01:17 Making Snowflakes Any Time of the Year The Weather Channel meteorologist Kelly Cass looks at how you can make a snowflake any season of the year.

At a Glance Ethan brought thundersnow and near-blizzard conditions to the coastal Northeast on Christmas.

Strong winds caused blowing snow and scattered power outages and downed tree limbs.

Thundersnow was reported from the Ohio Valley into coastal New England.

Winter Storm Ethan blitzed much of the Northeast on Christmas Day with high snowfall rates accompanied by lightning, and strong, damaging winds, prompting blizzard warnings for some. Ethan started in the central Rockies on Dec. 23rd and moved through the Midwest on Christmas Eve.

Winter Storm Ethan brought a swath of snow from the central Rockies, where totals ranged in feet of snow, across parts of Nebraska, Kansas, Missouri and into the Midwest on Christmas Eve. Ethan brought a white Christmas to much of the mid-section of the country and interior Northeast.

Winds also downed trees in parts of Pennsylvania, New Jersey and Delaware. A tree was downed in Washington D.C. on 19th St. Northwest, according to the National Weather Service.

Ethan's impacts were most felt in New England where some received snow at a rate of up to 3-5 inches per hour, and thundersnow was reported from eastern Massachusetts to eastern Maine.

Snow at the rate of 1 inch per hour was reported Christmas morning in Bangor, Maine, Nashua, New Hampshire, Hartford, Connecticut, and Albany, New York, among other locations. Overnight Christmas Eve, thundersnow was reported in Pittsburgh .

(NEWS: Impacts of Winter Storm Ethan )

Ethan's coastal low-pressure system rapidly intensified as it developed off the New England coast and moved northeastward into the Bay of Fundy.

Here are a few snowfall amounts by state for Ethan.

Colorado

15 inches near Steamboat Springs; 2.3 inches at Denver Int'l Airport

Connecticut

4.8 inches in North Granby

4.3 inches in New Hartford

Illinois

4.0 inches at Illinois State University in Normal, Illinois

3.5 inches in Champaign

3.1 inches in Peoria

2.8 inches in Chicago; Whiteout conditions expected mid-afternoon Dec. 24 at Soldier Field

1.8 inches at Chicago's O'Hare airport

Indiana

5.0 inches near North Liberty

4.1 inches in West Lafayette

1.5 inches at Indiana State University

Iowa

4.0 inches in Humeston and Bedford

2.0 inches near Little Sioux

1.8 inches in Des Moines

Kansas

3.5 inches near Webber

2.5 inches in Oberlin

Maine

15.0 inches in Greenbush

14.5 inches in Auburn

14.2 inches near Long Pond

13.7 inches in South Amity

13.5 inches near Bangor (10 inches downtown) and in Orient

13.0 inches near New Gloucester

12.0 inches in Waterville, Buxton and Hollis

11.0 inches in Mount Vernon

11.0 inches in Gray

9.0 inches in Augusta

8.0 inches in Cumberland

5.0 inches in Portland

4.2 inches in Eastport

3.9 inches in Caribou

Rare blizzard warnings were issued for strong winds and lowered visibility on Christmas for parts of southern Maine and neighboring coastal New Hampshire. Snowfall rates of up to 4 inches per hour were recorded.

Thundersnow was heard during Christmas afternoon in downeast Maine, with snowfall rates of 2-3 inches per hour.

National Weather Service staff in Cumberland County, Maine, north of Portland, measured an incredible 3.7 inch-per-hour snowfall rate just after 10:30 a.m. EST on Christmas Day.

Visibility in Otisfield, Maine, was reduced to a mere 750 feet in wind-driven snow.

A number of locations had already picked up over 6 inches of snow, topped by a pair of 10-inch snow totals in Windham and near Shapleigh, Maine.

Massachusetts

7.2 inches in Acton

7.1 inches in Lunenburg

7.0 inches in Boxford

6.5 inches in Savoy

6.0 inches in Montague

4.3 inches in Worcester

2.9 inches at Boston-Logan Airport

Around 10 a.m. EST, the air traffic control tower at Boston's Logan Airport reported zero visibility, prompting a shutdown of the airport's runways . Delays began to clear early afternoon following about 2.9 inches at the airport.

Winds gusting up to 73 mph downed trees in Falmouth, Massachusetts . Just after 10 a.m., over 10,000 customers in Massachusetts were without power.

Ethan hammered the Boston metro area with thundersnow at the rate of 1 inch per hour on Christmas morning.

Michigan

4.0 inches in Monroe

3.8 inches in Lake Orion

3.3 inches in Detroit

2.1 inches in Ann Arbor at the University of Michigan

Missouri

4.5 inches in Spickard

4.0 inches near Kirkville

0.8 inches in St. Louis

Nebraska

7 inches in Scottsbluff

New Hampshire

11.5 inches in Waterville Valley

10.0 inches in Bartlett

9.5 inches in Gorham

9.0 inches in Plymouth

8.4 inches in Nottingham

4.9 inches near Nashua

Snowfall rates reached 5 inches per hour in parts of coastal New Hampshire!

New York

8.5 inches in Lake Luzerne

7.0 inches in Fishhouse and Northville (Fulton County)

6.0 inches in Schenectady and Hudson Falls

5.1 inches near Albany

2.5 inches near Poughkeepsie

Rhode Island

5.0 inches in Burrillville

2.7 inches in Foster

1.0 inch near Providence

Vermont

11.2 inches in Townshend

10.0 inches in Woodford

9.5 inches in Manchester Center

Wyoming