Flooding
Brownsville breaks daily rain record; South Texas flood risk lingers into early Tuesday
By Ryan Hall, Y'all Weather Desk ยท Published
Written by our automated news desk from National Weather Service data.
Key points
- Where: South Texas, with a lower-end risk extending northwest along I-10 into the Hill Country.
- What happened: Brownsville set a daily rainfall record on November 6.
- Now through early Tuesday: A Level 2 of 4 (Slight Risk) for flash flooding is still up over parts of Texas through early Tuesday morning.
- Tuesday: No flash flood risk is outlined anywhere in the country.
An official report confirms Brownsville set a daily rainfall record on November 6. The heaviest rain is easing this evening, but the ground is soaked, so isolated flash flooding remains possible before the outlined risk ends early Tuesday.
What the records say
The confirmed record is Brownsville's. It picked up 1.86 inches of rain on Friday, November 6. The old mark for that date was 1.30 inches, set in 1899.
The official report confirms Brownsville's daily record in this run of rain.
Brownsville's wettest November on record is 7.69 inches, set in 1986, and its wettest November day is 4.08 inches, on November 11, 1986. Those are Brownsville's standing monthly and single-day November benchmarks.
Why flooding is still possible tonight
The ground is the problem. Soil moisture across the region is in the top few percent of what it normally holds. Rain that would soak in on a normal day runs off instead, and creeks and low spots fill faster.
Storms kept firing across south-central and southern Texas through the morning, with pockets of heavy rain. A surface trough over South Texas kept pulling in new rounds from Mexico. That pattern is easing, and the storm fuel is draining away this evening. The heaviest rain should keep tapering through the evening.
Any leftover downpour over wet ground can still cause trouble. Because of that, the flash flood outlook keeps the Level 2 of 4 risk going into early Tuesday morning. The outlook also stretches a lower-end risk northwest along I-10 into the Hill Country.
Along the coast, a Coastal Flood Advisory covers coastal portions of Aransas, Kleberg, Nueces, San Patricio, Refugio and Calhoun counties, including the Corpus Christi area, until 3 AM CST Tuesday. It calls for minor flooding.
What to do
- Don't drive through water over the road tonight, especially on farm roads and low crossings around the Rio Grande Valley and south of San Antonio. Water that looks shallow can hide a washed-out road.
- If you drive the coast near Corpus Christi, expect some minor water in low spots near the shore through early Tuesday.
- Check the Tuesday morning commute. Wet ground can leave standing water on roads even after the rain stops.
- Keep active warnings handy tonight, and sign up for free Y'all Alerts if you want a heads-up on your phone.
How sure are we
Tuesday's flash flood outlook looks quiet. No flash flood risk is outlined for the day, and the odds of rain topping flash flood guidance are under 5 percent. Tonight is the less certain part. Heavy rain is fading, but a stray cell over saturated ground can still cause a quick problem.
Brownsville's record is the only one confirmed in the available data.
Bottom line
Brownsville set a daily rainfall record on November 6. Watch for high water tonight, then expect the outlined flash flood risk to end early Tuesday.
Explained: What the flash flood risk levels mean, from Level 1 to Level 4
More on South Texas flooding, November 2026
Places in this story: McAllen, TX; Laredo, TX; Brownsville, TX; San Antonio, TX; Corpus Christi, TX
Sources
- WPC Excessive Rainfall Outlooks Days 2-3, 20Z Nov 7, 2026, NOAA Weather Prediction Center, issued
- NWS Brownsville RER 2:35 AM ET Nov 7, 2026, National Weather Service
- NOAA RCC ACIS, NOAA Regional Climate Centers (ACIS)