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The Dexes / Dense & Freezing Fog / 930541

Eventdex · Dense & Freezing Fog

SOUTH MOUNTAIN/AHWATUKEE

930541

The record

Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.

Event typeevent_typeDense Fog
NOAA NCEI event IDncei_event_id930,541
Episode IDepisode_id154,444
Begin UTCbegin_utc2020-12-11T12:00:00+00:00
End UTCend_utc2020-12-11T17:00:00+00:00
StatestateARIZONA
County/zone typecz_typeZ
County/zone namecz_nameSOUTH MOUNTAIN/AHWATUKEE
Deaths directdeaths_direct0
Deaths indirectdeaths_indirect0
Injuries directinjuries_direct0
Injuries indirectinjuries_indirect0
Damage propertydamage_property0.00K
Damage cropsdamage_crops0.00K
Weather forecast office sourcewfo_sourceTrained Spotter
Episode narrativeepisode_narrativeBoundary layer moisture remained elevated across the central deserts during the morning hours on December 11th following the passage of a wet winter storm system. As skies cleared and winds became light, the high humidity allowed for the formation of dense fog in portions of the greater Phoenix area, from the west valley southeastward and into the town of Maricopa. More than one trained spotter reported dense fog with visibility below one quarter of a mile; a spotter near the town or Maricopa reported visibility down to 100 feet as seen in a picture. Additionally, the official AWOS weather station at the Goodyear airport measured a visibility to one quarter of a mile at 0605MST. There were no reports of accidents due to the sharply reduced visibilities.
Event narrativeevent_narrativeLow level humidity remained high following the passage of a wet Pacific weather system and as skies cleared and winds became light, conditions became favorable for the development of dense fog across the central portions of the greater Phoenix area on December 11th. According to a trained weather spotter located 6 miles southeast of the Ahwatukee Foothills, at 0532MST dense fog formed with visibility lowering below one quarter of a mile. A Dense Fog Advisory was issued for the area at 0505MST and it remained in effect through 1000MST. There were no reports of any accidents due to the sharply reduced visibility and associated hazardous driving conditions.
Yearyear2,020

Provenance

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Storage: spine

SOUTH MOUNTAIN/AHWATUKEE — Dense & Freezing Fog — TerraPulse