West Virginia, 2011

Dense Fog in West Virginia, September 23, 2011

September 23, 2011 · NWS LWX · 2 events in 2 counties and zones

High pressure just off the Mid-Atlantic Coast caused a southerly flow to usher in plenty of low-level moisture across the area. Winds were light enough during the early morning hours for areas of dense fog to develop.

Where it happened

Every event with a place to put it; 2 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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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

High pressure just off the Mid-Atlantic Coast caused a southerly flow to usher in plenty of low-level moisture across the area. Winds were light enough during the early morning hours for areas of dense fog to develop.

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 Sep 23, 3:00 AM EST, 36 minutes earlier.

Area forecast discussion, Sep 23, 3:00 AM EST, 36 minutes before
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Hazardous weather outlook, Sep 23, 1:05 AM EST, 2 hours 31 minutes before
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In the hours before

Special weather statement, Sep 23, 1:02 AM EST, 2 hours 34 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 dense fog. Local standard time, as filed.

Dense Fog, Berkeley

When
September 23, 3:36 AM EST to 7:00 AM EST
Where
Berkeley forecast zone
Reported by
ASOS
Coordinates
39.464, -78.027 (the zone’s center; the record gives no point)

Visibility was reported to be around one quarter mile.

Dense Fog, Jefferson

When
September 23, 3:36 AM EST to 7:00 AM EST
Where
Jefferson forecast zone
Reported by
Unknown
Coordinates
39.308, -77.863 (the zone’s center; the record gives no point)

Visibility was estimated to be around one quarter mile based on observations nearby.

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

More

Every storm in West Virginia in 2011Every state in 2011This day in weather historyWarnings in West Virginia, September 2011

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 2026-10-01. Each event’s entry at NCEI: 347966, 347967.