Clearing skies and very moist air near the surface from new snowfall produced dense fog in some west-central Colorado valleys.
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The episode as NWS GJT wrote it up.
Clearing skies and very moist air near the surface from new snowfall produced dense fog in some west-central Colorado valleys.
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 24, 6:11 PM MST, 49 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 dense fog. Local standard time, as filed.
Dense fog occurred across portions of the Central Gunnison and Uncompahgre River Basins as visibilities dropped below a quarter mile, including at the Blake Field Airport in Delta.
Dense fog occurred across portions of the Grand Valley, especially in Fruita along the Colorado River. NWS employees estimated visibilities dropped to less than a quarter mile.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2018Every state in 2018This day in weather historyWarnings in Colorado, December 2018
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: 790623, 790622.