Dense Fog in Maryland

Events

1,086

Deaths

2

Injuries

38

Damage

None recorded

• Dense Fog in Maryland, October 31, 19971 death · 30 injured · 1 eventA tractor trailer collided with a crowded school bus in patchy dense fog and killed the bus' 61-year-old male driver and injured 30 students. The bus was crossing U.S. Route 50 in Easton at 730 a.m. EST when it was hit on the driver's side, nearly severing it in half.
• Dense Fog in Maryland, November 29, 20061 death · 11 eventsDense fog occurred on the morning of the 29th across much of the Mid Atlantic.
• Tornadoes and Damaging Wind in Maryland, November 5, 2003$1.2 million · F1 · 5 eventsA tornadic thunderstorm produced a pair of weak tornadoes across Northern Virginia before crossing into Maryland on the 5th. Once in Maryland, the first tornado produced scattered damage in rural areas between the Potomac River and Poolesville.
• Dense Fog in Maryland, June 25, 19988 injured · 1 eventSome patchy dense fog caused several chain reaction accidents around the intersection of U.S. Route 50 and Maryland State Route 404. Six accidents that involved eighteen vehicles occurred within a 200 yard area and caused eight injuries and five hospitalizations.
• Dense Fog in Maryland, February 23 to 24, 201816 eventsAn unusually moist air mass and light winds led to areas of dense fog.
• Dense Fog in Maryland, January 3 to 4, 202015 eventsLight winds beneath a subsidence inversion atop saturated ground led to the formation of fog across central MD. Visibilities were around a quarter of a mile.
• Dense Fog in Maryland, February 23, 200614 eventsAreas of dense fog occurred during the early morning.
• Dense Fog in Maryland, December 9 to 10, 201214 eventsHigh pressure across most of the Northeast and Mid Atlantic led to the development of dense fog across the region. Light winds and saturated low levels aided in fog development.
• Dense Fog in Maryland, January 12 to 14, 201314 eventsHigh pressure was centered off the Atlantic coast. Southerly flow has transported mild temperatures and moisture northward into the Mid Atlantic Region. Calm winds and low level moisture led to dense fog overnight. This was the second consecutive day of dense fog in the region.
• Dense Fog in Maryland, December 23 to 24, 201414 eventsHigh 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.
• Dense Fog in Maryland, October 22, 202014 eventsAreas of dense fog developed across the region after midnight on the 22nd, with widespread visibility below 1/4 mile. The fog dissipated by 11 AM.
• Dense Fog in Maryland, October 21, 202014 eventsLight winds and plentiful low level moisture led to widespread dense fog. The fog dissipated towards late morning.
• Dense Fog in Maryland, March 24 to 25, 202114 eventsLight winds and plentiful low level moisture allowed areas of dense fog to form late on the 24th. The fog dissipated just after dawn on the 25th.
• Dense Fog in Maryland, March 24 to 25, 200713 eventsSaturated ground and light winds allowed dense fog to develop. Automated surface observations reported visibilities of a quarter mile or less during the late evening hours of March 24th through mid morning on March 25th.
• Dense Fog in Maryland, February 25 to 26, 201813 eventsAn unusually moist air mass and light winds led to areas of dense fog.
• Dense Fog in Maryland, December 28 to 29, 201813 eventsClearing skies, falling temperatures, and abundant low level moisture led to the formation of dense fog.
• Dense Fog in Maryland, May 2, 201913 eventsWarm, moist air aloft overrunning cooler surface air combined with lingering low level moisture to produce low clouds and widespread dense fog across portions of the region.
• Dense Fog in Maryland, October 23, 202013 eventsAreas of dense fog developed across the region after midnight on the 23rd, with widespread visibility below 1/4 mile. The fog dissipated by 10 AM.
• Dense Fog in Maryland, March 29 to 30, 202013 eventsDense fog developed across much of the state of Maryland within a marine layer situated to the north of an area of low pressure.
• Dense Fog in Maryland, January 13, 200612 eventsAreas of dense fog occurred early in the morning of January 13 across the region.
• Dense Fog in Maryland, December 14, 200612 eventsDense fog formed on the morning of the 14th across the Mid Atlantic.
• Dense Fog in Maryland, December 1 to 2, 201212 eventsHigh pressure was moving off the Mid Atlantic coast overnight. Abundant low level moisture and light winds contributed to fog development across the region.
• Dense Fog in Maryland, October 8, 201812 eventsHigh levels of moisture combined with clear skies to create areas of fog, some of which became locally dense.
• Dense Fog in Maryland, December 17, 201912 eventsMoisture underneath a subsidence inversion resulted in areas of dense fog. Visibility was around one-quarter mile.
• Dense Fog in Maryland, January 14 to 15, 202012 eventsMoist air at low levels was trapped beneath a subsidence inversion and winds went calm as high pressure moved overhead, leading to the formation of fog across much of central and western Maryland. Visibilities were around a quarter of a mile.

Dense Fog everywhereEvery kind of event in Maryland

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.