Alert archive / Montana / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 82, NWS Great Falls, MT

July 18, 2026Cascade County, Chouteau County, Teton County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 18, 2026, 6:21 PM MDT for Cascade County, Chouteau County, Teton County, Montana. It was in force for 24 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: Jul 18, 2026, 6:21 PM MDT (00:21 UTC)
Expired: Jul 18, 2026, 6:45 PM MDT
In force: 24 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Cascade County, MT, Chouteau County, MT, Teton County, MT

The radar

The Great Falls radar (KTFX), 24 km from the middle of the area, began a volume at 00:25 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 18, 3:39 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

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 Jul 18, 1:51 PM MDT, 4 hours 30 minutes earlier.

Area forecast discussion, Jul 18, 1:51 PM MDT, 4 hours 30 minutes before

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In the hours before

Special weather statement, Jul 18, 4:49 PM MDT, 1 hour 32 minutes before

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Special weather statement, Jul 18, 4:49 PM MDT, 1 hour 32 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">
        Please try again in a few minutes.
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Special weather statement, Jul 18, 5:09 PM MDT, 1 hour 12 minutes before

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Special weather statement, Jul 18, 5:41 PM MDT, 40 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Jul 18, 5:50 PM MDT, 31 minutes before

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      <p id="message2">
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Special weather statement, Jul 18, 5:56 PM MDT, 25 minutes before

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<body>
  <main class="wrap">
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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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <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 Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 6:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Cascade, Teton	43 min
Jul 18, 6:21 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	54 min
Jul 18, 6:27 PM MDT	Special Weather Statement	TFX	Toole	48 min
Jul 18, 6:38 PM MDT	Severe Thunderstorm Warning	TFX	Toole	37 min
Jul 18, 6:59 PM MDT	Special Weather Statement	TFX	Chouteau	61 min
Jul 18, 7:00 PM MDT	Special Weather Statement	TFX	Hill	45 min
Jul 18, 7:09 PM MDT	Special Weather Statement	TFX	Liberty	51 min
Jul 18, 7:14 PM MDT	Special Weather Statement	TFX	Hill	46 min
Jul 18, 7:53 PM MDT	Special Weather Statement	TFX	Broadwater, Gallatin	67 min
Jul 18, 8:00 PM MDT	Special Weather Statement	TFX	Hill	45 min
Jul 18, 8:28 PM MDT	Special Weather Statement	TFX	Fergus	32 min
Jul 18, 8:59 PM MDT	Special Weather Statement	TFX		61 min

Nearby

Severe Thunderstorm Warnings in Montana, 2026 Every severe thunderstorm 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.