Colorado, 2023

Dense Fog in Colorado, February 2, 2023

February 2, 2023 · NWS GJT · 1 event in 1 county or zone

Low level moisture remained trapped across northwest Colorado. This led to the development of dense fog across the Central Yampa River Basin.

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.

Low level moisture remained trapped across northwest Colorado. This led to the development of dense fog across the Central Yampa River Basin.

What forecasters said that day

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 Feb 1, 4:22 PM MST, 16 hours 38 minutes earlier.

Area forecast discussion, Feb 1, 4:22 PM MST, 16 hours 38 minutes before
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The radar

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

Open the radar archive at this moment

Event by event

1 dense fog. Local standard time, as filed.

Dense Fog, Central Yampa River Basin

When
February 2, 9:00 AM MST to 11:00 AM MST
Where
Central Yampa River Basin forecast zone
Reported by
ASOS
Coordinates
40.361, -107.805 (the zone’s center; the record gives no point)

Dense fog was observed across the Central Yampa River Basin including at the Craig-Moffat County Airport as visibility was reduced to less than one quarter of a mile for a couple of 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 2023Every state in 2023This day in weather historyWarnings in Colorado, February 2023

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: 1068526.