High pressure over the region resulted in light and variable winds. Moisture advection from a coastal low pressure combining with the light winds resulted in an extended period of dense fog.
Every event with a place to put it; 14 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS LWX wrote it up.
High pressure over the region resulted in light and variable winds. Moisture advection from a coastal low pressure combining with the light winds resulted in an extended period of dense fog.
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 23, 3:56 AM EST, 49 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
14 dense fog. Local standard time, as filed.
HGR and surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
FDK and surrounding counties reported visibilities of one-quarter mile.
BWI, NAK and surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
DMW and surrounding counties reported visibilities of one-quarter mile.
GAI reported visibilities of one-quarter mile. Cigs hovered around 300 ft throughout the time period resulting in dense fog at elevations above 300 ft.
Surrounding counties reported visibilities of one-quarter mile.
GAI reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
Surrounding counties reported visibilities of one-quarter mile.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2014Every state in 2014This day in weather historyWarnings in Maryland, December 2014
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: 552631, 552629, 552630, 552634, 552635, 552636, 552637, 552632, 552638, 552639, 552640, 552641, 552642, 552659.