Significant boundary layer moisture was present across most of the area, especially across most of south-central Arizona,  due to the rainfall event that occurred during the 3rd and 4th, which resulted in wet soils. The moisture present combined with clearing skies and nearly calm winds led to temperatures to cool enough that near ground-level saturation was reached. This resulted in the development of widespread dense fog with many weather stations as well as the public reporting visibilities of a quarter of a mile or less at times from the evening of the 4th through morning hours of the 5th.

Dense Fog in SCOTTSDALE/PARADISE VALLEY, ARIZONA
From 05-DEC-22 06:10:00 to 05-DEC-22 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Visibility of less than 1/4 mile was reported in the area of McDowell Road near Indian Bend Wash from dense fog. No accidents or injuries were reported.

Dense Fog in EAST VALLEY, ARIZONA
From 05-DEC-22 05:54:00 to 05-DEC-22 06:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility of around 1/4 mile reported at the Mesa-Falcon Field Airport from dense fog. No accidents or injuries were reported.

Dense Fog in EAST VALLEY, ARIZONA
From 05-DEC-22 07:03:00 to 05-DEC-22 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Visibility of less than 1/4 mile reported in the area of Baseline and Cooper Roads from dense fog. No accidents or injuries were reported.

Dense Fog in YUMA, ARIZONA
From 05-DEC-22 08:26:00 to 12-DEC-22 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Visibility as low as 300-400 yards was reported in Yuma from dense fog. No accidents or injuries were reported.

Dense Fog in NORTHWEST PINAL COUNTY, ARIZONA
From 04-DEC-22 20:47:00 to 05-DEC-22 08:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility of less than 1/4 mile was reported at the Casa Grande Municipal Airport from dense fog. No accidents or injuries were reported.

Dense Fog in NORTHWEST PINAL COUNTY, ARIZONA
From 04-DEC-22 21:35:00 to 05-DEC-22 07:15:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility of less than 1/4 mile was reported at the Coolidge Municipal Airport from dense fog. No accidents or injuries were reported.

Dense Fog in APACHE JUNCTION/GOLD CANYON, ARIZONA
From 05-DEC-22 06:00:00 to 05-DEC-22 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Visibility of less than 1/4 mile reported in Apache Junction from dense fog. No accidents or injuries were reported.

Dense Fog in CENTRAL PHOENIX, ARIZONA
From 05-DEC-22 03:20:00 to 05-DEC-22 05:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility of 1/4 mile was reported at Phoenix Sky Harbor Airport from dense fog. No accidents or injuries were reported.

Dense Fog in BUCKEYE/AVONDALE, ARIZONA
From 04-DEC-22 23:55:00 to 05-DEC-22 10:55:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visibility of less than 1/4 mile reported at the Buckeye Municipal Airport from dense fog. No accidents or injuries were reported.

Dense Fog in SCOTTSDALE/PARADISE VALLEY, ARIZONA
From 05-DEC-22 04:26:00 to 05-DEC-22 07:53:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility of less than 1/4 mile reported at the Scottsdale Airport from dense fog. No accidents or injuries were reported.

Dense Fog in SCOTTSDALE/PARADISE VALLEY, ARIZONA
From 05-DEC-22 05:49:00 to 05-DEC-22 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Visibility of less than 1/4 mile reported in the area of Paradise Valley from dense fog. No accidents or injuries were reported.

Dense Fog in DEER VALLEY, ARIZONA
From 05-DEC-22 07:05:00 to 05-DEC-22 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Visibility of 1/4 mile reported at the Deer Valley Municipal Airport from dense fog. No accidents or injuries were reported.