Alert archive / Illinois / River Flood Warnings in 2026

River Flood Warning 16, NWS Lincoln, IL

June 11, 2026Cass County, Fulton County, Mason County, Illinois

NWS Lincoln, IL issued this river flood warning at Jun 11, 2026, 11:37 AM CDT for Cass County, Fulton County, Mason County, Illinois. It took effect at Jun 12, 2026, 4:00 PM CDT. It was in force for 36 days.

The area

The counties it named.

The facts

Issued: Jun 11, 2026, 11:37 AM CDT (16:37 UTC)
In effect from: Jun 12, 2026, 4:00 PM CDT
Expired: Jul 18, 2026, 9:41 AM CDT
In force: 36 days
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: Moderate

Counties Cass County, IL, Fulton County, IL, Mason County, IL

The radar

The Lincoln radar (KILX), 67 km from the middle of the area, began a volume at 16:41 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 Illinois River near Havana (HAVI2).

Action stage: 13 ft
Minor stage: 14 ft
Moderate stage: 17 ft
Major stage: 23 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, 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 Lincoln, IL wrote its last area forecast discussion before this river flood warning went out at Jun 11, 6:12 AM CDT, 5 hours 25 minutes earlier.

Area forecast discussion, Jun 11, 6:12 AM CDT, 5 hours 25 minutes before

<!doctype html>
<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>

Hazardous weather outlook, Jun 11, 5:24 AM CDT, 6 hours 13 minutes before

<!doctype html>
<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>

In the hours before

Local storm report, Jun 11, 5:54 AM CDT, 5 hours 43 minutes before

<!doctype html>
<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>

Local storm report, Jun 11, 5:56 AM CDT, 5 hours 41 minutes before

<!doctype html>
<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>

Local storm report, Jun 11, 5:59 AM CDT, 5 hours 38 minutes before

<!doctype html>
<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>

Local storm report, Jun 11, 6:17 AM CDT, 5 hours 20 minutes before

<!doctype html>
<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 Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 7:24 PM CDT	Severe Thunderstorm Warning	ILX	Knox, Marshall, Peoria, Stark	66 min
Jun 10, 8:07 PM CDT	Flash Flood Warning	ILX	Knox, Peoria, Stark	3 hr
Jun 10, 8:37 PM CDT	Severe Thunderstorm Warning	ILX	McLean, Marshall, Tazewell, Woodford	38 min
Jun 10, 8:53 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Knox	52 min
Jun 10, 9:14 PM CDT	Flash Flood Warning	ILX	Fulton, Knox, Marshall, Peoria, Stark, Woodford	5 hr
Jun 10, 10:00 PM CDT	Flash Flood Warning	ILX	Fulton, Mason, Peoria, Tazewell	4 hr
Jun 10, 10:36 PM CDT	Severe Thunderstorm Warning	ILX	Mason, Tazewell	24 min
Jun 10, 10:46 PM CDT	Severe Thunderstorm Warning	ILX	McLean, Tazewell	44 min
Jun 10, 10:58 PM CDT	Tornado Warning	ILX	Logan, Macon, Menard, Sangamon	36 min
Jun 10, 11:05 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Macon, Mason, Menard and 1 more	40 min
Jun 10, 11:12 PM CDT	Tornado Warning Tornado observed	ILX	Christian, Logan, Macon, Sangamon	34 min
Jun 10, 11:14 PM CDT	Tornado Warning	ILX	DeWitt, Logan	16 min
Jun 10, 11:28 PM CDT	Tornado Warning	ILX	Logan, Macon, Piatt	47 min
Jun 10, 11:30 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Cumberland, Logan, Macon, Moultrie, Piatt and 2 more	60 min
Jun 10, 11:39 PM CDT	Tornado Warning	ILX	Christian, Macon, Moultrie, Shelby	35 min
Jun 10, 11:45 PM CDT	Tornado Warning	ILX	Christian, Macon, Moultrie, Piatt, Shelby	28 min
Jun 10, 11:46 PM CDT	Flash Flood Warning	ILX	McLean, Tazewell, Woodford	4 hr
Jun 10, 11:48 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, DeWitt, McLean, Macon, Piatt	57 min
Jun 10, 11:51 PM CDT	Tornado Warning Tornado observed	ILX	DeWitt, Piatt	25 min
Jun 11, 12:09 AM CDT	River Flood Warning	ILX	Fulton, Knox	60 hr
Jun 11, 12:12 AM CDT	Tornado Warning	ILX	Champaign, Douglas	19 min
Jun 11, 12:19 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Moultrie, Piatt	24 min
Jun 11, 2:11 AM CDT	Flash Flood Warning	ILX	Sangamon	3 hr
Jun 11, 2:32 AM CDT	Flash Flood Warning	ILX	Macon	56 min
Jun 11, 6:17 AM CDT	River Flood Warning	ILX	McLean, Tazewell, Woodford	16 hr
Jun 11, 11:38 AM CDT	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	38 days
Jun 11, 11:39 AM CDT	Flood Watch	ILX	Cass, DeWitt, Fulton, Knox, Logan, McLean and 8 more	9 hr
Jun 11, 11:47 AM CDT	Severe Thunderstorm Warning	ILX	Knox	43 min
Jun 11, 12:34 PM CDT	Special Weather Statement	ILX	Knox	26 min
Jun 11, 1:04 PM CDT	Special Weather Statement	ILX	Peoria	26 min
Jun 11, 4:49 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Woodford	41 min
Jun 11, 4:56 PM CDT	Tornado Warning	ILX	Marshall, Peoria, Woodford	36 min
Jun 11, 5:11 PM CDT	Tornado Warning EmergencyTornado observedCatastrophic damage threat	ILX	Marshall	14 min
Jun 11, 5:12 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Knox, Peoria	48 min
Jun 11, 5:15 PM CDT	Tornado Warning	ILX	Woodford	14 min
Jun 11, 5:19 PM CDT	Tornado Warning	ILX	Fulton, Mason, Tazewell	41 min
Jun 11, 5:30 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Schuyler	60 min
Jun 11, 5:31 PM CDT	Tornado Warning	ILX	Fulton, Peoria	31 min
Jun 11, 5:40 PM CDT	Flash Flood Warning	ILX	Fulton, Peoria	5 hr
Jun 11, 5:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Mason, Peoria, Tazewell	41 min
Jun 11, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Cass, Mason, Menard	39 min
Jun 11, 5:59 PM CDT	Tornado Warning	ILX	Cass, Mason, Schuyler	31 min
Jun 11, 6:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	McLean, Tazewell, Woodford	65 min
Jun 11, 6:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	DeWitt, Logan, Macon	61 min
Jun 11, 6:15 PM CDT	Tornado Warning	ILX	Tazewell, Woodford	17 min
Jun 11, 6:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Cass, Mason, Menard, Morgan, Sangamon	45 min
Jun 11, 6:34 PM CDT	Tornado Warning	ILX	McLean	10 min
Jun 11, 6:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	Champaign, DeWitt, McLean, Macon, Piatt	60 min

Nearby

River Flood Warnings in Illinois, 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.