Update at 11:20 a.m. EST Monday:
This blog is no longer live as the severe weather threat has lessened. See a recap of the storm and reports below.
As the storm that sent icy mixes from the Ohio Valley to the mid-Atlantic over the weekend winds down, lingering travel problems continue for a few major roadways and airports.
Schools in Frederick County, Md., were canceled Monday due to the wintry blast, while public schools in Washington, D.C., had a two-hour delay. Meanwhile, thousands of customers in the Washington, D.C., area are without power, following the snow and ice.
"Temperatures are continuing to rise above freezing, so most of the icy threat is over for now," said AccuWeather.com Meterologist Evan Duffey. "There will be some lingering slick spots in some areas."
A fatal crash occurred on the Pennsylvania Turnpike Sunday, killing at least one person. As many as 50 vehicles were involved in the pileup, reported about 12:30 p.m. on Sunday, according to WPVI-TV. The road re-opened more than seven hours later.
10:35 a.m. EST Monday: The Massachusetts Department of Transportation lists icy road conditions across portions of the state, including areas on I-95 and around Boston.
9:40 a.m. EST Monday: FlightStats is listing excessive delays at Philadelphia, Ronald reagan, Washington Dulles airports, significant delays at Richmond, Boston Logan, Albany, Charleston, Charlotte, Cleveland, Cincinnati and Atlanta airports.
9:00 a.m. EST Monday: Dominion Electric customers without power are just under 81,000 in Virginia, with more than 66,000 of those around the DC metro area.
8:30 a.m. EST Monday: Connecticut Department of Transportation lists accidents, icy roads and traffic delays across most of the state, including I-84 and I-95.
8:00 a.m. EST Monday: School delays, cancellations mount in the mid-Atlantic:
DCPS will operate under a two hour delay for students on Monday, 12/9. All DCPS Essential personnel are expected to report on time.— DC Public Schools (@dcpublicschools) December 9, 2013
FCPS Schools are closed due to the weather. All offices are open. Code Blue for employees.— FCPS-MD (@FCPSMaryland) December 9, 2013
7:50 a.m. EST Monday: More than 58,000 Dominion Electric customers are now without power in Virginia, with more than 40,000 in the Washington, D.C., area. Nearly 11,000 Baltimore Gas and Electric customers are without power in Maryland, with 6,592 out in Baltimore County and 2,652 out in Harford County.
7:20 a.m. EST Monday: The Federal Aviation Administration is warning of delays going into Reagan and Philadelphia airports with its second-highest delay rating.
6:50 a.m. EST Monday: Just under 50,000 Dominion Electric customers are without power across Virginia. Most are in the Northern Virginia region, with 36,246 affected.
6:30 a.m. EST Monday: The New York Department of Transportation lists snowy and icy conditions for most of its roads, with some areas only listed as wet as rain falls across parts of the state. The worst conditions are across Saratoga Springs, which are classified as being "severely snow/ice covered."
New York State road conditions map via New York Department of Transportation.
6:00 a.m. EST Monday: FlightStats lists moderate delays out of Washington Dulles, Ronald Reagan and Philadelphia airports.
5:20 a.m. EST Monday: Law enforcement reports 0.25 of an inch of freezing rain in Botetourt, Va.
4:43 a.m. EST Monday: There are nearly 4,000 electric customers without power in Maryland, many of which are located around the Baltimore area.
3:45 a.m. EST Monday: While precipitation has temporarily stopped in Washington, D.C., freezing rain continues around the Philadelphia area.
2:27 a.m. EST Monday: There are currently over 23,000 electric customers without power in Virginia, Dominion Electric reports.
1:17 a.m. EST Monday: Icy conditions continue around Washington, D.C.
12:34 a.m. EST Monday: A 20 car accident has caused part of I-95 southbound to be closed near Greenwich, Conn.
11:23 p.m. EST Sunday: Freezing rain has brought one-quarter inch of ice to Montgomery, Va., NWS employee reports.
10:36 p.m. EST Sunday: Freezing rain has spread across Philadelphia, Washington, D.C. and Baltimore.
9:40 p.m. EST Sunday: Icy conditions reported on U.S. Route 1 at Alexandria, Va., according to Virginia DOT:
9:00 p.m. EST Sunday: Major delays at Philadelphia airport are now cleared, the FAA said.
8:20 p.m. EST Sunday: Delays at Philadelphia airport now up to more than four-and-a-half hours, the FAA reported.
8:00 p.m. EST Sunday: With 8.6 inches of snow, Philadelphia International Airport received more snow today than it did all last winter.
7:41 p.m. EST Sunday: Pennsylvania Turnpike has re-opened westbound between Downingtown and Morgantown after fatal crash, the turnpike commission reports.
7:25 p.m. EST Sunday: Flight delays are almost three hours at O'Hare International Airport, the FAA said.
6:55 p.m. EST Sunday: Illinois Department of Transportation reports that roads are clear of snow and ice in Chicago, though winter conditions are currently affecting much of the state. Roadways in Bloomington, Urbana, Freeport and Rockford are all reported snow and ice covered.
6:50 p.m. EST Sunday: Traffic slowdown with police on scene at I-95 at Melrose Avenue, Philadelphia, PennDOT webcam:
6:30 p.m. EST Sunday: Half inch of ice near Millboro, Va., NWS spotter reports.
6:23 p.m. EST Sunday:Brooklyn Queens Expressway at Metropolitan Avenue, New York City DOT webcam:
6:05 p.m. EST Sunday: The heaviest snow, which hit the Philadelphia area, is pushing offshore with some snow around New York City and Long Island, AccuWeather.com Meteorologist Brian Edwards said. There is a chance of patchy freezing drizzle in eastern Pennsylvania, Washington, D.C., and Baltimore over the next couple hours.
A band of moisture in the Tennessee Valley will move into the mid-Atlantic and southern New England states later tonight, Edwards said. There will be an eventual changeover to rain in Washington, Baltimore, Philadelphia and New York City.
5:50 p.m. EST Sunday: Departure delays of more than one hour continue at Philadelphia, Teterboro and Newark airports, the FAA said. Chicago O'Hare International Airport is experiencing delays averaging 59 minutes.
5:20 p.m. EST Sunday: Ice approaching a quarter inch in Cambridge, Md., 911 call center reports.
4:45 p.m. EST Sunday: Six inches of snow at Wilmington, Del., breaks Dec. 8 record. Old record was 2.9 inches set in 1989, NWS office at Mount Holly, N.J. said.
Business U.S. 13 and East 12th Street, Wilmington, from Delaware DOT webcam:
4:15 p.m. EST Sunday: 11.3 inches of snow at Newark, Del., NWS spotter reports.
Delaware Department of Transportation webcam at DE 4 and Harmony Road, Newark:
4:11 p.m. EST Sunday: Quarter inch of ice at Clintonville, W.Va., NWS spotter reports.
4:05 p.m. EST Sunday: PennDOT urging drivers to reduce speed during storm at I-95 and Columbus Boulevard, Philadelphia.
3:55 p.m. EST Sunday: Half inch of ice at Cumberland, Va., 911 call center reports.
3:35 p.m. EST Sunday: Eight inches of snow at Point of Woods, Camden County, N.J., and 7 inches at Woodbury, Gloucester County, N.J., NWS spotters report.
3:32 p.m. EST Sunday: Departure traffic destined to Teterboro Airport, Teterboro, N.J. is experiencing delays averaging 1 hour and 47 minutes. Departure traffic destined to Philadelphia International Airport will not be allowed to depart until at least 4 p.m., the FAA said.
3:23 p.m. EST Sunday: Freezing rain is now falling on top of the snow in Washington, D.C.
3:18 p.m. EST Sunday: At least one person is dead after a vehicle crash with up to 50 vehicles involved on the Pennsylvania Turnpike near Morgantown, Pa., WPVI-TV is reporting. Eastbound lanes have re-opened, but westbound lanes are still closed, the turnpike commission said.
3:05 p.m. EST Sunday: Washington-Dulles International Airport has more than 280 cancellations or delays, according to FlightStats.
2:50 p.m. EST Sunday: Snow also hampers Baltimore Ravens and Minnesota Vikings at M&T Bank Stadium.
Baltimore Ravens quarterback Joe Flacco, left, hands the ball off to running back Ray Rice as snow falls in the first half of an NFL football game against the Minnesota Vikings, Sunday, Dec. 8, 2013, in Baltimore. (AP Photo/Nick Wass)
2:34 p.m. EST Sunday: The heaviest snow band has shifted out of the Philadelphia area and is now to the south from Elkton, Md., to Barnegat Light, N.J., AccuWeather.com Senior Meteorologist Kristina Pydynowski said. There will be periodic snow through 6 p.m. in the Philadelphia area.
2:24 p.m. EST Sunday: Pennsylvania Turnpike institutes 22-mile detour around the site of a "major accident" between Downingtown and Morgantown, Pa., the turnpike commission said on its website.
2:13 p.m. EST Sunday: Seven inches of snow has fallen at Garnet Valley, Delaware County, Pa., NWS spotter reports.
2:07 p.m. EST Sunday: Pennsylvania Turnpike is closed all lanes between Morgantown and Downingtown, Pa., because of multiple vehicle crashes, the turnpike commission reports.
2:00 p.m. EST Sunday: Slow traffic as road crews work on I-95 south at MD 100, near Baltimore.
1:49 p.m. EST Sunday: 0.25 inches of freezing rain, 8 miles ENE of Fayetteville, W.Va., NWS spotter reports.
1:33 p.m. EST Sunday: Near white-out conditions in Glen Mills, Pa. Photo courtesy of Brian Sloane.
1:28 p.m. EST Sunday: Crashes close the Pennsylvania Turnpike/I-76 in all lanes east and west at Exit 298, near Pottstown, Pa.
1:22 p.m. EST Sunday
Here's your field at The Linc. pic.twitter.com/p5vLCeiOie— Jarrett Bell (@JarrettBell) December 8, 2013
1:10 p.m. Sunday: Heavy snow with quarter mile visibility at Philadelphia International Airport. The snow is coming down during the Philadelphia Eagles NFL game against the Detroit Lions at Lincoln Financial Field.
Detroit Lions' Matthew Stafford yells to his team during the first half of an NFL football game against the Philadelphia Eagles, Sunday, Dec. 8, 2013, in Philadelphia. (AP Photo/Matt Rourke)
1:07 p.m. Sunday: Slow going on the New Jersey Turnpike, north of Delaware Memorial Bridge, turnpike webcam shows.
1:03 p.m. EST Sunday: Ground stop because of weather now at Philadelphia International Airport, FAA reports.
12:56 p.m. EST Sunday: Snow-covered I-95 at Broad Street, Philadelphia, PennDOT webcam shows.
12:52 p.m. EST Sunday: AccuWeather meteorologists expecting 3 to 6 inches of snow in Philadelphia. 2.5 inches of snow at Runnemeade, N.J., SE of Philadelphia.
12:46 p.m. EST Sunday: Airport arrival delay up to 1 hour, 43 minutes at Philadelphia International Airport, FAA reports. Ground stop reported at Ronald Reagan Washington National Airport.
12:35 p.m. EST Sunday: Multiple crashes on Pennsylvania Turnpike/I-76, 276, 476, north of Philadelphia, PennDOT reports.
12:24 p.m. EST Sunday: Five inches of snow fell in Oakland, Md., emergency manager reported.
12:04 p.m. EST Sunday:All southbound lanes of I-95 closed by multi-vehicle crash between South Exit 3 - Highland Ave in Chester, Pa., and South Exit 2 - PA 452/Market Street in Upper Chichester Township, Pa., PennDOT reports.
11:56 a.m. EST Sunday: Stopped traffic on I-95 at Tasker Street, Philadelphia, PennDOT webcam shows.
11:52 a.m. EST Sunday: Multi-vehicle crash on I-95 southbound between South Exit 19 - I-76 East/Walt Whitman Bridge in Philadelphia) and South Exit 17 - PA 611/Broad Street, Pennsylvania Department of Transportation reports.
11:46 a.m. EST Sunday: Visibility is down to zero in Wilmington, Del., from heavy snow.
11:40 a.m. EST Sunday: Departure delays because of the weather are reported at La Guardia, JFK, Newark and Philadelphia airports, the FAA reports.
11:10 a.m. EST Sunday: This Maryland Department of Transportation webcam shows that I-70/I-81 near Hagerstown, Md., is snow-covered and slippery with poor visibility:
11:00 a.m. EST Sunday: Snow is falling in Philadelphia. See the local interactive radar.
10:50 a.m. EST Sunday: The Maryland State Police (MSP) has declared that a snow emergency plan is in place for north central portions of the state, including Westminster, Frederick and Hagerstown. They issued this with input from the Maryland State Highway Administration. Once a snow emergency is declared, the law requires certain precautions:
-Prohibited parking on roads and streets designated as snow emergency routes; and
-The use of snow tires/chains (most cars now use all weather tires, so changing to "snow" tires is unnecessary).
10:30 a.m. EST Sunday: AccuWeather.com meteorologists are concerned for around 3 inches of snow in Philadelphia today; higher amounts will occur westward along the Maryland-Pennsylvania border.
10:10 a.m. EST Sunday: Heavy snow has arrived and is currently reducing the visibility to 1/4 of a mile in Frederick and Westminster, Md.
10:05 a.m. EST Sunday: The West Virginia Department of Transportation reports severe roadway conditions with active snow and ice removal occurring through central portions of the state, where a band of snow is unleashing heavy snow.
9:55 a.m. EST Sunday: Snow is falling heavily across portions of West Virginia, with 5.5 inches of snow piled up northwest of Teays Valley, W.Va, according to an NWS employee.
9:30 a.m. EST Sunday: At 9:15 a.m. EST, 0.2 of an inch of snow was measured 3 miles northwest of Washington's Dulles International Airport.
9:15 a.m. EST Sunday: The Run With Santa 5K in Reston, Va., is occurring with snow falling.
Santa 5K in full effect in snowy conditions! pic.twitter.com/MKOjB2C5Vz— Whitney Eleanor Wild (@WhitneyWReports) December 8, 2013
9:03 a.m. EST Sunday: National Weather Service employee measured 4.8 inches of snow west of Teays Valley, W. Va., located west of Charleston.
8:59 a.m. EST Sunday: An emergency manager reported a quarter-inch of ice on trees in Cobhill, Ky.
8:38 a.m. EST Sunday: Public reports of a light coating of ice on elevated surfaces in Bowling Green, Va., which is located in between Fredericksburg and Richmond.
8:35 a.m. EST Sunday: Snow has reduced visibility to a half-mile at Washington's Dulles International Airport. Virginia DOT cameras showing roads starting to become covered.
Snow in DC! Everybody freak out! pic.twitter.com/3T4OJ6TDQn— Jake Grovum (@jgrovum) December 8, 2013
8:08 a.m. EST Sunday: FlightStats.com reports 191 arriving and departing flights have already been cancelled at Washington's Dulles International Airport.
7:21 a.m. EST Sunday: Heavy icing is causing trees to bend four miles southeast of Bolivar, Tenn., according to a National Weather Service spotter.
7:12 a.m. EST Sunday: A National Weather Service spotter reported a quarter-inch of ice buildup on all trees and nearby roadways 7 miles north of Pembroke, Ky.
7:00 a.m. EST Sunday: Freezing drizzle continues in Dallas, Texas.
6:54 a.m. EST Sunday: Law enforcement dispatch reports numerous accidents across Wichita, Kan., due to freezing drizzle.
Four people in Florida are likely the first in the United States to contract the Zika virus by local mosquitoes, officials said Friday.
Rounds of drenching showers and heavy thunderstorms will heighten the risk of flash flooding across the northeastern United States through the final weekend of July.
Rounds of showers and thunderstorms moving westward off the coast of Africa may pave the way for future tropical systems over the Atlantic Ocean in the weeks ahead.
The Formula One race in Hockenheim, Germany, this weekend could become the third consecutive race to be disrupted by showers and thunderstorms.
Additional downpours are likely to roll across northern New Jersey and could suspend play during the late rounds at the 98th PGA Championship at Baltusrol Golf Club this weekend.
Tropical Depression 06w threatens to bring flooding rain to the Philippines into this weekend with potential future impacts on China and Taiwan.
Stroudsburg, PA (2009)
A tornado downed trees and destroyed four large farm buildings and a single family house. Two injuries were reported.
Flooding in SW Connecticut. Bridgeport gets 11.32" of rain, $250,000 damage.
Burlington, NJ (1925)
Large amount of hail fell and remained on the ground for 3 days.