Update at 2:45 a.m. EDT Friday:
Severe storms have diminished early Friday morning across the Northeast.
Showers and thunderstorms will persist through Friday with heavier rain in New England. This rain may lead to flooding, especially in areas that have already seen locally heavy rain from the storms Thursday afternoon through the night.
This blog is no longer live.
10:28 p.m. EDT Thursday: Multiple road closures due to flooding in Chittenden county Vt.
9:36 p.m. EDT Thursday: Route 15 near Weed Road is shut down due to flooding in Jericho, Vt.
8:36 p.m. EDT Thursday: Flash flooding on Huntington Road 1 mile west, southwest of Richmond, Vt., was reported.
7:53 p.m. EDT Thursday: A flash flood was reported 1 mile east, southeast of Underhill, Vt. Two feet of water is flowing over River Road near Chamberlin Farm Market.
7:43 p.m. EDT Thursday: Two miles north, northeast of Glenwood, Md., Maryland State Road 97 is flooded and closed at the intersection with Maryland Route 144.
7:19 p.m. EDT ThursdayThis picture of clouds was Tweeted by Sam Smith in South Carolina.
7:15 p.m. EDT Thursday: Two miles west, southwest of Damascus, Md., Kings Valley and Kingstead Roads are flooded.
6:07 p.m. EDT Thursday: This picture of an uprooted tree was shared on the AccuWeather Facebook wall by Jeff Welshans.
"Numerous large trees uprooted in Rauchtown, Pa., Clinton County as a result of a brief but powerful thunderstorm," said Welshans.
5:15 p.m. EDT Thursday: Parts of westbound Staten Island Expressway were closed due to flooding.
4:46 p.m. EDT Thursday: Flooding closed Rogers Park Road in Danbury, Ct.
4:20 p.m. EDT Thursday: Lightning struck a home in Glen Rock, N.J., and smoke is visible. The fire department is responding.
3:37 p.m. EDT Thursday: A thunderstorm downed a tree and started a transformer fire 2 miles south, southwest of Newcomb Hall, Va.
Big changes are on the way for parts of the Western and Central states late this week and into this weekend.
Similar to the days prior to Thanksgiving, the worst weather will focus on the days prior to Christmas as millions of travelers take to the roads and airways.
Despite a brief warmup in Chicago, wintry conditions will span the weekend.
Warm air is forecast to surge into much of the eastern half of the nation by the weekend and will be accompanied by heavy rain and flooding risk in some locations.
Thunderstorms in parts of the South this weekend may become strong enough to threaten lives and property.
Tune in weekdays at 7 a.m. EST for the latest edition of AccuWeather LIVE.
Valley Forge, PA (1777)
Continental Army encamped at Valley Forge on a day having "stormy winds and piecing cold" in-and-out winter followed.
Milwaukee, WI (2000)
49.5" of snow in December - snowiest December on record.
Lancaster, CA (1984)
Ended up with about a foot of snow. One spot in Kern County (North of LA) had 19" of snow.