Utah, 2010

Dense Fog in Utah, January 28 to 29, 2010

January 28 to 29, 2010 · NWS GJT · 3 events in 3 counties and zones

Dense fog formed across the lower valleys of eastern Utah and western Colorado as clearing skies combined with low-level moisture provided by recent precipitation.

Where it happened

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.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
3

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.

Dense fog formed across the lower valleys of eastern Utah and western Colorado as clearing skies combined with low-level moisture provided by recent precipitation.

The radar

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

Open the radar archive at this moment

Event by event

3 dense fog. Local standard time, as filed.

Dense Fog, Grand Flat and Arches

When
January 28, 3:30 PM MST to January 29, 1:00 PM MST
Where
Grand Flat and Arches forecast zone
Reported by
Trained Spotter
Coordinates
38.982, -109.570 (the zone’s center; the record gives no point)

Visibilities were frequently reduced to below one-quarter mile, especially along Interstate 70 and Highway 191.

Dense Fog, Southeast Utah

When
January 28, 7:00 PM MST to January 29, 7:00 AM MST
Where
Southeast Utah forecast zone
Reported by
Trained Spotter
Coordinates
37.626, -109.805 (the zone’s center; the record gives no point)

Visibilities were frequently reduced to near one-half mile, especially along the San Juan River basin.

Dense Fog, Eastern Uinta Basin

When
January 28, 11:30 PM MST to January 29, 12:00 PM MST
Where
Eastern Uinta Basin forecast zone
Reported by
ASOS
Coordinates
40.125, -109.518 (the zone’s center; the record gives no point)

Visibilities were frequently reduced to below one-quarter mile.

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 Utah in 2010Every state in 2010This day in weather historyWarnings in Utah, January 2010

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: 210393, 210394, 210392.