Weather

Severe Weather Alert: Flood Watch Active for St. Louis City and St. Louis County

An official National Weather Service Flood Watch is active for St. Louis City and St. Louis County, with flooding possible where heavy rain develops.

By Elise Navarro · June 26, 2026
Email Reporter
Severe Weather Alert: Flood Watch Active for St. Louis City and St. Louis County
CGN News / Cook Global News Network / CGN Severe Weather Brief / All Rights Reserved

ST. LOUIS | An official National Weather Service Flood Watch is active for St. Louis City and St. Louis County, and residents should monitor current alerts before travel, outdoor work or evening events.

What is active now

The primary active alert is a Flood Watch. The alert means conditions may support flooding where heavy rain develops, especially in low-lying areas, poor-drainage locations, creeks, ditches and roads that commonly collect water.

This CGN alert is limited to official National Weather Service alert information and the CGN St. Louis coverage area. Nearby counties may have different alert timing or conditions.

Coverage area

This alert covers St. Louis City, Missouri and St. Louis County, Missouri. Readers should also check the latest county-specific National Weather Service alert before making safety decisions, because watches can be expanded, replaced, upgraded or canceled quickly.

Safety

Do not drive through floodwater. Water can be deeper than it appears, and roads may be damaged beneath the surface. Keep children and pets away from flooded creeks, drainage areas, ditches and riverbanks.

If a Flash Flood Warning is issued, act immediately and follow official emergency instructions. Keep wireless emergency alerts enabled and monitor National Weather Service, NOAA, local emergency management and trusted local broadcast sources.

What to watch next

The watch should be updated if the National Weather Service issues, cancels, extends or replaces the active alert. CGN News will not treat forecast concern as a warning unless an official warning supports it.

Additional Reporting By: National Weather Service; NOAA; National Weather Service St. Louis

What This Means

An official National Weather Service Flood Watch is active for St. Louis City and St. Louis County. Readers should monitor current NWS alerts and local emergency information before travel or outdoor plans.

The practical concern is roadway flooding and rapidly changing conditions. Do not drive through flooded streets, and follow any later Flash Flood Warning immediately.

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