Alert archive / Wisconsin / River Flood Warnings in 2026

River Flood Warning 40, NWS Milwaukee, WI

April 18, 2026Milwaukee County, Wisconsin

NWS Milwaukee, WI issued this river flood warning at Apr 18, 2026, 10:17 AM CDT for Milwaukee County, Wisconsin. It was in force for 36 hr.

The area

The counties it named.

The facts

Issued: Apr 18, 2026, 10:17 AM CDT (15:17 UTC)
Expired: Apr 19, 2026, 10:00 PM CDT
In force: 36 hr
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Flood severity: Minor

County Milwaukee County, WI

The radar

The Milwaukee radar (KMKX), 51 km from the middle of the area, began a volume at 15:19 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 Root River at Franklin (FRKW3). The gauge peaked at 8.33 ft at Apr 18, 2026, 4:00 PM CDT.

Action stage: 7 ft
Minor stage: 8 ft
Moderate stage: 10 ft
Major stage: 12 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 04087220, 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 Milwaukee, WI wrote its last area forecast discussion before this river flood warning went out at Apr 18, 6:50 AM CDT, 3 hours 27 minutes earlier.

Area forecast discussion, Apr 18, 6:50 AM CDT, 3 hours 27 minutes before

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Hazardous weather outlook, Apr 18, 6:57 AM CDT, 3 hours 20 minutes before

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  <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.
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The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 17, 7:01 PM CDT	Flash Flood Warning	MKX	Jefferson, Rock, Walworth	2 hr
Apr 17, 7:04 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Rock, Walworth, Waukesha	71 min
Apr 17, 7:07 PM CDT	Tornado Warning	MKX	Waukesha	19 min
Apr 17, 7:11 PM CDT	Tornado Warning	MKX	Kenosha, Racine, Walworth	49 min
Apr 17, 7:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Jefferson, Rock, Walworth, Waukesha	41 min
Apr 17, 7:25 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	50 min
Apr 17, 7:33 PM CDT	Tornado Warning	MKX	Racine, Waukesha	27 min
Apr 17, 7:43 PM CDT	Flash Flood Warning	MKX	Jefferson, Milwaukee, Racine, Walworth, Waukesha	2 hr
Apr 17, 7:46 PM CDT	Tornado Warning	MKX	Kenosha, Racine, Walworth	59 min
Apr 17, 7:56 PM CDT	Tornado Warning	MKX	Milwaukee, Waukesha	38 min
Apr 17, 8:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Milwaukee, Waukesha	22 min
Apr 17, 8:44 PM CDT	Special Weather Statement	MKX	Kenosha, Racine	16 min
Apr 17, 8:48 PM CDT	Areal Flood Advisory	MKX	Kenosha, Racine	3 hr
Apr 17, 9:13 PM CDT	Areal Flood Warning	MKX	Rock	5 hr
Apr 17, 9:21 PM CDT	Areal Flood Warning	MKX	Jefferson, Rock, Walworth	5 hr
Apr 17, 9:34 PM CDT	Special Marine Warning	MKX		41 min
Apr 17, 9:59 PM CDT	Areal Flood Warning	MKX	Milwaukee, Racine, Walworth, Waukesha	4 hr
Apr 17, 10:08 PM CDT	River Flood Warning	MKX	Jefferson, Rock	21 days
Apr 17, 10:12 PM CDT	River Flood Warning	MKX	Rock	24 hr
Apr 17, 10:12 PM CDT	River Flood Warning	MKX	Green	3 days
Apr 17, 11:18 PM CDT	River Flood Warning	MKX	Racine	23 hr
Apr 18, 5:27 AM CDT	River Flood Warning	MKX	Sheboygan	17 hr

Nearby

River Flood Warnings in Wisconsin, 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.