Flash Flood Warning — Linn County, Iowa
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 12 at 7:35AM CDT until August 12 at 11:15AM CDT by NWS Quad Cities IA IL
At 735 AM CDT, local law enforcement reported some standing water on main roads, including on portions of I-380. The primary thunderstorms have moved out of the area but flash flooding is expected to linger. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Law enforcement reported. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Iowa City, Marengo, West Branch, Coralville, North Liberty, Fairfax, Solon, Tiffin, Ely, Atkins, Walford, Swisher, Newhall, Oxford, Blairstown, Van Horne, Keystone, Shueyville and Norway. This includes the following highways... Interstate 80 in Iowa between mile markers 239 and 253. Interstate 380 between mile markers 1 and 17.
Effective August 12, 2026 at 8:35 AM ET · Expires August 12, 2026 at 12:15 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Quad Cities IA IL
Expires
August 12, 2026 at 12:15 PM ET
Last Checked
1 hour ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Also In Effect For
This same Flash Flood Warning also covers:
Other Active Alerts in Iowa
Flash Flood Warning
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Flash Flood Warning Alerts for Linn 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 Linn 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?
Yes — this alert is active as of our last check (1 hour ago). It's set to expire August 12, 2026 at 12:15 PM ET.
How do I get notified about Flash Flood Warning alerts for Linn County?
Download StormCast free on Google Play and set Linn 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, Iowa County.