Arizona, 2014Dense Fog in Arizona, December 4 to 9, 2014
December 4 to 9, 2014 · NWS FGZ · 11 events in 7 counties and zones
Widespread light to moderate rain (over two inches in places) over a two day period (December 4-5) was followed by a large area of high pressure. This created inversions that lead to the widespread development of fog and often dense fog.
Every event with a place to put it; 11 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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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 11
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.
Widespread light to moderate rain (over two inches in places) over a two day period (December 4-5) was followed by a large area of high pressure. This created inversions that lead to the widespread development of fog and often dense fog. The time of dense fog development and dissipation was difficult to forecast and record. The entire Grand Canyon was filled with low clouds at times while the Grand Canyon Airport 7 miles away was clear. Some ASOS locations were under low clouds while fog impacted highways and freeways just a few miles away.
Dense Fog, Grand Canyon Country
- When
- December 4, 9:00 PM MST to December 5, 2:00 AM MST
- Where
- Grand Canyon Country forecast zone
- Reported by
- ASOS
- Coordinates
- 35.839, -111.770 (the zone’s center; the record gives no point)
The ASOS at the Grand Canyon Airport reported dense fog between 900 PM and 200 AM.
Dense Fog, Little Colorado River Valley in Navajo County
- When
- December 5, 4:30 AM MST to 9:00 AM MST
- Where
- Little Colorado River Valley in Navajo County forecast zone
- Reported by
- ASOS
- Coordinates
- 35.400, -110.321 (the zone’s center; the record gives no point)
The ASOS at the Winslow Airport reported fog between 1/4 and 1/2 mile from around 430 AM to 9 AM.
Dense Fog, Little Colorado River Valley in Navajo County
- When
- December 6, 5:30 AM MST to 6:30 AM MST
- Where
- Little Colorado River Valley in Navajo County forecast zone
- Reported by
- ASOS
- Coordinates
- 35.400, -110.321 (the zone’s center; the record gives no point)
The Winslow Airport ASOS reported dense fog between 530 and 630 AM.
Dense Fog, Western Mogollon Rim
- When
- December 6, 8:30 PM MST to December 7, 12:00 AM MST
- Where
- Western Mogollon Rim forecast zone
- Reported by
- ASOS
- Coordinates
- 35.839, -111.770 (the zone’s center; the record gives no point)
Dense fog was reported at the Flagstaff Airport from about 830 PM to Midnight. Ice fog was reported around midnight as well.
Dense Fog, White Mountains
- When
- December 7, 4:30 AM MST to December 8, 11:00 AM MST
- Where
- White Mountains forecast zone
- Reported by
- ASOS
- Coordinates
- 35.398, -109.905 (the zone’s center; the record gives no point)
The Show Low Airport reported dense fog between 400 AM and 1100 AM on the 7th and again from 700 PM on the 7th to 1100 AM on the 8th.
Dense Fog, Chuska Mountains and Defiance Plateau
- When
- December 7, 7:00 PM MST to December 8, 12:00 AM MST
- Where
- Chuska Mountains and Defiance Plateau forecast zone
- Reported by
- Public
- Coordinates
- 35.396, -109.489 (the zone’s center; the record gives no point)
Dense fog was reported along Highway 264.
Dense Fog, Little Colorado River Valley in Navajo County
- When
- December 7, 7:30 PM MST to 9:30 PM MST
- Where
- Little Colorado River Valley in Navajo County forecast zone
- Reported by
- ASOS
- Coordinates
- 35.400, -110.321 (the zone’s center; the record gives no point)
The Winslow ASOS reported dense fog between 730 PM and 1030 PM.
Dense Fog, Little Colorado River Valley in Apache County
- When
- December 7, 8:30 PM MST to December 8, 2:00 AM MST
- Where
- Little Colorado River Valley in Apache County forecast zone
- Reported by
- ASOS
- Coordinates
- 35.396, -109.489 (the zone’s center; the record gives no point)
The St Johns Airport reported dense fog from around 830 PM on the 7th to around 200 AM on the 8th.
Dense Fog, White Mountains
- When
- December 9, 12:00 AM MST to 9:00 AM MST
- Where
- White Mountains forecast zone
- Reported by
- ASOS
- Coordinates
- 35.398, -109.905 (the zone’s center; the record gives no point)
The visibility dropped to 1/4 mile in fog at the Show Low Airport between midnight and 900 AM.
Dense Fog, Black Mesa Area
- When
- December 9, 1:00 AM MST to 5:00 AM MST
- Where
- Black Mesa Area forecast zone
- Reported by
- Law Enforcement
- Coordinates
- 35.545, -110.527 (the zone’s center; the record gives no point)
Local police reported 1/4 mile visibility in fog in the community of Rough Rock.
Dense Fog, Western Mogollon Rim
- When
- December 9, 3:00 AM MST to 10:00 PM MST
- Where
- Western Mogollon Rim forecast zone
- Reported by
- ASOS
- Coordinates
- 35.839, -111.770 (the zone’s center; the record gives no point)
Fog dropped the visibility at the Flagstaff Airport down to 1/4 mile at times. Most notably in the morning and then again in the evening.
- Dense Fog
- Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
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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: 550490, 550485, 550486, 550491, 550492, 550494, 550487, 550493, 550489, 550495, 550488.