Alert archive / Colorado / Winter Storm Warnings in 2025

Winter Storm Warning 6, NWS Denver/Boulder, CO

May 5, 20259 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm warning at May 5, 2025, 2:14 PM MDT for 9 counties in Colorado. It took effect at May 6, 2025, 6:00 AM MDT. It was in force for 27 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 5, 2025, 2:14 PM MDT (20:14 UTC)
In effect from: May 6, 2025, 6:00 AM MDT
Expired: May 7, 2025, 9:00 AM MDT
In force: 27 hr
Issued by: NWS Denver/Boulder, CO

Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO

The radar

The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 20:14 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 Denver/Boulder, CO wrote its last area forecast discussion before this winter storm warning went out at May 5, 12:05 PM MDT, 2 hours 9 minutes earlier.

Area forecast discussion, May 5, 12:05 PM MDT, 2 hours 9 minutes before

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Hazardous weather outlook, May 5, 10:47 AM MDT, 3 hours 27 minutes before

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  <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.
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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 5, 2:14 PM MDT	Winter Weather Advisory	BOU	Boulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 1 more	43 hr

Nearby

Winter Storm Warnings in Colorado, 2025 Every winter storm 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.