Flood Warning — Johnson County, Missouri
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Current Status
🌊 Active: Flood Warning
Flood Warning issued August 5 at 9:46PM CDT until August 8 at 12:00PM CDT by NWS Kansas City/Pleasant Hill MO
...The National Weather Service in Kansas City/Pleasant Hill has issued a Flood Warning for the following rivers in Missouri... Big Creek at Blairstown affecting Henry, Cass and Johnson Counties. * WHAT...Minor flooding is forecast. * WHERE...Big Creek at Blairstown. * WHEN...From Thursday morning to Saturday afternoon. * IMPACTS...At 20.0 feet, The west bank of the creek begins to flood. At 23.0 feet, Flooding occurs at the west approach to the N Highway bridge located 0.2 miles west of Blairstown. Flooding also occurs across B Highway near Big Creek which is several miles northwest of Blairstown. * ADDITIONAL DETAILS... - At 9:00 PM CDT Wednesday the stage was 11.6 feet. - Forecast...The river is expected to rise above flood stage tomorrow morning to a crest of 21.9 feet tomorrow evening. It will then fall below flood stage early Friday afternoon. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood
Effective August 5, 2026 at 10:46 PM ET · Expires August 6, 2026 at 11:00 PM ET
Event Details
Event Type
Flood Warning
Severity
severe
Issued By
NWS Kansas City/Pleasant Hill MO
Expires
August 6, 2026 at 11:00 PM ET
Last Checked
just now
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. This product along with additional weather and stream information is available at www.weather.gov/kc/.
Also In Effect For
This same Flood Warning also covers:
Other Active Alerts in Missouri
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Flood Warning
Flood Warning
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Frequently Asked Questions
What does a Flood Warning mean for Johnson County, Missouri?
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Is this Flood Warning currently active?
Yes — this alert is active as of our last check (just now). It's set to expire August 6, 2026 at 11:00 PM ET.
How do I get notified about Flood Warning alerts for Johnson County?
Download StormCast free on Google Play and set Johnson County, Missouri 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 Flood Warning is also in effect for Cass County, Henry County.