Update at 11:30 a.m. EST Sunday:
This blog is no longer live as the severe weather threat has diminished. See a recap of the storm and reports below.
A snowstorm spread eastward over the weekend, burying areas spanning from Missouri to Maine with snow, ice and freezing rain.
The snowstorm impacted cities from Missouri through Pennsylvania on Saturday into Saturday night, including Chicago, Detroit, Cleveland, Pittsburgh, Philadelphia and New York City.
On Saturday, major highways including I-90 in Mass., and I-78 in Pa., reduced roadway speed limits due to the dangerous wintry road conditions. Multiple crashes were reported Saturday around the Detroit area and throughout Pennsylvania.
Some of the Northeast's major airports also experienced delays due to the snow and ice on Saturday, JFK reported excessive delays of more than 2.5 hours and the Philadelphia International Airport had delays of more than an hour. Newark International Airport and Chicago O'Hare also had flight delays and cancellations due to the weather.
The worst of the snowstorm focused on northern New England Sunday, including the cities of Boston, Providence and Burlington. While conditions will gradually improve across New England as the day progresses on Sunday, the threat for icing will remain, as temperatures are expected to drop through the remainder of the weekend.
While the threat of this system has diminished, another system will return snow to the Great Lakes and Northeast Monday through Tuesday night. This event could result in more disruptive snow across eastern New England. For more information stay tuned to AccuWeather.com. Read below for the latest reports on the weekend's snowstorm.
10:43 a.m. EST Sunday: All lanes are now clear along Route 128 north near Dedham, Mass. Road crews continue to clear and treat roadways around the Boston area. MassDOT urges drivers to use caution, as roads are still snow-covered with patches of ice and slush.
10 a.m. EST Sunday: Freezing drizzle could cause some slick spots in Columbus, Ohio, this morning.
9:53 a.m. EST Sunday:
Traffic Alert: Dedham - Rt 128 north at exit 17, accident, road closed.— Mass. Transportation (@MassDOT) December 15, 2013
9:00 a.m. EST Sunday: Boston Logan International Airport has had more than 120 delays and cancellations this morning on both arriving and departing flights, according to FlightStats.
8:28 a.m. EST Sunday: Arctic air is pressing into the Boston area, threatening to cause wet and slushy areas to rapidly freeze and turn icy. Bridges and overpasses will be the first to become slippery.
8:09 a.m. EST Sunday: Sitting is at the top of the snowstorm's totals list is the 17.0 inches measured by a WeatherNet6 volunteer weather watcher in Landgrove, Vt.
8:01 a.m. EST Sunday: Heavy snow has dropped visibility in Portland, Maine, to a quarter-mile.
7:58 a.m. EST Sunday: A substantial amount of snow still covers lengthy stretches of interstates across New York, according to the following map courtesy of the New York Sate Department of Transportation.
7:47 a.m. EST Sunday: Snowfall has already amounted to 13.3 inches near Kennebunk, Maine.
7:30 a.m. EST Sunday: The official snowfall total for Boston was recorded as 4.2 inches. North of the city, 12.0 inches was measured in Groveland, Mass.
6:53 a.m. EST Sunday: Snow has accumulated over an inch is places around Albany, N.Y. following heavy snow overnight. WeatherNet6 reports 14 inches of snow in South Berne so far.
6:10 a.m. EST Sunday: Snow is spread across much of northern New England this morning.
5:05 a.m. EST Sunday: It is currently snowing with a temperatures of only 6 F in Augusta, Maine.
3:48 a.m. EST Sunday: The combination of heavy snow and gusty winds have reduced the visibility to just a few hundred feet near Rutland, Vt.
3:30 a.m. EST Sunday: Visibility has been reduced to near zero around Albany, N.Y., due to a band of heavy snow with snowfall rates of up to 3 inches per hour possible.
2:19 a.m. EST Sunday: At least 9 inches of snow has fallen in Freehold, N.Y., just south of Albany, NWS spotter reports. Snow is still falling heavily around the Albany area.
1:21 a.m. EST Sunday:The number of severely snow covered roads has increased dramatically over the past several hours, according to New York DOT map:
12:14 a.m EST Sunday:PennDOT has lifted the speed limit restrictions on all roadways in south-central Pennsylvania. This includes Interstates 78, 81, 83 and 283.
11:05 p.m. EST Saturday:Central Park as received 5 inches of snow with snow beginning to change over to rain.
10:09 p.m. EST Saturday:9 inches of snow has been reported by an NWS spotter in Broome, N.Y., just east of Binghamton, with snow still falling.
9:45 p.m. EST Saturday: ConnDOT webcam shows a snow-covered Connecticut Route 8 at Waterbury:
9:15 p.m. EST Saturday: Bands of heavy snow are expected from New York's Catskill and Adirondack mountains into New England with up to 2 inches an hour possible, AccuWeather Meteorologist Randy Adkins said.
9:00 p.m. EST Saturday: Snow covers I-87 near Newburgh, N.Y., New York Thruway webcam shows.
8:55 p.m. EST Saturday:
8:45 p.m. EST Saturday: I-90 in Massachusetts reduced to 40 mph with truck restrictions, Massachusetts state police said.
8:30 p.m. EST Saturday: Snow starting to cover southern Maine including I-95 near Biddeford, Maine, DOT said.
8:20 p.m. EST Saturday: 7.9 inches of snow fell at Genoa, Ohio, NWS spotter reported.
8:00 p.m. EST Saturday: AccuWeather.com meteorologists are concerned about a freezing rain/sleet threat with temperatures in the mid- to upper 20s that could create icing problems in the Lehigh and lower Susquehanna valleys of eastern Pennsylvania.
7:35 p.m. EST Saturday: Snow-covered roads continue in New York state, according to New York DOT map:
7:22 p.m. EST Saturday: Snowy travel on U.S. 1/9 and I-278, Linden, N.J., New Jersey DOT webcam shows:
7:10 p.m. EST Saturday: Freezing rain is falling in Philadelphia with a temperature of 31 degrees, AccuWeather Senior Meteorologist Dave Samuhel said. The snow/ice transition line is heading northward.
The heart of the storm is in New York City with two to three more hours of snow, Samuhel said. Cold air dropped the temperature to 22 degrees, "a lot lower than the computer models were expecting," he said.
The snow is tapering off in Detroit and across Ohio where the worst of the storm has ended.
6:55 p.m. EST Saturday: 7.50 inches of snow fell southeast of Hudson, Ind., according to a CoCoRaHS report.
6:35 p.m. EST Saturday: Snow-covered travel on I-78 near Bethlehem, Pa., where there is a 45-mph speed PennDOT restriction:
6:30 p.m. EST Saturday: More than 2,200 Connecticut Light and Power customers, with most in Plymouth, Conn., were without electricity, the utility said.
6:20 p.m. EST Saturday: 1,400 Penelec customers, most of them in Mercer County, were without power in Pennsylvania, the utility website reported.
6:15 p.m. EST Saturday: It was still snowing, but Islip, N.Y., set the Dec. 14 snowfall record with 1.4 inches. The old record was 1.2 inches, set in 1988.
6:05 p.m. EST Saturday: 7.50 inches of snow fell one mile southwest of Millersburg, Ind., an NWS employee reported.
5:55 p.m. EST Saturday: Snow-covered I-91 south of Brattleboro, Vt., Vermont DOT webcam shows.
5:45 p.m. EST Saturday: PennDOT issues 45-mph restriction on I-80 in western Pennsylvania to the Ohio border. Restrictions also placed on all of interstates 78 and 83.
I-80 at Route 219 near DuBois, Pa.:
5:40 p.m. EST Saturday: Delays of more than two-and-a-half hours continue at JFK airport, and nearly a one-hour delay was occurring at Philadelphia airport, the FAA reports.
5:35 p.m. EST Saturday: NWS spotter reported 1 inch of snow an hour in Rimersburg, Clarion County, Pa., and snowfall amount of 6 inches.
5:30 p.m. EST Saturday: Snow is in the transition phase in Philadelphia, AccuWeather.com Senior Meteorologist Dave Samuhel said. It should change to rain within the next several hours. Snow will continue around New York City through midevening before also changing to rain.
5:20 p.m. EST Saturday: Reduced speeds on Route 30 near Lancaster, Pa. PennDOT reports snow- or slush-covered roads.
5:05 p.m. EST Saturday: Westbound lanes of Pennsylvania Turnpike are clear near Somerset, Pa., turnpike commission said.
5:00 p.m. EST Saturday: Five inches of snow at Clarion, Pa., NWS spotter reports.
4:50 p.m. EST Saturday: PennDOT issues 45 mph speed restrictions on interstates 80, 81, 83 and 283; U.S. routes 15, 22 and 30; and Pa. routes 283 and 581 in eastern Pennsylvania.
4:40 p.m. EST Saturday: Pennsylvania Turnpike closed by multi-vehicle crashes eastbound and westbound near Routes 601/219 exit near Somerset, Pa., Pennsylvania 511 reports.
4:30 p.m. EST Saturday: Multi-vehicle crash closes I-80 eastbound, east of Exit 78/Pa. Route 36 near Brookville, Pa., PennDOT reports.
4:25 p.m. EST Saturday: ConnDOT warns of slippery travel on I-91 at Airport Road, Hartford.
4:11 p.m. EST Saturday: Snowy travel on I-95 south of Long Wharf Drive, New Haven, Conn., Connecticut Department of Transportation webcam shows.
4:05 p.m. EST Saturday: Six-point-three inches of snow at Napoleon, Ohio, NWS spotter reports.
4:00 p.m. EST Saturday: It is snowing and 34 degrees at Philadelphia International Airport. PennDOT webcam shows snow on I-95 at the airport.
3:55 p.m. EST Saturday:
An accident on the NE Ext of the PA Turnpike has all lanes blocked near mi. marker 46 between Quakertown/S. Whitehall pic.twitter.com/shYgBea5lF— Bill Deger (@muwxguy) December 14, 2013
3:50 p.m. EST Saturday: Seven inches of snow at Leipsic, Ohio, NWS spotter reported.
3:45 p.m. EST Saturday: Six inches of snow at Akron, Ill., NWS spotter reported.
3:31 p.m. EST Saturday: Wet roads with freezing conditions on I-83 at Queen Street, York, Pa., where there is snow and a quarter-mile visibility reported:
3:25 p.m. EST Saturday: Seven-and-a-half inches of snow at Pekin, Ill., Mesonet reports.
3:05 p.m. EST Saturday: Icy spots possible on I-95/Cross Bronx Expressway:
3:00 p.m. EST Saturday: Route 522 at West Virginia/Virginia line:
2:50 p.m. EST Saturday: Five inches of snow reported by W.Va. DOT at Quinwood, Rainelle and Rupert.
2:45 p.m. EST Saturday: Heavy snow at Altoona, Pa., on I-99 at 17th Street with low visibilities, according to PennDOT webcam.
2:40 p.m. EST Saturday: Six-point-three inches of snow 2 miles east of Warsaw, Ind., NWS employee reported.
2:35 p.m. EST Saturday: Snow in Evanston, Ill.:
Marius Daugirdas skis on the sidewalk on Saturday, Dec. 14, 2013., in Evanston, Ill. (AP Photo/Nam Y. Huh)
2:30 p.m. EST Saturday: Five inches of snow at Detroit, official NWS observation showed.
2:25 p.m. EST Saturday: Eight-point-three inches of snow fell at Elsah, Ill., NWS spotter reported.
2:15 p.m. EST Saturday: Wet with freezing conditions on I-81 at Route 30, Chambersburg, Pa., according to PennDOT.
2:10 p.m. EST Saturday: Five-point-six inches of snow fell at Ossian, Ind., NWS spotter reports.
2:00 p.m. EST Saturday: More than two-and-a-half hour delays at JFK airport, FAA reports.
1:55 p.m. EST Saturday:: Snowing in Montgomery County, Md. on I-270. Slippery travel expected to the northwest in Frederick and Hagerstown, Md.
1:50 p.m. EST Saturday: Numerous vehicle crashes reported around Detroit amid slippery roads, according to WWJ-AM.
1:35 p.m. EST Saturday:: One inch of snow at Central Park and 2.3 inches at Bridgeport, Conn., according to NWS New York City.
1:30 p.m. EST Saturday: Ground stop because of the weather at JFK airport, New York, according to the FAA.
1:25 p.m. EST Saturday: An inch of snow an hour is possible into early Saturday evening for parts of northern Indiana, southeastern Michigan and northern Ohio, AccuWeather.com Expert Senior Meteorologist Alex Sosnowski said.
"It could catch a lot of motorists off guard. Road crews may be overwhelmed. Motorists can get stuck, basically," Sosnowski said.
The heavy snow band is expected to shift this evening into parts of central and northern Pennsylvania and extend into northern New England, where 1 to 3 inches of snow an hour could fall.
1:10 p.m. EST Saturday: Snow beginning to fall in Baltimore, shown on this Maryland DOT webcam at I-95 north of I-195, but temperatures are above freezing, which AccuWeather.com meteorologists said should limit accumulations.
12:58 p.m. EST Saturday: Five inches of snow at Van Wert, Ohio, emergency manager reports.
12:41 p.m. EST Saturday: Snow beginning to fall in Albany, N.Y., as seen on this New York DOT webcam on I-787 from the north side of the Corning Tower:
12:35 p.m. EST Saturday: Travel conditions improving in Illinois, according to Department of Transportation map. The image time at the bottom of the map is listed in Central Time.
12:30 p.m. EST Saturday: Watch the repeat of our special edition of "AccuWeather LIVE" for the latest details on the winter storm:
12:16 p.m. EST Saturday: Snow/ice conditions reported on I-495/Long Island Expressway from Cross Island to Grand Central parkways in Queens, New York DOT reports:
11:25 a.m. EST Saturday:: Delays starting to build at JFK, La Guardia and Philadelphia airports, also at Hartsfield in Atlanta, the FAA reports.
11:22 a.m. EST Saturday: Ten and 8 inches of snow reported by NWS spotters at Macomb and Bardolph, Ill., respectively.
11:12 a.m. EST Saturday: Snow-covered travel on Route 22 at Cresson Summit, Cambria County, Pa., PennDOT webcam shows:
11:02 a.m. EST Saturday: Eight inches of snow northwest of Good Hope, Ill., NWS spotter reports.
10:41 a.m. EST Saturday: A total of 335 arriving and departing flights have been cancelled so far this Saturday at Newark Liberty International Airport, according to FlightStats.com. The number at Chicago's O'Hare International Airport stands at 171.
10:35 a.m. EST Saturday: Snow continues to fall around Chicagoland, where a total of 3 to 6 inches is expected.
10:25 a.m. EST Saturday: The National Weather Service Office in Blacksburg, Va., received the following from Twitter user @stormy1206.
10:16 a.m. EST Saturday: Indiana Department of Transportation reports that road conditions are difficult across the majority of northern Indiana.
10:00 a.m. EST Saturday: Multi-vehicle accident has occurred on eastbound U.S. 322 in between State College and Lewistown, Pa., according to @511PAStatewide.
9:55 a.m. EST Saturday: Latest snowfall totals from National Weather Service spotters: 10.5 inches near Industry, Ill. (in western Illinois) and 8.3 inches in Wentzville, Mo. (west of St. Louis).
9:47 a.m. EST Saturday: A Illinois Department of Transportation camera captured this snowy scene on I-90 at 67th Street in Chicago.
9:33 a.m. EST Saturday: A Ground Stop is in effect for flights arriving at Chicago's O'Hare International Airport, according to the FAA. FlightStats.com reports the number of cancelled flights at the airport so far this Saturday has topped 130.
9:23 a.m. EST Saturday: AccuWeather.com received a report of 11 inches in Augusta, Ill., which is located in northwestern Illinois.
9:17 a.m. EST Saturday: Eric Engler from the Missouri Department of Transportation told AccuWeather.com that the incident that forced officials to close I-70 at mile marker 214, west of St. Louis has been cleared.
9:01 a.m. EST Saturday: AccuWeather.com meteorologists updated the snowfall forecast map, which can be found here.
8:58 a.m. EST Saturday: Employees at the National Weather Service Office in Indianapolis measured 2.3 inches.
8:50 a.m. EST Saturday: Snow and ice conditions are being reported on roads around the New York City area, according to New York State 511 Twitter feed.
8:48 a.m. EST Saturday: New York Department of Transportation captured this image on I-81 at Exit 4 in Binghamton, N.Y., where the snow has dropped visibility down to a half mile.
8:37 a.m. EST Saturday: A National Weather Service spotter measured 9 inches of snow near Wright City, Mo., located west of St. Louis.
8:26 a.m. EST Saturday: The New York City skyline is no longer visible on web cameras from Newark, N.J., where you can see the skyline on a clear day.
8:17 a.m. EST Saturday: The following picture was taken near Kingston, N.Y.:
8:16 a.m. EST Saturday: Heavy snow continues to fall around the St. Louis area. Visibility has dropped to a half mile at the city's International Airport. One of the heaviest bands of snow around the area is centered on I-70, just east of the intersection of I-55.
8:00 a.m. EST Saturday: The following image, from the Illinois Department of Transportation, shows the latest road conditions across Illinois. The time listed at the bottom of the image is in Central Time.
7:56 a.m. EST Saturday: Flight cancellations at Newark's International Airport have already topped 300.
7:44 a.m. EST Saturday: National Weather Service spotter reports 7.2 inches of snow near Lake St. Louis, located west of St. Louis.
7:30 a.m. EST Saturday: The narrow band of heavy snow located just north of St. Louis and into central Illinois is expected to produce totals of up to 10 inches.
7:11 a.m. EST Saturday: Missouri DOT camera snapped this image of snow-covered Route 67, which is located Lambert-St. Louis International Airport.
7:06 a.m. EST Saturday: While it was still snowing heavily, a measurement of 6 inches of snow was reported by a National Weather Service spotter near New Haven, Mo., which is located west of St. Louis.
7:00 a.m. EST Saturday: Light snow has started falling at Newark, N.J., and New York City's John F. Kennedy International Airport.
AccuWeather.com's Staff Writer Mark Leberfinger contributed to the content of this story.
As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave.
Repeating and slow-moving storms will raise the risk of flash flooding and damaging winds over northern and central High Plains into Thursday night.
Repeating downpours will raise the risk for flash flooding along the Gulf coast and lower Mississippi Valley through the middle days of the week.
Highs will run between 10 and 15 degrees Fahrenheit above average across much of the western United States into the upcoming weekend.
The F1 season continues this weekend with the German Grand Prix in Hockenheim with disruptive showers and thunderstorms in the forecast.
The heat felt across the United Kingdom during the middle of July has faded and is not expected to return through at least the first week of August.
Hurricane near Jacksonville; $2.5 million damage in East Florida.
Charlotte, NC (1979)
Last of 12 straight days on which some rain fell. Total precipitation was 3.74".
Redfield, SD (1990)
A total of 1.76" of rain in 25 minutes during the morning, then a tornado struck in the afternoon.