Flood Warning issued for Johnson, Louisa, Washington Counties IA

Source: NOAA · Eastern Iowa

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NWS Quad Cities IA IL has issued a Flood Warning for rivers in eastern Iowa including the Iowa River near Lone Tree, effective from late Thursday night through early Saturday morning.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on July 5, 2026 and geographically references Eastern Iowa. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

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Alert Details

Flood Warning issued by NWS Quad Cities IA IL (NOAA). Sent June 10 at 9:15PM CDT. Effective from June 10 at 9:15PM CDT. Onset late Thursday night June 12 at 5:40AM CDT. Expires June 11 at 9:15PM CDT. Ends June 13 at 12:01AM CDT.

Affected Areas

Johnson County IA, Louisa County IA, and Washington County IA. Specific rivers include:

  • Iowa River near Lone Tree (Johnson, Louisa, Washington Counties)
  • Cedar River near Conesville (Muscatine and Louisa Counties)
  • English River at Kalona (Johnson and Washington Counties)

What You Should Do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas.

Expected Conditions

Minor flooding is forecast. At 16.0 feet, flood waters affect parts of Lola Lane and Y Avenue. River Junction Access Park is closed. At 9:00 PM CDT Wednesday the stage was 11.2 feet and beginning to rise.

Timeline

The river will rise above flood stage early Friday morning to 16.6 feet early Friday afternoon. It will then fall below flood stage Friday afternoon to 13.5 feet Saturday morning. It will rise to 14.2 feet Sunday morning. It will then fall again and remain below flood stage. Flood stage is 16.0 feet.

Original source: NOAA Official Notice ↗

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Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
NWS Quad Cities IA IL has issued a Flood Warning for rivers in eastern Iowa including the Iowa River near Lone Tree, effective from late Thursday night through early Saturday morning.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Eastern Iowa. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.