Alert archive / Illinois / River Flood Warnings in 2026

River Flood Warning 97, NWS Indianapolis, IN

May 21, 2026Gibson County, Knox County, Posey County, Indiana; 4 counties in Illinois

NWS Indianapolis, IN issued this river flood warning at May 21, 2026, 11:13 AM CDT for Gibson County, Knox County, Posey County, Indiana; 4 counties in Illinois. It took effect at May 23, 2026, 3:00 AM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: May 21, 2026, 11:13 AM CDT (16:13 UTC)
In effect from: May 23, 2026, 3:00 AM CDT
Expired: May 23, 2026, 10:43 AM CDT
In force: 8 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Flood severity: Minor

Counties Edwards County, IL, Gallatin County, IL, Wabash County, IL, White County, IL, Gibson County, IN, Knox County, IN, Posey County, IN

The radar

The Evansville,IN radar (KVWX), 14 km from the middle of the area, began a volume at 16:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Wabash River at Mount Carmel (MCRI2). The gauge peaked at 18.42 ft at May 23, 2026, 12:00 AM CDT.

Action stage: 11 ft
Minor stage: 19 ft
Moderate stage: 25 ft
Major stage: 32 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 03377500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Indianapolis, IN wrote its last area forecast discussion before this river flood warning went out at May 20, 6:02 PM CDT, 17 hours 11 minutes earlier.

Area forecast discussion, May 20, 6:02 PM CDT, 17 hours 11 minutes before

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Hazardous weather outlook, May 20, 1:58 PM CDT, 21 hours 15 minutes before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 7:23 AM CDT	River Flood Warning	IND	Johnson	23 hr
May 21, 8:05 AM CDT	River Flood Warning	IND	Lawrence, Martin	7 days
May 21, 8:05 AM CDT	River Flood Warning	IND	Lawrence, Martin	8 days

Nearby

River Flood Warnings in Illinois, 2026 River Flood Warnings in Indiana, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.