Colorado, 2019

Dense Fog in Colorado, December 9, 2019

December 9, 2019 · NWS GJT · 1 event in 1 county or zone

Trapped low level moisture led to areas of dense fog in the Grand Valley.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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.

What happened

The episode as NWS GJT wrote it up.

Trapped low level moisture led to areas of dense fog in the Grand Valley.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 dense fog. Local standard time, as filed.

Dense Fog, Grand Valley

When
December 9, 12:00 AM MST to 11:00 AM MST
Where
Grand Valley forecast zone
Reported by
ASOS
Coordinates
39.308, -108.185 (the zone’s center; the record gives no point)

Dense fog was observed across the Grand Valley including at the Grand Junction Regional Airport as visibility was reduced to less than one quarter of a mile for several hours.

What these are

Dense Fog
Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Colorado in 2019Every state in 2019This day in weather historyWarnings in Colorado, December 2019

Sources

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: 861336.