Alert archive / Montana / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 41, NWS Great Falls, MT

June 15, 2025Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 15, 2025, 1:17 AM MDT for Fergus County, Montana. It was in force for 42 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: Jun 15, 2025, 1:17 AM MDT (07:17 UTC)
Expired: Jun 15, 2025, 1:59 AM MDT
In force: 42 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Fergus County, MT

The radar

The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 07:20 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 nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 7.3 hours before the alert went out and 223 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 263 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 2032 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

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 Jun 15, 12:12 AM MDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jun 15, 12:12 AM MDT, 1 hour 5 minutes before

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In the hours before

Special weather statement, Jun 14, 11:56 PM MDT, 1 hour 21 minutes before

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Special weather statement, Jun 15, 12:09 AM MDT, 1 hour 8 minutes before

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      <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.
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      <p id="message2">
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Local storm report, Jun 15, 12:27 AM MDT, 50 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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Local storm report, Jun 15, 12:31 AM MDT, 46 minutes before

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</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.
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Special weather statement, Jun 15, 12:56 AM MDT, 21 minutes before

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<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>
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Special weather statement, Jun 15, 1:02 AM MDT, 15 minutes before

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<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>
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</body>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 6:19 PM MDT	Special Weather Statement	TFX	Judith Basin	26 min
Jun 14, 6:26 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	49 min
Jun 14, 6:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min
Jun 14, 6:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	43 min
Jun 14, 7:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	53 min
Jun 14, 7:39 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	50 min
Jun 14, 7:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Fergus	64 min
Jun 14, 8:20 PM MDT	Special Weather Statement	TFX	Meagher	40 min
Jun 14, 8:23 PM MDT	Special Weather Statement	TFX	Judith Basin	37 min
Jun 14, 8:27 PM MDT	Special Weather Statement	TFX		48 min
Jun 14, 8:57 PM MDT	Special Weather Statement	TFX	Blaine	48 min
Jun 14, 9:02 PM MDT	Special Weather Statement	TFX		43 min
Jun 14, 9:03 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 14, 9:29 PM MDT	Special Weather Statement	TFX	Meagher	46 min
Jun 14, 9:33 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 14, 9:49 PM MDT	Special Weather Statement	TFX	Blaine	26 min
Jun 14, 10:28 PM MDT	Special Weather Statement	TFX	Wheatland	32 min
Jun 14, 11:09 PM MDT	Special Weather Statement	TFX	Fergus	51 min
Jun 14, 11:21 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	39 min
Jun 14, 11:39 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	36 min
Jun 14, 11:56 PM MDT	Special Weather Statement	TFX	Fergus	49 min
Jun 15, 12:09 AM MDT	Special Weather Statement	TFX	Fergus	51 min
Jun 15, 12:56 AM MDT	Special Weather Statement	TFX	Judith Basin	34 min
Jun 15, 1:02 AM MDT	Special Weather Statement	TFX	Fergus	43 min
Jun 15, 1:36 AM MDT	Special Weather Statement	TFX	Judith Basin	39 min
Jun 15, 1:48 AM MDT	Special Weather Statement	TFX	Chouteau	42 min
Jun 15, 2:13 AM MDT	Special Weather Statement	TFX	Judith Basin	47 min
Jun 15, 4:33 AM MDT	Special Weather Statement	TFX	Fergus	42 min
Jun 15, 4:53 AM MDT	Special Weather Statement	TFX		37 min
Jun 15, 5:10 AM MDT	Special Weather Statement	TFX	Petroleum	35 min
Jun 15, 11:49 AM MDT	Special Weather Statement	TFX	Blaine	56 min
Jun 15, 12:38 PM MDT	Special Weather Statement	TFX	Judith Basin	37 min
Jun 15, 1:16 PM MDT	Special Weather Statement	TFX	Fergus	29 min
Jun 15, 1:34 PM MDT	Special Weather Statement	TFX	Fergus	26 min
Jun 15, 1:46 PM MDT	Special Weather Statement	TFX	Judith Basin	29 min
Jun 15, 1:53 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	25 min
Jun 15, 2:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Fergus, Judith Basin	33 min
Jun 15, 2:23 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	26 min
Jun 15, 2:33 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	27 min
Jun 15, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	25 min
Jun 15, 3:16 PM MDT	Special Weather Statement	TFX	Cascade	29 min
Jun 15, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	52 min
Jun 15, 3:23 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	37 min
Jun 15, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Teton	41 min
Jun 15, 3:51 PM MDT	Special Weather Statement	TFX	Chouteau	24 min
Jun 15, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	64 min
Jun 15, 4:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Chouteau	38 min
Jun 15, 4:25 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	21 min
Jun 15, 4:29 PM MDT	Tornado Warning	TFX	Chouteau	31 min
Jun 15, 4:48 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	27 min
Jun 15, 4:50 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau	55 min
Jun 15, 4:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Chouteau, Fergus	33 min
Jun 15, 5:07 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	23 min
Jun 15, 5:15 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	35 min
Jun 15, 5:21 PM MDT	Special Weather Statement	TFX	Blaine	39 min
Jun 15, 5:29 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	40 min
Jun 15, 5:41 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	64 min
Jun 15, 5:42 PM MDT	Special Weather Statement	TFX	Blaine	63 min
Jun 15, 5:44 PM MDT	Special Weather Statement	TFX	Meagher	46 min

Nearby

Severe Thunderstorm Warnings in Montana, 2025 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.