Dense Fog, Clarke
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Clarke forecast zone
- Reported by
- AWOS
- Coordinates
- 39.112, -77.997 (the zone’s center; the record gives no point)
Dense Fog in Virginia, December 17, 2019
Moisture underneath a subsidence inversion resulted in areas of dense fog. Visibility was around one-quarter mile.
Where it happened
Every event with a place to put it; 16 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 17
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.
What happened
The episode as NWS LWX wrote it up.
Moisture underneath a subsidence inversion resulted in areas of dense fog. Visibility was around one-quarter mile.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Dec 16, 3:28 PM EST, 21 hours 32 minutes earlier.
Area forecast discussion, Dec 16, 3:28 PM EST, 21 hours 32 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Dec 16, 4:32 PM EST, 20 hours 28 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The radar
The national radar mosaic for the moment the first event began.
Event by event
17 dense fog. Local standard time, as filed.
Dense Fog, Albemarle
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Albemarle forecast zone
- Reported by
- AWOS
- Coordinates
- 38.029, -78.477 (the zone’s center; the record gives no point)
Dense Fog, Greene
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Greene forecast zone
- Reported by
- AWOS
- Coordinates
- 38.298, -78.467 (the zone’s center; the record gives no point)
Dense Fog, Madison
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Madison forecast zone
- Reported by
- AWOS
- Coordinates
- 38.414, -78.279 (the zone’s center; the record gives no point)
Dense Fog, Rappahannock
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Rappahannock forecast zone
- Reported by
- AWOS
- Coordinates
- 38.685, -78.159 (the zone’s center; the record gives no point)
Dense Fog, Orange
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Orange forecast zone
- Reported by
- AWOS
- Coordinates
- 38.246, -78.013 (the zone’s center; the record gives no point)
Dense Fog, Culpeper
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Culpeper forecast zone
- Reported by
- AWOS
- Coordinates
- 38.486, -77.956 (the zone’s center; the record gives no point)
Dense Fog, Prince William
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Prince William forecast zone
- Reported by
- AWOS
Dense Fog, Fairfax
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Fairfax forecast zone
- Reported by
- AWOS
- Coordinates
- 38.841, -77.291 (the zone’s center; the record gives no point)
Dense Fog, Arlington
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Arlington forecast zone
- Reported by
- AWOS
- Coordinates
- 38.855, -77.106 (the zone’s center; the record gives no point)
Dense Fog, Stafford
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Stafford forecast zone
- Reported by
- AWOS
- Coordinates
- 38.421, -77.457 (the zone’s center; the record gives no point)
Dense Fog, Spotsylvania
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Spotsylvania forecast zone
- Reported by
- AWOS
- Coordinates
- 38.244, -77.558 (the zone’s center; the record gives no point)
Dense Fog, King George
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- King George forecast zone
- Reported by
- AWOS
- Coordinates
- 38.274, -77.156 (the zone’s center; the record gives no point)
Dense Fog, Northern Fauquier
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Northern Fauquier forecast zone
- Reported by
- AWOS
- Coordinates
- 38.739, -77.809 (the zone’s center; the record gives no point)
Dense Fog, Southern Fauquier
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Southern Fauquier forecast zone
- Reported by
- AWOS
- Coordinates
- 38.739, -77.809 (the zone’s center; the record gives no point)
Dense Fog, Eastern Loudoun
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Eastern Loudoun forecast zone
- Reported by
- AWOS
- Coordinates
- 39.091, -77.636 (the zone’s center; the record gives no point)
Dense Fog, Western Loudoun
- When
- December 17, 1:00 PM EST to 3:00 PM EST
- Where
- Western Loudoun forecast zone
- Reported by
- AWOS
- Coordinates
- 39.091, -77.636 (the zone’s center; the record gives no point)
What these are
- 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.
The same day elsewhere
- Tornadoes and Damaging Winds in Georgia, December 17, 2019
- High Wind and Strong Wind in California, December 17, 2019
- Tornado and Damaging Winds in Alabama, December 17, 2019
- Dense Fog in Maryland, December 17, 2019
- High Wind in California, December 17, 2019
- Flooding in West Virginia, December 17, 2019
- Winter Weather in Pennsylvania, December 17, 2019
- Marine Thunderstorm Winds in Gulf of Mexico, December 17, 2019
- Winter Weather in Vermont, December 17, 2019
- Winter Weather and Astronomical Low Tide in Ohio, December 17, 2019
- Dense Fog in West Virginia, December 17, 2019
- Damaging Winds in Georgia, December 17, 2019
More
Every storm in Virginia in 2019Every state in 2019This day in weather historyWarnings in Virginia, December 2019
Sources
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 2026-09-24. Each event’s entry at NCEI: 870013, 870014, 870015, 870016, 870017, 870018, 870019, 870020, 870021, 870022, 870023, 870024, 870025, 870026, 870027, 870028, 870029.