Alert archive / Colorado / Winter Weather Advisories in 2021
Winter Weather Advisory 18, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter weather advisory at Mar 9, 2021, 2:40 AM MST for 4 counties in Colorado. It took effect at Mar 9, 2021, 8:00 PM MST. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Mar 9, 2021, 2:40 AM MST (09:40 UTC)
- In effect from
- Mar 9, 2021, 8:00 PM MST
- Expired
- Mar 10, 2021, 5:00 PM MST
- In force
- 21 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Grand County, CO, Jackson County, CO, Larimer County, CO
The radar
The Cheyenne radar (KCYS), 121 km from the middle of the area, began a volume at 09:45 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 weather advisory 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 weather advisory went out at Mar 8, 8:01 PM MST, 6 hours 39 minutes earlier.
Area forecast discussion, Mar 8, 8:01 PM MST, 6 hours 39 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 Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 2:53 AM MST | Fire Weather Watch | BOU | Elbert, Lincoln | 12 hr |
| Mar 9, 2:32 PM MST | Red Flag Warning | BOU | Elbert, Lincoln | 26 hr |
Nearby
Winter Weather Advisories in Colorado, 2021Every winter weather advisory in 2021
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.