With quiet conditions in control on the morning of the 22nd, moisture trapped in valley locations across northwestern Colorado led to the development of dense fog for a few hours.
Every event with a place to put it; 3 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.
With quiet conditions in control on the morning of the 22nd, moisture trapped in valley locations across northwestern Colorado led to the development of dense fog for a few hours.
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 Dec 22, 4:28 AM MST, 4 hours 32 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>Hazardous Weather Outlook National Weather Service Grand Junction CO 300 AM MST Fri Dec 22 2023 COZ001>014-017>023-UTZ022>025-027>029-231500- Lower Yampa River Basin-Central Yampa River Basin- Roan and Tavaputs Plateaus-Elkhead and Park Mountains- Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor- Central Colorado River Basin-Grand and Battlement Mesas- Gore and Elk Mountains/Central Mountain Valleys- Central Gunnison and Uncompahgre River Basin- West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley- Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains- Southwest San Juan Mountains-Paradox Valley/Lower Dolores River- Four Corners/Upper Dolores River-Animas River Basin- San Juan River Basin-Southeast Utah-Eastern Uinta Mountains- Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat- La Sal and Abajo Mountains-Canyonlands/Natural Bridges- 300 AM MST Fri Dec 22 2023 This Hazardous Weather Outlook is for northwest Colorado, southwest Colorado, west central Colorado, east central Utah, northeast Utah and southeast Utah. .DAY ONE...Today and tonight. Clouds will increase today across the region as the next system lifts into the Four Corners. Isolated showers will develop over southeast Utah this afternoon before activity spreads to southwest Colorado tonight. Rates will increase over the San Juan Mountains with 6 or more inches likely by Saturday morning. Snow levels will generally remain high resulting in rain or a wet mix in the valleys. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Scattered to numerous showers are expected through the weekend with moderate to heavy snowfall in the mountains. Impacts to holiday travel are a concern, especially over the high mountain passes such as Red Mountain, Coal Bank, Wolf Creek, and Molas. Snow spreads to the northern and central mountains Saturday afternoon and evening before drier air moves in Sunday night. High pressure builds in on Christmas Day with dry weather prevailing through at least mid next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
3 dense fog. Local standard time, as filed.
Dense fog was observed across the Central Colorado River Basin, including at the Eagle County Regional Airport where visibility was reduced to less than one quarter of a mile periodically over the course of two hours.
Dense fog was observed across the Central Yampa River Basin, including at the Craig-Moffat County Airport where visibility was reduced to less than one quarter of a mile several times over the course of two hours.
Dense fog was observed across the Upper Yampa River Basin, including at the Steamboat Springs Airport - Bob Adams Field where visibility was reduced to less than one quarter of a mile several times over the course of a two hour period.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2023Every state in 2023This day in weather historyWarnings in Colorado, December 2023
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: 1149392, 1149393, 1149394.