Alert archive / Montana / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 17, NWS Great Falls, MT

May 11, 20254 counties in Montana

NWS Great Falls, MT issued this severe thunderstorm warning at May 11, 2025, 5:56 PM MDT for 4 counties in Montana. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 11, 2025, 5:56 PM MDT (23:56 UTC)
Expired
May 11, 2025, 6:54 PM MDT
In force
58 min
Issued by
NWS Great Falls, MT
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Blaine County, MT, Chouteau County, MT, Fergus County, MT, Hill County, MT

The radar

The Great Falls radar (KTFX), 143 km from the middle of the area, began a volume at 23:56 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.

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 11, 5:47 PM MDT, 9 minutes earlier.

Area forecast discussion, May 11, 5:47 PM MDT, 9 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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In the hours before

Special weather statement, May 11, 3:47 PM MDT, 2 hours 9 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>
Special weather statement, May 11, 4:15 PM MDT, 1 hour 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>
Special weather statement, May 11, 4:29 PM MDT, 1 hour 27 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, May 11, 4:47 PM MDT, 1 hour 9 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, May 11, 5:07 PM MDT, 49 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>
Special weather statement, May 11, 5:31 PM MDT, 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>

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 6:04 PM MDTSpecial Weather StatementTFXWheatland56 min
May 10, 6:13 PM MDTSevere Thunderstorm WarningTFXBlaine, Fergus62 min
May 10, 6:26 PM MDTSpecial Weather StatementTFXHill34 min
May 10, 6:31 PM MDTSevere Thunderstorm WarningTFXFergus, Judith Basin59 min
May 10, 6:34 PM MDTSpecial Weather StatementTFXCascade, Lewis and Clark56 min
May 10, 6:41 PM MDTSevere Thunderstorm WarningTFXBlaine27 min
May 10, 6:53 PM MDTSpecial Weather StatementTFXFergus37 min
May 10, 7:05 PM MDTSevere Thunderstorm WarningTFXCascade, Chouteau55 min
May 10, 7:06 PM MDTSpecial Weather StatementTFXHill24 min
May 10, 7:21 PM MDTSevere Thunderstorm WarningTFXFergus24 min
May 10, 7:42 PM MDTSpecial Weather StatementTFXFergus63 min
May 10, 7:42 PM MDTSevere Thunderstorm WarningTFXBlaine, Hill37 min
May 10, 8:46 PM MDTSpecial Weather StatementTFXMeagher44 min
May 10, 11:10 PM MDTSpecial Weather StatementTFXFergus50 min
May 11, 2:13 AM MDTSpecial Weather StatementTFXGallatin47 min
May 11, 12:58 PM MDTSpecial Weather StatementTFX32 min
May 11, 1:41 PM MDTSpecial Weather StatementTFXLewis and Clark34 min
May 11, 2:13 PM MDTSpecial Weather StatementTFXCascade32 min
May 11, 2:44 PM MDTSevere Thunderstorm WarningTFXCascade, Chouteau, Pondera, Teton46 min
May 11, 2:51 PM MDTSpecial Weather StatementTFX39 min
May 11, 3:01 PM MDTSpecial Weather StatementTFXJefferson44 min
May 11, 3:27 PM MDTSevere Thunderstorm WarningTFXCascade, Chouteau, Fergus, Hill, Judith Basin, Teton63 min
May 11, 3:32 PM MDTSpecial Weather StatementTFXCascade43 min
May 11, 3:47 PM MDTSpecial Weather StatementTFXBroadwater43 min
May 11, 4:15 PM MDTSpecial Weather StatementTFXJudith Basin45 min
May 11, 4:27 PM MDTSevere Thunderstorm WarningTFXBlaine, Chouteau, Fergus, Hill93 min
May 11, 4:29 PM MDTSpecial Weather StatementTFXBroadwater46 min
May 11, 5:31 PM MDTSpecial Weather StatementTFXJudith Basin59 min

Nearby

Severe Thunderstorm Warnings in Montana, 2025Every severe thunderstorm warning in 2025

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.