A moist and cold Pacific trough produced late-season heavy snow in many mountain areas of western Colorado.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GJT wrote it up.
A moist and cold Pacific trough produced late-season heavy snow in many mountain areas of western Colorado.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before the first event at Apr 24, 10:49 AM MST, 1 hour 11 minutes earlier.
<!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><!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 national radar mosaic for the moment the first event began.
4 heavy snow, 3 winter weather. Local standard time, as filed.
Widespread snowfall amounts of 4 to 8 inches were measured above the 9000 foot level. Locally higher amounts included 12 inches at Red Mountain Pass.
Widespread snowfall amounts of 6 to 12 inches were measured above the 9000 foot level. Locally higher amounts included 15 inches at Coal Bank Pass and the Columbus Basin SNOTEL site.
Snowfall amounts of 5 to 10 inches were measured across most of the area above the 9000 foot level.
Widespread snowfall amounts of 6 to 12 inches were measured above the 9000 foot level.
Snowfall amounts of 2 to 4 inches were measured above the 9000 foot level.
Snowfall amounts of 1 to 3 inches were measured above the 9000 foot level. Locally higher amounts included 7 inches at the Tower SNOTEL site.
Snowfall amounts of 1 to 4 inches were measured above the 9000 foot level. Locally higher amounts included 8 inches on Vail Pass.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2015Every state in 2015This day in weather historyWarnings in Colorado, April 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 566290, 566291, 566289, 566288, 566293, 566294, 566292.