At 5:42 a.m. CST Sunday, Doppler radar indicated heavy rain from thunderstorms, and minor flooding was ongoing or expected in south-central Hidalgo County, including South McAllen. Showers and thunderstorms are expected to keep the Rio Grande Valley soggy through the day. Temperatures may reach 82 degrees before sliding into the upper 70s during the afternoon.
Rain Stays With McAllen Through Monday
Sunday carries a 90% chance of rain in McAllen. Showers and thunderstorms remain likely Sunday night, when temperatures dip to around 70 degrees, according to the National Weather Service Brownsville office.
Monday looks just as wet, with a 100% chance of rain and a high near 77 degrees. Heavier pockets are possible elsewhere in Deep South Texas.
Flooding Could Become A Problem In Low-Lying Areas
The broader Deep South Texas forecast calls for 1 to 3 inches of rain Sunday and an additional 1 to 3 inches Monday, with isolated totals of 4 to 5 inches possible primarily in western portions of the forecast area. A Flood Watch is posted through Monday morning for Zapata, Jim Hogg, Starr and Brooks counties, while a separate early-morning flood advisory covered south-central Hidalgo County, including parts of the McAllen area, according to the National Weather Service.
Drivers should use caution on flooded roads during heavier showers. Avoid flooded roadways and never drive through water whose depth is unclear.
Drier Weather Takes Over Later In The Week
Rain chances are 20% to 30% Tuesday through Thursday, with mostly cloudy skies Tuesday and a high near 77 degrees. A few showers or thunderstorms could linger Wednesday and Thursday, but Friday turns sunny near 78 degrees, followed by a Saturday high near 83 with a 40% chance of showers and thunderstorms.
The soaking forecast is a significant escalation from Saturday's outlook, which had already flagged a stormy Sunday for McAllen; the earlier forecast is detailed in Hoodline's previous update. For now, Sunday is a day to leave extra time for the commute and keep outdoor plans flexible.
