Alert archive / Wyoming / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 8, NWS Cheyenne, WY

May 13, 2025Niobrara County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 13, 2025, 11:39 PM MDT for Niobrara County, Wyoming. It was in force for 36 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 13, 2025, 11:39 PM MDT (05:39 UTC)
Expired: May 14, 2025, 12:15 AM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Niobrara County, WY

The radar

The Rapid City radar (KUDX), 178 km from the middle of the area, began a volume at 05:40 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 Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 13, 10:38 PM MDT, 1 hour 1 minute earlier.

Area forecast discussion, May 13, 10:38 PM MDT, 1 hour 1 minute 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>

Hazardous weather outlook, May 13, 4:33 AM MDT, 19 hours 6 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 Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 3:33 PM MDT	Special Weather Statement	CYS	Laramie	27 min
May 14, 3:59 PM MDT	Special Weather Statement	CYS	Kimball	31 min
May 14, 4:31 PM MDT	Special Weather Statement	CYS	Kimball	29 min
May 14, 4:55 PM MDT	Special Weather Statement	CYS	Kimball	50 min
May 14, 5:03 PM MDT	Special Weather Statement	CYS	Scotts Bluff	27 min
May 14, 5:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Banner, Scotts Bluff	34 min
May 14, 5:25 PM MDT	Special Weather Statement	CYS	Banner	35 min
May 14, 5:45 PM MDT	Special Weather Statement	CYS	Cheyenne	45 min
May 14, 5:47 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	28 min
May 14, 5:54 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	36 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 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; radar from the NEXRAD Level II archive.