Dense Fog — Greater Phoenix Area, Arizona

2015-01-14 · Greater Phoenix Area, Arizona

Event narrative

Areas of dense fog developed during the morning hours on January 14th across the very far southeastern portion of the greater Phoenix metropolitan area. Visibilities dropped below one quarter of a mile at times and led to hazardous driving conditions for area motorists, especially in communities such as Chandler and Chandler Heights. At 0725MST, a trained weather spotter reported visibility less than one quarter mile along Higley Road in Chandler Heights.

Wider weather episode

On the morning of January 14th, considerable low level moisture lingered across the south central deserts following the passage of a wet winter weather system. Clear skies and light winds allowed areas of dense fog to develop, primarily across portions of western Pinal county. Some of the densest fog affected the areas around and to the south of Casa Grande; visibilities dropped well below one quarter of a mile and created very hazardous driving conditions. A serious automobile accident occurred in Casa Grande as a result of the dense fog, resulting in 2 fatalities and 2 injuries. A Dense Fog Advisory was issued for northwest Pinal county from 0500MST until 0900MST which included the community of Casa Grande.

Source: NOAA Storm Events Database, event_id 548525. Narrative written by the NWS forecast office that issued the report.