Flash Flood Warning — Johnson County, Iowa
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
✅ No Active Flash Flood Warning
Last one for Johnson County ended August 12, 2026 at 10:40 AM ET. This page updates automatically the moment the National Weather Service issues a new one.
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Quad Cities IA IL
Last Checked
7 minutes ago
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Iowa
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Flash Flood Warning Alerts for Johnson County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Johnson County, Iowa?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Not right now. The last one for Johnson County ended August 12, 2026 at 10:40 AM ET. This page automatically updates the moment a new one is issued.
How do I get notified about Flash Flood Warning alerts for Johnson County?
Download StormCast free on Google Play and set Johnson County, Iowa as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Flash Flood Warning is also in effect for Benton County, Linn County, Iowa County.