and creeks, in addition to urban areas. WPC has maintained a Marginal Risk of excessive rainfall (level 1 of 4) across portions of South Texas through Saturday. Rain chances will diminish Sunday, with mostly low (10-25%) chances of seabreeze convection through the upcoming week.

Temperatures will climb back into the 90s, with relative humidity values remaining above 50% in the afternoons. This will lead to heat index values in the 105-110 range by the middle of the week. There is a widespread moderate heat risk (level 2 of 4) from Sunday through the latter part of the week.

Increasing swell period through this weekend and persistent easterly winds will lead to a moderate rip current risk tonight, with a high risk of rip currents expected Friday. Higher swell periods (8-9 seconds), could also lead to minor coastal flooding during the times of high tide. High tides will fall during the mid-late morning this weekend allowing for optimal time to monitor beach cams prior to considering the issuance of a Coastal Flood Advisory.

AVIATION

(00Z TAFS) Issued at 633 PM CDT Thu Jun 4 2026

This evening's main area of precipitation is along the Rio Grande where afternoon storms have popped up. Under the vicinity of a storm reductions to MVFR can be expected. In the absence of precipitation, CIGs will bring a mix of MVFR/VFR across the region. Coastal isolated showers after 06Z has prompted PROB30 groups. Some hi-res models show hints of a merging of storms W of KLRD and moving eastward into the Brush Country between 10-14Z, though confidence in this merged convection and timing is low. SE winds pick up to 10-15 kt by Friday afternoon.

MARINE

Issued at 113 PM CDT Thu Jun 4 2026

Light to moderate (BF 2-4) easterly flow will turn southeasterly tonight through Friday, then increase to gentle to moderate (BF 3-4) flow, with periods of fresh (BF 5) breezes early next week. Seas of 2-3 feet will increase to 3-5 feet through Monday. Daily chances for showers closer to the coastline (20-40%) will lead to enhanced sea conditions in the strongest storms.

PRELIMINARY POINT TEMPS/POPS

Corpus Christi 76 87 76 88 / 20 30 20 40 Victoria 73 87 75 87 / 10 40 30 60 Laredo 75 87 73 92 / 40 50 40 10 Alice 74 88 74 88 / 20 50 30 30 Rockport 78 87 79 89 / 20 20 30 30 Cotulla 75 86 73 91 / 40 50 60 10 Kingsville 75 88 75 87 / 20 40 30 30 Navy Corpus 79 85 79 88 / 20 20 30 30

CRP WATCHES/WARNINGS/ADVISORIES

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