Winter Storm and Winter Weather in Maryland, March 9, 1999

Name: Winter Storm and Winter Weather in Maryland, March 9, 1999
Start: 1999-03-09T02:00
End: 1999-03-09T23:59
Location: Maryland

March 9, 1999 · NWS LWX · 13 events in 13 counties and zones

Where it happened

Every event with a place to put it; 10 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 13

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.

An area of low pressure moved from the Ohio Valley to North Carolina from late on the 8th through the evening of the 9th. Heavy snow fell across Western and Central Maryland as the storm system moved through. Snowfall rates were in excess of 1 1/2 inches per hour in some locations during the storm. By the evening of the 9th, 6 to 10 inches had fallen in Prince Georges, Montgomery, and Allegany County; 4 to 8 inches had fallen across Washington, Southern Frederick, Howard, Anne Arundel, Charles and Calvert County; 2 to 5 inches had fallen across St. Mary's, Northern Frederick, Carroll, and Southern Baltimore County, including Baltimore City; and 2 inches or less had fallen across Northern Baltimore County. Travel was treacherous across the region on the 9th. The Maryland State Police received 70 accident reports between 11:00 am and 3:00 pm. Over 275 accidents occurred in Anne Arundel County during the storm, resulting in 16 injuries. Whiteout conditions were reported on Route 27 in Carroll County. Two buses were in accidents in Frederick County. A motorist was killed in a car accident on Route 107 in Montgomery County. Another motorist was killed on Branch Avenue in Prince Georges County when she was hit by a car while inspecting damage to her car from a separate collision. Charles County reported 120 accidents in 6 hours, including one crash involving a school bus. Calvert County reported 91 crashes with 9 injuries, including a 6 car pileup near Lusby. After the snow ended, one man died from a heart attack in Prince Georges County after shovelling snow, and two others were admitted to hospitals suffering from chest pains.

The radar

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

Open the radar archive at this moment

Event by event

10 winter storm, 3 winter weather. Local standard time, as filed.

Winter Storm, Allegany

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Allegany forecast zone
Reported by: NEWSPAPER

Winter Storm, Washington

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Washington forecast zone
Reported by: NEWSPAPER
Coordinates: 39.604, -77.814 (the zone’s center; the record gives no point)

Winter Storm, Frederick

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Frederick forecast zone
Reported by: NEWSPAPER
Coordinates: 39.472, -77.398 (the zone’s center; the record gives no point)

Winter Storm, Montgomery

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Montgomery forecast zone
Reported by: NEWSPAPER

Winter Storm, Howard

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Howard forecast zone
Reported by: NEWSPAPER

Winter Storm, Anne Arundel

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Anne Arundel forecast zone
Reported by: NEWSPAPER
Coordinates: 38.994, -76.568 (the zone’s center; the record gives no point)

Winter Storm, Prince Georges

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Prince Georges forecast zone
Reported by: NEWSPAPER
Coordinates: 38.830, -76.847 (the zone’s center; the record gives no point)

Winter Storm, Charles

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Charles forecast zone
Reported by: NEWSPAPER
Coordinates: 38.474, -77.013 (the zone’s center; the record gives no point)

Winter Storm, Calvert

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: Calvert forecast zone
Reported by: NEWSPAPER
Coordinates: 38.535, -76.531 (the zone’s center; the record gives no point)

Winter Storm, St. Mary'S

When: March 9, 2:00 AM EST to 11:59 PM EST
Where: St. Mary'S forecast zone
Reported by: NEWSPAPER
Coordinates: 38.216, -76.529 (the zone’s center; the record gives no point)

Winter Weather, Carroll

When: March 9, 6:00 AM EST to 11:59 PM EST
Where: Carroll forecast zone
Reported by: NEWSPAPER
Coordinates: 39.563, -77.022 (the zone’s center; the record gives no point)

Winter Weather, Northern Baltimore

When: March 9, 6:00 AM EST to 11:59 PM EST
Where: Northern Baltimore forecast zone
Reported by: NEWSPAPER
Coordinates: 39.443, -76.616 (the zone’s center; the record gives no point)

Winter Weather, Southern Baltimore

When: March 9, 6:00 AM EST to 11:59 PM EST
Where: Southern Baltimore forecast zone
Reported by: NEWSPAPER
Coordinates: 39.367, -76.614 (the zone’s center; the record gives no point)

What these are

Winter Storm: A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
Winter Weather: Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Maryland in 1999 Every state in 1999 This day in weather history Warnings in Maryland, March 1999

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: 5686795, 5686796, 5686797, 5686798, 5686799, 5686800, 5686801, 5686802, 5686803, 5686804, 5686805, 5686806, 5686807.