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FLOOD WATCH in effect through Labor Day morning for San Antonio

San Antonio experiences heavy downpours with risk of flash floods

FORECAST HIGHLIGHTS

  • FLOOD WATCH: In effect through noon Monday — flooding possible Sunday evening into Labor Day
  • LABOR DAY: Morning storms possible with cooler highs
  • AMOUNTS: Expect additional totals of up to 2″
  • CONCERNS: Urban flooding, small stream rises, gusty winds up to 50 mph

FORECAST

Heavy rainfall has continued to push through San Antonio due to a stalled front. Radar indicates rainfall totals of 5″ fell Sunday evening.

Rainfall totals from Sunday Evening (Copyright KSAT-12 2025 - All Rights Reserved)

Good news though. This has continued to move through San Antonio north of the Hill Country and will continue drifting south toward the I-35 corridor this evening. There is still additional rainfall expected over the area through the next few hours allowing us to still be at risk of additional localized flooding.

Locally heavy rains and flooding is possible (Copyright KSAT-12 2025 - All Rights Reserved)

DON’T CANCEL PLANS

While flooding is possible in spots, it’s important to note that there will still be some folks that miss out on rain entirely. Keep your plans, but have an option ready to duck inside if you happen to get a storm.

Keep the KSAT Weather Authority handy. We’ll hop on the app and bring you live weather coverage as needed!

REMINDER: A Flood *WATCH* means we’re watching for the possibility of flooding. A Flood *WARNING* means flooding is happening and you should take action. If you get a warning, avoid driving over flooded roads and seek higher ground if necessary.

LABOR DAY

Less rain coverage Labor Day, but still a possibility for heavy downpours in the morning hours (Copyright 2025 by KSAT - All rights reserved.)

Scattered morning storms may linger into early Monday, with a 40% chance of rain. Temperatures will be cooler, with highs near 90°. Flooding remains a concern in areas that receive heavy rain overnight.

NEXT WEEK

Quiet, drier, and hotter for most of next week. However, rain returns to the forecast by next weekend.

7 Day Forecast (Copyright KSAT-12 2025 - All Rights Reserved)

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