California, 2017Dense Fog in California, March 11 to 16, 2017
March 11 to 16, 2017 · NWS SGX · 12 events in 4 counties and zones
A sallow marine layer lingered along the coast between the 12th and 16th of March, resulting in night and morning dense fog along the coast of Orange and San Diego Counties.
Every event with a place to put it; 12 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
Open the live radar over this ground
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 12
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.
A sallow marine layer lingered along the coast between the 12th and 16th of March, resulting in night and morning dense fog along the coast of Orange and San Diego Counties.
Dense Fog, San Diego County Coastal Areas
- When
- March 11, 11:45 PM PST to March 12, 8:45 AM PST
- Where
- San Diego County Coastal Areas forecast zone
- Reported by
- ASOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Dense fog developed along the coast late on the 11th and pushed inland overnight. Carlsbad, McClellan-Palomar Airport reported 9 hours of dense fog with a visibility of 1/4 mile or less. Other airports up and down the coast also experienced visibility of 1/4 or less during this period, though San Diego International never dropped below 1/4 mile.
Dense Fog, San Diego County Valleys
- When
- March 12, 6:10 AM PST to 6:50 AM PST
- Where
- San Diego County Valleys forecast zone
- Reported by
- AWOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Dense fog briefly pushed into the western San Diego County Valleys, Gillespie Field Airport reported 1/4 mile or less visibility for about an hour.
Dense Fog, Orange County Coastal
- When
- March 12, 6:20 AM PST to 7:25 AM PST
- Where
- Orange County Coastal forecast zone
- Reported by
- ASOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
John Wayne Airport reported dense fog with a visibility of 1/4 mile.
Dense Fog, Orange County Inland
- When
- March 12, 6:28 AM PST to 7:08 AM PST
- Where
- Orange County Inland forecast zone
- Reported by
- AWOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
Los Alamitos Army Airfield reported a brief period of dense fog with a visibility of 1/4 mile.
Dense Fog, San Diego County Coastal Areas
- When
- March 12, 8:00 PM PST to March 13, 8:00 AM PST
- Where
- San Diego County Coastal Areas forecast zone
- Reported by
- ASOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Areas of dense fog were reported along the coast of San Diego County over a period of 12 hours at multiple ASOS/AWOS sites. Impacts were minimal at San Diego International where visibility only fell to 1/4 mile between 0615 and 0651PST.
Dense Fog, Orange County Coastal
- When
- March 13, 5:00 AM PST to 7:00 AM PST
- Where
- Orange County Coastal forecast zone
- Reported by
- Lifeguard
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
Newport Beach lifeguards reported dense fog with a visibility of 200 ft.
Dense Fog, San Diego County Coastal Areas
- When
- March 13, 6:30 PM PST to March 14, 5:30 AM PST
- Where
- San Diego County Coastal Areas forecast zone
- Reported by
- ASOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Areas of dense fog were reported by multiple ASOS/AWOS stations over a 11 hour period. No significant impacts were reported at San Diego International, though the visibility did drop to 1/4 mile for several hours.
Dense Fog, Orange County Inland
- When
- March 13, 10:48 PM PST to March 14, 8:15 AM PST
- Where
- Orange County Inland forecast zone
- Reported by
- AWOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
Los Alamitos Army Airfield reported periods of dense fog with a visibility of 1/4 mile or over a 9 hour period.
Dense Fog, Orange County Coastal
- When
- March 14, 1:35 AM PST to 7:57 AM PST
- Where
- Orange County Coastal forecast zone
- Reported by
- ASOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
John Wayne Airport reported reported dense fog with a visibility of 1/4 mile or less for more than 6 hours.
Dense Fog, Orange County Coastal
- When
- March 15, 5:45 AM PST to 7:50 AM PST
- Where
- Orange County Coastal forecast zone
- Reported by
- ASOS
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
John Wayne Airport reported 2 hours dense fog with a visibility of 1/4 mile or less. Newport Beach Lifeguards also reported a visibility of 200 ft at 0600PST.
Dense Fog, San Diego County Coastal Areas
- When
- March 16, 1:30 AM PST to 8:30 AM PST
- Where
- San Diego County Coastal Areas forecast zone
- Reported by
- ASOS
- Coordinates
- 33.028, -116.770 (the zone’s center; the record gives no point)
Numerous ASOS and AWOS stations along the San Diego County coast reported visibility of 1/4 mile or less over a 7 hour period. No impacts were reported at San Diego International.
Dense Fog, Orange County Inland
- When
- March 16, 5:00 AM PST to 7:00 AM PST
- Where
- Orange County Inland forecast zone
- Reported by
- Lifeguard
- Coordinates
- 33.677, -117.776 (the zone’s center; the record gives no point)
Newport Beach Lifeguards reported dense fog with a visibility of 200 ft.
- 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.
- Winter Weather in Tennessee, March 11 to 12, 201726 events
- Winter Weather in North Carolina, March 11 to 12, 201718 events
- Winter Weather in Tennessee, March 11, 201717 events
- Heavy Snow and Winter Weather in Arkansas, March 11, 201713 events
- Flash Flood and Hail in Texas, March 11, 2017$12,000 · 1 in hail · 6 events
- Winter Weather in Arkansas, March 11, 20177 events
- Winter Weather in Georgia, March 11 to 12, 20176 events
- Heavy Rain in Hawaii, March 11 to 12, 20173 events
- Winter Weather in Tennessee, March 11 to 12, 20173 events
- Cold in New York, March 11, 20172 events
- Cold in Vermont, March 11, 20172 events
- Winter Weather in Missouri, March 11, 20172 events
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: 687498, 687499, 687496, 687497, 687502, 687501, 687505, 687504, 687503, 687506, 687522, 687509.