Alert archive / Montana / River Flood Warnings in 2023

River Flood Warning 3, NWS Great Falls, MT

April 11, 2023Blaine County, Montana

NWS Great Falls, MT issued this river flood warning at Apr 11, 2023, 2:08 AM MDT for Blaine County, Montana. It took effect at Apr 11, 2023, 7:17 AM MDT. It was in force for 10 days.

The area

The counties it named.

The facts

Issued: Apr 11, 2023, 2:08 AM MDT (08:08 UTC)
In effect from: Apr 11, 2023, 7:17 AM MDT
Expired: Apr 20, 2023, 8:39 PM MDT
In force: 10 days
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Flood severity: Minor

County Blaine County, MT

The radar

The Glasgow radar (KGGW), 174 km from the middle of the area, began a volume at 08:11 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 Milk River near Harlem (HRLM8).

Action stage: 20 ft
Minor stage: 21 ft
Moderate stage: 23 ft
Major stage: 25 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06154100, 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 Great Falls, MT wrote its last area forecast discussion before this river flood warning went out at Apr 10, 5:10 PM MDT, 8 hours 58 minutes earlier.

Area forecast discussion, Apr 10, 5:10 PM MDT, 8 hours 58 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 Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 6:24 PM MDT	Areal Flood Advisory	TFX	Gallatin	21 hr
Apr 10, 7:08 PM MDT	Areal Flood Advisory	TFX	Hill, Liberty	20 hr
Apr 11, 2:29 PM MDT	Winter Storm Warning	TFX	Beaverhead, Blaine, Broadwater, Cascade, Chouteau, Fergus and 8 more	58 hr
Apr 11, 2:29 PM MDT	Winter Weather Advisory	TFX	Beaverhead, Blaine, Broadwater, Cascade, Chouteau, Fergus and 9 more	58 hr
Apr 11, 3:15 PM MDT	Areal Flood Advisory	TFX	Blaine, Chouteau, Hill, Liberty	70 hr
Apr 11, 3:30 PM MDT	Areal Flood Advisory	TFX	Gallatin, Meagher	24 hr

Nearby

River Flood Warnings in Montana, 2023 Every river flood warning in 2023

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.