Alert archive / Wyoming / Winter Storm Warnings in 2026

Winter Storm Warning 7, NWS Cheyenne, WY

May 17, 20265 counties in Wyoming

NWS Cheyenne, WY issued this winter storm warning at May 17, 2026, 1:50 AM MDT for 5 counties in Wyoming. It took effect at May 17, 2026, 6:00 PM MDT. It was in force for 24 hr. 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 17, 2026, 1:50 AM MDT (07:50 UTC)
In effect from: May 17, 2026, 6:00 PM MDT
Expired: May 18, 2026, 6:00 PM MDT
In force: 24 hr
Issued by: NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Converse County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 109 km from the middle of the area, began a volume at 07:51 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 winter storm 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 winter storm warning went out at May 17, 12:05 AM MDT, 1 hour 45 minutes earlier.

Area forecast discussion, May 17, 12:05 AM MDT, 1 hour 45 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 17, 1:50 AM MDT	Winter Weather Advisory	CYS	Albany, Carbon, Converse, Laramie, Platte	40 hr
May 17, 12:22 PM MDT	Freeze Watch	CYS	Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more	25 hr
May 17, 12:22 PM MDT	Freeze Warning	CYS	Niobrara	22 hr

Nearby

Winter Storm Warnings in Wyoming, 2026 Every winter storm 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.