Virginia, 2018Dense Fog in Virginia, September 11, 2018
September 11, 2018 · NWS LWX · 6 events in 6 counties and zones
A combination of cold air damming, abundant low level moisture, and light winds led to the formation of fog, some of which became dense with visibility less than a quarter of a mile.
Every event with a place to put it; 5 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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- Floods
- Wind
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- Heat and drought
- Cold
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 6
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 combination of cold air damming, abundant low level moisture, and light winds led to the formation of fog, some of which became dense with visibility less than a quarter of a mile.
Dense Fog, Fairfax
- When
- September 11, 1:52 AM EST to 4:49 AM EST
- Where
- Fairfax forecast zone
- Reported by
- ASOS
- Coordinates
- 38.841, -77.291 (the zone’s center; the record gives no point)
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
Dense Fog, Arlington
- When
- September 11, 1:52 AM EST to 4:49 AM EST
- Where
- Arlington forecast zone
- Reported by
- ASOS
- Coordinates
- 38.855, -77.106 (the zone’s center; the record gives no point)
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
Dense Fog, Prince William
- When
- September 11, 4:55 AM EST to 8:15 AM EST
- Where
- Prince William forecast zone
- Reported by
- AWOS
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
Dense Fog, Stafford
- When
- September 11, 4:55 AM EST to 8:15 AM EST
- Where
- Stafford forecast zone
- Reported by
- AWOS
- Coordinates
- 38.421, -77.457 (the zone’s center; the record gives no point)
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
Dense Fog, Southern Fauquier
- When
- September 11, 4:55 AM EST to 8:15 AM EST
- Where
- Southern Fauquier forecast zone
- Reported by
- AWOS
- Coordinates
- 38.739, -77.809 (the zone’s center; the record gives no point)
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
Dense Fog, Eastern Loudoun
- When
- September 11, 4:55 AM EST to 8:15 AM EST
- Where
- Eastern Loudoun forecast zone
- Reported by
- AWOS
- Coordinates
- 39.091, -77.636 (the zone’s center; the record gives no point)
Observations from around the area indicate visibility fell to a quarter of a mile or less in dense fog.
- 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.
- Flash Flooding in Texas, September 11, 2018$100,000 · 2 events
- Flash Flooding and Debris Flow in Hawaii, September 11 to 13, 2018$18,000 · 24 events
- Flash Flooding in Virginia, September 11 to 12, 2018$50,000 · 2 events
- Flooding in Indiana, September 11 to 19, 2018$30,000 · 4 events
- High Surf in Hawaii, September 11 to 14, 201810 events
- Dense Fog in Maryland, September 11, 20187 events
- Hail and Damaging Wind in North Dakota, September 11, 20181.25 in hail · 7 events
- High Wind in California, September 11 to 12, 201858 kt wind · 4 events
- Hail in Minnesota, September 11, 20181.25 in hail · 2 events
- Flash Flooding in Virginia, September 11, 20182 events
- Dense Fog in District of Columbia, September 11, 20181 event
- Flash Flood in Delaware, September 11, 20181 event
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 2026-09-30. Each event’s entry at NCEI: 784455, 784456, 784451, 784452, 784453, 784454.