


Area Forecast Discussion
Issued by NWS Brownsville, TX
Issued by NWS Brownsville, TX
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715 FXUS64 KBRO 160012 AFDBRO Area Forecast Discussion National Weather Service Brownsville TX 712 PM CDT Tue Jul 15 2025 ...New DISCUSSION, MARINE... .KEY MESSAGES... Updated at 710 PM CDT Tue Jul 15 2025 * Hot, humid, rain-free, and at times breezy conditions are expected to persist through the middle parts of next week. * Minor (Level 1 of 4) Heat Risk will persist through Friday, before Moderate (Level 2 of 4) Heat Risk develops over the weekend. * Breezy southeasterly winds at times will result in low to moderate seas through the forecast period. && .DISCUSSION... Issued at 710 PM CDT Tue Jul 15 2025 The weather pattern through at least the middle parts of next week for Deep South Texas and the Rio Grande Valley will feature continued hot, humid, rain-free, and at times breezy conditions. Global forecast models and ensembles continue to advertise a 591-594 dam sub-tropical heat ridge or "heat dome" retrograding westward from Bermuda and building over the southeastern U.S. initially before eventually establishing itself more broadly over the Southern U.S. For Deep South Texas and the Rio Grande Valley, this means seasonable temperatures and mainly minor (Level 1 of 4) Heat Risk with pockets of moderate (Level 2 of 4) Heat Risk through Friday (highs temps inland in the mid 90s east to lower 100s west with heat indices between 100-110F). High temps will hold in the 80s along the Lower Texas Coast beaches and South Padre Island. The heat intensifies slightly over the weekend as the aforementioned 594 dam sub-tropical heat dome builds overhead. This will result in mainly moderate (Level 2 of 4) Heat Risk developing over Deep South Texas and the Rio Grande Valley over the weekend and persisting through early next week. Temperature anomalies will run slightly hotter than normal with triple digit heating becoming more common along and west of IH-69C. As highlighted earlier, rain-free conditions will prevail through the middle parts of next week as the aforementioned heat ridge stifles any prospects rain. It`s possible that this pattern of normal to hotter than normal temperatures and mainly dry conditions could continue through late July/early August, given the time of year we`re in and model trends. Winds will also be breezy at times through the forecast period as the sfc pressure gradient tightens or enhances at times. This could at times result in moderate seas and rip current risk through the period. Finally, we continue to monitor a disturbance that has a medium (40%) chance of development over the next 2-7 days over the north- central Gulf. Impacts are not expected at this time across Deep South Texas, according to forecast trends. However, there could be some increase in swells over the Gulf Waters later this week. && .AVIATION... (00Z TAFS) Issued at 531 PM CDT Tue Jul 15 2025 Through 00z Thursday....Flying conditions, by and large, will be VFR through the 00z TAF period with just a FEW-SCT diurnally-driven clouds. Winds will remain breezy out of the southeast through much of the period with sustained speeds between 10-15 kts and gusts between 20- 30 kts. && .MARINE... Issued at 710 PM CDT Tue Jul 15 2025 Moderate southeasterly winds and low to moderate seas are expected to prevail through the forecast period. The National Hurricane Center (NHC) is monitoring a disturbance that has a medium (40%) chance for development across the north-central Gulf that may increase swell locally late this week. Small Craft Exercise Caution (SCEC) conditions are possible each afternoon across the bay with gusty afternoon winds. && .PRELIMINARY POINT TEMPS/POPS... BROWNSVILLE 79 94 77 93 / 0 0 0 0 HARLINGEN 77 97 74 95 / 0 0 0 0 MCALLEN 79 99 77 98 / 0 0 0 0 RIO GRANDE CITY 76 101 74 98 / 10 0 0 0 SOUTH PADRE ISLAND 80 87 79 87 / 0 0 0 0 BAYVIEW/PORT ISABEL 78 93 76 92 / 0 0 0 0 && .BRO WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && $$ SHORT TERM...23-Evbuoma LONG TERM....23-Evbuoma AVIATION...23-Evbuoma