Rain Chances Rise as Storms Threaten Central Texas

Showers and thunderstorms expected in San Antonio through Tuesday

Apr. 19, 2026 at 10:10pm

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A sweeping, atmospheric landscape painting depicting dark, ominous storm clouds looming over the San Antonio skyline, conveying the overwhelming scale and power of the approaching weather system.As a powerful storm system moves into the San Antonio region, the city braces for heavy rainfall and potential disruptions to daily life and community events.San Antonio Today

The National Weather Service is reporting that rain chances in the South Central Texas area are increasing from Sunday night, April 19 into Monday, April 20. Scattered showers and thunderstorms are expected, with the possibility of higher rainfall amounts in thunderstorms. Rain chances will remain high through Tuesday, April 21 before decreasing heading into Wednesday.

Why it matters

Sudden storms and heavy rainfall can disrupt daily life, impact outdoor events and activities, and potentially cause flooding in the San Antonio area. Residents and visitors need to be prepared for the changing weather conditions over the next few days.

The details

On Sunday night, there is a 50% chance of precipitation across the region before 1 a.m., with winds up to 20 miles per hour. New rainfall amounts are expected to be between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Showers are likely headed into Monday morning with a 70% chance of rain, and will remain there until Tuesday, April 21. Rain chances will hit 40% much of Tuesday before they dwindle heading into Wednesday, April 22.

  • On Sunday night, April 19, scattered showers and thunderstorms will bring a 50% chance of precipitation before 1 a.m.
  • On Monday, April 20, there is a 70% chance of rain throughout the day.
  • On Tuesday, April 21, rain chances will be around 40%.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather-related warnings in the United States.

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What they’re saying

“Rain chances increase this evening in the west, then increase overnight into Monday morning for the rest of the area. Overcast skies and lighter wind is expected tonight will cool lows in the upper 40s and 50s.”

— National Weather Service

What’s next

Residents and visitors in the San Antonio area should monitor weather forecasts and be prepared for potential disruptions to outdoor activities and events due to the increased rain chances over the next few days.

The takeaway

The incoming storms highlight the unpredictable nature of weather in South Central Texas, and the importance of being prepared for sudden changes in conditions that can impact daily life and community events.