Flood Warning Issued for Wabash River in Illinois and Indiana

Source: NOAA · Illinois and Indiana

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NWS Indianapolis has issued a Flood Warning for the Wabash River affecting portions of Illinois and Indiana through Monday evening.

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

This notice was issued by NOAA on July 3, 2026 and geographically references Illinois and Indiana. 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 warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.

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

A Flood Warning has been issued by the National Weather Service in Indianapolis IN. The alert is effective from Thursday morning through Monday evening.

Affected Areas

The warning covers Clark County IL, Crawford County IL, Sullivan County IN, and Vigo County IN. Specific river locations include the Wabash River at Hutsonville Legacy Power Plant Site, Terre Haute, and Riverton.

What You Should Do

Turn around, don't drown when encountering flooded roads. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov/ind.

Expected Conditions

Minor flooding is forecast. Heavy rainfall of upwards of six inches since Saturday night in the Wabash basin is bringing minor flooding to portions of the Wabash River. Lowland minor flooding is expected from Montezuma through Riverton. At 17.5 feet, a few sloughs and a drainage have water in them in the vicinity of SR 63 on the west side of the Wabash River.

Timeline

The alert was sent June 10 at 1:21PM EDT and is effective from Thursday morning (June 11 at 6:00AM EDT) to Monday evening (June 15 at 6:00PM EDT). The river is expected to rise above flood stage tomorrow morning to a crest of 17.7 feet Friday evening at Terre Haute. It will then fall below flood stage Monday morning. Flood stage is 16.5 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 Indianapolis has issued a Flood Warning for the Wabash River affecting portions of Illinois and Indiana through Monday evening.
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 Illinois and Indiana. 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.