Update at 5:05 p.m. EST Tuesday:
This blog is no longer live, as the severe threat has ended across the Northeast. Detailed reports of the event can be found below. Photos from the storm can be found here.
A fast-paced wintry system raced through the Northeast on Tuesday, bringing heavy snow to New York City and Boston.
I-90 and I-84 became snow covered and slippery, as conditions deteriorated quickly throughout the region. As of Tuesday evening, close to 4,000 flights were delayed across the nation with a majority of those delays into and out of Philadelphia International, Chicago O'Hare and LaGuardia airports.
On Monday, heavy snow and strong winds combined to create white-out conditions from Chicago to Cleveland, Ohio.
Five inches fell at Chicago's O'Hare Airport on Monday, bringing their total for the season to 67.9 inches. This season now ranks as the fifth snowiest on record.
Thunder and lightning accompanied the snow in some locations across the Midwest, leading to snowfall rates in excess of 2 inches an hour.
The highest accumulations with this storm occurred in parts of central and northern Michigan, as amounts climbed into the 6- to 9-inch range.
New Hampshire also had some of the highest snow totals, as 7 inches of snow fell in just three hours on Manchester.
Following the storm, a brief warmup will take place for a few days before another round of cold air moves in.
4:35 p.m. EST Tuesday: A burst of blinding snow is swinging northward along I-95 in Maine, near Portland.
3:55 p.m. EST Tuesday: Heavy snow and a quarter-of-a-mile visibility reported in Lowell, Mass.
3:17 p.m. EST Tuesday: Flight delays near 4,000 nationally, with the most delays into and out of Chicago O'Hare, Philadelphia International and LaGuardia airports, according to FlightStats.
2:00 p.m. EST Tuesday:
1:15 p.m. EST Tuesday: Flight delays climb near 3,000 in the U.S., according to FlightStats.
12:30 a.m. EST Tuesday: Much of the storm system is pulling away from Pennsylvania and New York and making its way out to sea:
11:50 a.m. EST Tuesday: Watch the latest edition of AccuWeather LIVE for updates on the storm track:
11:00 a.m. EST Tuesday: Thundersnow was reported in Pennsylvania as the storm system moves farther into New York and New England:
10:40 a.m. EST Tuesday:
Travel I-91 and I-84 is expected to quickly deteriorate over the next 30 minutes as the snowfall intensity picks up— CT State Police (@CT_STATE_POLICE) February 18, 2014
10:20 a.m. EST Tuesday: Snow builds up across New York City:
10:05 a.m. EST Tuesday: Domestic flight delays hit 1,000, according to FlightStats.
9:35 a.m. EST Tuesday: Heavy snow continues to fly in Pennsylvania. An NWS-trained snow spotter in Titusville, Pa., reports 5.4 inches of accumulation. Four inches were reported by a spotter in Darlington, Pa.
9:15 a.m. EST Tuesday: More than 2,000 customers across southeastern Pennsylvania are now listed without power by PECO.
8:30 a.m. EST Tuesday: Connecticut Department of Transportation issued a winter weather advisory warning of the high likelihood of travel accidents this morning.
8:00 a.m. EST Tuesday: Watch the latest AccuWeather LIVE for updates on the storm and a look at the weather to follow it:
7:45 a.m. EST Tuesday:
7:10 a.m. EST Tuesday: Excessive flight delays listed for Toronto, Reagan, Cleveland, Newark, and LaGuardia airports.
6:40 a.m. EST Tuesday: An accident is blocking traffic on the Garden State Parkway south at exit 143.
5:20 a.m. EST Tuesday: An NWS-trained spotter reports 5 inches of snow in Putnam County, Ohio.
4:00 a.m. EST Tuesday:
2:30 a.m. EST Tuesday: The Ohio Department of Highways measured 3.5 inches of snow in Carroll County.
1:20 a.m. EST Tuesday: Snow is falling heavily in and around Baltimore and is quickly approaching the western suburbs of Philadelphia. Visibility will be reduced to a half of a mile or less and roads will become snow covered and slick.
12:10 a.m. EST Tuesday: Snow is not the only hazard across the Great Lakes tonight. New York State Police reported several empty tractor trailers were blown over in Westfield, N.Y., between Erie, Pa., and Dunkirk, N.Y. The report was relayed to the NWS. A wind gust of 51 mph was recently measured in Dunkirk.
11:30 p.m. EST Monday: A National Weather Service trained spotter reports 9.1 inches of snow in Fremont, Mich., northwest of Grand Rapids.
10:40 p.m. EST Monday: Traffic camera in Cleveland, Ohio, shows I-71 at I-90/I-490 is partially snow covered.
9:20 p.m. EST Monday: Freezing rain east of Mansfield, Ohio, near Hepburn, reports trained spotter.
8:30 p.m. EST Monday: Heavy snow and near zero visibility reported at the Cleveland International Airport, Ohio.
8:15 p.m. EST Monday: A trained spotter reports 5 inches of snow in Greenville, Mich. A traffic camera along M-14 west of Sheldon Road shows snow-covered roadways in the area:
7:15 p.m. EST Monday: Flight delays top 4,000 nationally, as the storm heads for the Ohio Valley and Great Lakes.
7:05 p.m. EST Monday: 3.2 inches of snow fell in northern New Haven, Ind., in 90 minutes, according to a trained spotter. This means that the snow in that area fell at a rate of approximately 2 inches an hour.
6:30 p.m. EST Monday: Another band of snow is headed for Chicago, according to AccuWeather.com Meteorologist Justin Povick. This band could bring up to an inch of snow locally.
6:20 p.m. EST Monday: The Illinois Department of Transportation urges drivers to take it slow, as road conditions around Chicago have deteriorated.
5:40 p.m. EST Monday: National delays surpass 3,500 with the majority of those delays into and out of Chicago O'Hare, Chicago Midway, Minneapolis St. Paul and St. Louis International airports.
5:10 p.m. EST Monday: A trained spotter reports 4.8 inches of freezing rain near the border of Illinois and Iowa in Erie, Ill.
4:25 p.m. EST Monday:
I-465 MM 21.0 NB at W 71st / mile 21 Ramp slow <= 60 mins due to a crash— INDOT TrafficWise (@TrafficWise) February 17, 2014
4:15 p.m. EST Monday: In just 75 minutes, 3.2 inches of snow has fallen near La Porte, Ind., a trained spotter reports.
4:00 p.m. EST Monday: Near-zero visibility in Chicago, as heavy snow creates whiteout conditions in the area:
3:15 p.m. EST Monday: A trained spotter reports 2.5 inches of heavy snow in Wheatfield, Ind.
2:45 p.m. EST Monday: National flight cancellations top 1,200, as delays hit 3,000 with nearly 1,100 of those cancelations and delays in and out of Chicago O'Hare International, according to FlightStats.
2:10 p.m. EST Monday: Multiple reports of thunderstorms accompanying snow in northern and central Illinois.
1:30 p.m. EST Monday:
COMPLETE I-80/94 MM 2.0 EB at Indpls Bl/ mile 2 Center lane closed <= 45 mins due to a crash— INDOT TrafficWise (@TrafficWise) February 17, 2014
12:30 p.m. EST Monday:
Ice builds up on a window in Monticello, Ill. (Photo/Gigi Swanson)
11:55 a.m. EST Monday: Watch the latest edition on AccuWeather LIVE for current storm updates:
11:20 a.m. EST Monday: Co-op observer in Vesta, Minn., report 4.5 inches of snow so far this morning.
10:40 a.m. EST Monday: Excessive flight delays listed for Des Moines, Minneapolis/St. Paul, O'Hare and Lambert-St. Louis.
10:00 a.m. EST Monday: More than 12,000 power outages reported by Ameren Illinois.
9:25 a.m. ET Monday: The NWS office in Polk City, Iowa, reports about 2 inches of snow and an instance of thunder this morning.
9:15 a.m. EST Monday: Traffic accidents mount in the St. Louis area as snow and ice accumulate:
New: MULTI-VEHICLE COLLISION I-44 WB @ PAST LINDBERGH BLVD RIGHT LANE CLOSED (St Louis,MO)— MoDOT STL Traffic (@StLouisTraffic) February 17, 2014
New: ACCIDENT I-270 EB @ ON RAMP FROM LILAC AVE USE ALT ROUTE (St Louis,MO)— MoDOT STL Traffic (@StLouisTraffic) February 17, 2014
9:00 a.m. EST Monday: FlightStats lists more than 600 flight cancellations out of O'Hare International Airport in Chicago.
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San Francisco, CA (2001)
High only 44 degrees, record low maximum for date.
Savannah, GA (1899)
(12th-13th) 2 in. snowfall, one of 3 snowstorms in past 200 years that required a ruler measurement.
Great Arctic Outbreak (1899)
Great Arctic Outbreak Continues: Dallas-Fort Worth, TX -8 deg. F., all time low. Amarillo, TX - 16 deg. F., all time low. Tulia, TX -23 deg. F., tied for all time Texas low. Camp Clarke, NE -47 deg. F., state record low temp. Little Rock, AR Absolute Min. -13 deg. F.