textproduct: Brownsville/Rio Grande Valley

KEY MESSAGES

Updated at 634 AM CDT Mon Jun 22 2026 - Dry conditions, breezy at times, and seasonably hot temperatures prevail across deep south Texas through this upcoming weekend.

- Moderate to major heat risks (levels 2 and 3 of 4) on Monday and a moderate heat risk on Tuesday become minor (level 1 of 4) to moderate Wednesday and Thursday, followed by moderate heat risks over the weekend.

- A Special Weather Statement (SPS) has been issued for the Monday afternoon and early evening hours across the coastal and inland portions (excluding the barrier islands) of Cameron, Willacy and Kenedy counties as well as Northern/Southern Hidalgo and Starr counties for heat indices of 108 to 111 F.

- A medium risk of life-threatening rip currents continues through Monday afternoon.

- Adverse marine conditions linger into Monday, improving Monday night into Tuesday before deteriorating again over the weekend.

DISCUSSION

Issued at 1042 PM CDT Sun Jun 21 2026

A building high pressure aloft (peaking as high as 597+ dam on Tuesday), stretching from the Desert Southwest to the Gulf, followed by the lack of any significant approaching troughs leaves deep south Texas with seasonably hot and dry conditions through this upcoming weekend; highs continue to maximize in the mid/upper 90s in the afternoon and mainly upper 70s overnight, aside from lower 80s in southeastern Cameron and along the Gulf coast. A tightened pressure gradient leads to breezy onshore southeasterly winds on Monday (gusting to around 25-35 mph) and Tuesday (gusting to near 20-30 mph); the combination of hot temperatures and elevated lower-level moisture content is likely to lead to mostly moderate heat risks, with pockets of major across the coastal counties on Monday, through Tuesday. A SPS has been issued for the Monday afternoon and early evening hours across the coastal and inland portions (excluding the barrier islands) of Cameron, Willacy and Kenedy counties as well as Northern/Southern Hidalgo and Starr counties for heat indices of 108 to 111 F, generally between 12 PM to 7 PM Monday. A few locations may briefly experience heat index values above 111 F degrees. If spending time outside today, drink plenty of water, wear light weight and light colored clothing, and take frequent breaks from the heat. Young children and pets should never be left unattended in vehicles.

Following, winds ease just a bit into the middle and later parts of the week, reducing heat indices to 100-108 F Wednesday and Thursday, resulting in minor heat risks across the Northern Ranchlands and moderate heat risks across the RGV. Increasing southeasterly winds enhance moisture content and escalate apparent temperatures to near 105 to 110 F with moderate heat heat risks over the weekend.

A moderate risk of life-threatening rip currents continues through Monday afternoon.

AVIATION

(12Z TAFS) Issued at 634 AM CDT Mon Jun 22 2026

Light to moderate southeast to south winds and a mix of VFR/MVFR ceilings prevail across Deep South Texas early this morning. A few periods of MVFR ceilings will be possible through around 14Z, especially at MFE/HRL. Otherwise, VFR conditions are forecast for the next 24 hours. Southeast winds are forecast to increase and become breezy mid to late morning. Some gusts near 30 knots will be possible later this morning into the afternoon. MVFR ceilings may return late in the period.

MARINE

Issued at 1042 PM CDT Sun Jun 21 2026

A Small Craft Advisory (SCEC) remains in effect until 1 PM Monday afternoon as mostly strong south-southeasterly winds and moderate (5- 7 feet) seas persist. Winds ease to moderate to fresh and out of the southeast by Monday evening, with Small Craft Exercise Caution (SCEC) possible through Monday night. Mainly moderate southeasterly winds and moderate seas (3-5 feet) resume Tuesday before enhancing enhance again over the weekend, with SCEC and/or SCA possible. Dry conditions maintain as well.

PRELIMINARY POINT TEMPS/POPS

BROWNSVILLE 94 82 93 80 / 0 0 0 0 HARLINGEN 94 79 94 77 / 0 0 0 0 MCALLEN 96 80 95 79 / 0 0 0 0 RIO GRANDE CITY 98 79 96 77 / 0 0 0 0 SOUTH PADRE ISLAND 89 82 88 82 / 0 0 10 0 BAYVIEW/PORT ISABEL 92 81 91 79 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES

TX...None. GM...Small Craft Advisory until 1 PM CDT this afternoon for GMZ130- 132-135-150-155-170-175.