Heavy rainfall raises red flags along Lake Houston and Conroe

Yesterday’s slow-moving front sparks flood concerns

Tracking flood risks (Copyright 2025 by KPRC Click2Houston - All rights reserved.)

Friday, we tracked a slow-moving cold front that brought heavy rain and thunderstorms to Houston, sparking a tornado warning and soaking areas north of Interstate 10.

Rainfall totaled 2–4 inches across the region, with the darker shade on the map representing higher rainfall numbers.

This heightens the risk for flood concerns, especially the San Jacinto River, because flows from near Huntsville, through Lake Conroe, and Lake Houston.

You can track rainfall for Montgomery/Walker right here:

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24 HOUR RAINFALL TOTALS (Copyright 2025 by KPRC Click2Houston - All rights reserved.)
Flood Risk (Copyright 2025 by KPRC Click2Houston - All rights reserved.)

This as the San Jacinto River was already high from rain earlier this year and upstream runoff in San Jacinto County.

You can track rivers near you here.

As we keep a close eye on West Fork San Jacinto @Hwy 30. Flooding is likely 239 and right now 243.15 as of this afternoon.

We’ll continue to track more rain chances throughout the week, which could make flooding worse, as recession is expected by May 7.

Tracking flooding concerns (Copyright 2025 by KPRC Click2Houston - All rights reserved.)
Tracking flood risks (Copyright 2025 by KPRC Click2Houston - All rights reserved.)

About the Author
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Meteorologist Brittany Begley's passion is making sure viewers across the Houston area are safe and prepared for their day.