Two middle and upper level troughs moved across the region with an associated cold front and jet entrance regions providing enough lift and moisture to produce widespread snow and low visibility across the region. Much of the lower elevations received over 6 inches of snowfall.
Every event with a place to put it; 15 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 CYS wrote it up.
Two middle and upper level troughs moved across the region with an associated cold front and jet entrance regions providing enough lift and moisture to produce widespread snow and low visibility across the region. Much of the lower elevations received over 6 inches of snowfall. The Sierra Madre and Snowy Range had SNOTELs over 10,000 feet measuring over 20 inches of snowfall and 3 inches of snow water equivalent.
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 Cheyenne, WY wrote its last area forecast discussion before the first event at Apr 28, 3:16 PM MST, 14 hours 44 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>The national radar mosaic for the moment the first event began.
15 heavy snow. Local standard time, as filed.
Old Battle sensor located at 10,000 feet ten miles west-southwest of Encampment measured an estimated 32.6 inches of snowfall with over 3 inches of snow water equivalent.
Sensors at North French Creek and Med Bow both at elevations above 10,000 feet measured over 20 inches of total snowfall with over 2.5 inches of snow water equivalent.
Cheyenne office staff measured 7.3 inches of total snowfall.
Observer in Rawlins measured an estimated 7.0 inches of snowfall.
Observer located three miles north of Saratoga measure 7.0 inches of snowfall.
Crow Creek sensor at an elevation of 8330 feet measured an estimated amount of 15.5 inches of snowfall using a roughly 12 to 1 snow ratio.
Observer located five miles east-northeast of Shirley Basin measured a storm total of 8.0 inches of snowfall.
Observer located four miles northeast of Centennial measured 6.0 inches of snowfall.
Sensor located eleven miles north-northeast of Garrett had estimated snowfall total of a foot of snow.
Observer located fifteen miles west-southwest of Bordeaux measured 6.0 inches of snowfall.
Several observers in Laramie measured over 5 inches with local higher totals reaching above 6 inches with drifting affecting totals.
Observer at the Terry Bison Ranch nine miles south of Cheyenne measured a snowfall total of 6.0 inches.
Observer in Douglas reported storm total of 7.0 inches of snow.
Observer in Lusk measured storm total snowfall of 6.5 inches.
Observer located one mile south-southwest of Muddy Gap measured a storm total snowfall of 6.0 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2019Every state in 2019This day in weather historyWarnings in Wyoming, April 2019
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 2026-10-01. Each event’s entry at NCEI: 812415, 812416, 812408, 812409, 812234, 812235, 812403, 812404, 812405, 812406, 812413, 812414, 812410, 812411, 812412.