Update 7:20 p.m. EDT Thursday May 23, 2013 This blog is no longer live. It was last updated on June 1, 2012.
What to expect:
Accompanying the risk of thunderstorms with strong winds and large hail into Friday evening is the potential for a few tornadoes.
9:50 P.M.: Thunderstorm wind damage reports all across PA: Fulton, Blair, York, Clearfield, Mifflin, Potter and York Counties.
8:27 P.M.: Reports of tornadoes in Raleigh Terrace, VA, 1 mile northeast of Kecoughtan, VA and at BWI airport in Anne Arundel, MD.
Widespread damage to homes reported in Merrimac Shores, VA.
7:37 P.M.: Reports of thunderstorm wind damage across PA: Mobile home overturned and trees down in Clearfield County, wires down in Cambria County.
7:10 P.M.: Report of a funnel cloud south of Ashland in Hanover County, VA.
6:45 P.M.: Report of a funnel cloud E. of Centerville, Goochland County, VA.
6:38 P.M.: Flooding reported in Lancaster County, PA.
6:15 P.M.: Funnel cloud and several downed trees reported in Benson, Harford County, MD.
6:00 P.M.: Trees and wires down in Somerset, PA.
5:37 P.M.: Unconfirmed tornado reported Ligonier, PA. Reports of snapped trees, roofs off structures, and other structural damage.
5:27 P.M.: Multiple reports of a funnel cloud 500 to 1000' off the ground near US 340 & US 15 intersection in Frederick, MD.
5:23 P.M.: Preliminary report: Officer reported tornado on the ground just north of Highway 17, two miles north of Chesterfield in Pasquotank County, N.C. Tornado lifted after several minutes but rotation was still evident, the report reads.
5:19 P.M.: Tornado possibility in Central Prince William County, N. Virginia & Southern Fairfax County, Northern Virginia through 5:45 p.m.
5:00 P.M.: Tornado possible in Western Prince Georges County, Central Maryland through 5:15 PM
4:50 P.M.: Preliminary report: Funnel Cloud spotted 1 mile N of Shrewsbury, York County, PA at 4:26 PM
4:40 P.M.: Tornado possibility for S. Baltimore County, NW Anne Arundel County, MD & SE Howard County, MD. through 5 PM.
4:19 P.M.: New tornado producing storm south of DC moving toward Bryans Road.
3:53 P.M.: Preliminary report released: Funnel cloud spotted in Mackeys, N.C. at 3:29 P.M. Several trees down in Southampton County, VA.
3:43 P.M.: Training thunderstorms causing flash flooding Albermarle County, VA.
3:24 P.M.: Preliminary storm reports show a funnel cloud reported 3 miles southwest of Damascus in Montgomery County, MD. No damage reported.
2:30 P.M.: Doppler radar indicating multiple rotating thunderstorms, capable of producing tornadoes over Virginia and Maryland at this time.
1:59 P.M.: "The storm [southwest of] Charlottesville has 64 knots of rotation," Accuweather meteorologist Henry Margusity said. "That's very strong. That's almost hurricane wind speeds at 6,000 feet."
1:54 P.M.: The Storm Prediction Center issued a second tornado watch box covering eastern areas in Pennsylvania, Maryland, Virginia and North Carolina.
The Difference Between Tornado Watches and Warnings
01:29 P.M.: The Storm Prediction Center issued a huge tornado watch box for areas in Pennsylvania, West Virginia, Maryland, Virginia, and North Carolina that expires at 9 P.M.
01:14 P.M.: AccuWeather broadcaster Violeta Yas tweeted "Not expecting a tornado outbreak, but conditions very conducive for wind damage in some of those highly populated areas, especially 2pm-9pm." To be clear, tornadoes could develop today but it likely won't be a mega-outbreak.
01:06 P.M.: "The storms are just getting going," AccuWeather meteorologist Henry Margusity said. "In the next one to three hours we'll start to see something."
12:35 P.M.: Radar at 12:15 p.m. EDT indicated potentially damaging thunderstorms developing over central and northeastern North Carolina to southern Virginia.
12:30 P.M. : The Storm Prediction Center released an updated severe weather outlook for Friday.
08:00 A.M. : AccuWeather meteorologist Alex Sosnowski says "The prime threat area for tornadoes with this event will be bounded by the Pennsylvania Turnpike to the north, I-81 to the west, I-95 to the east and I-40 to the south."
Tornado Risk DC, Lancaster, Raleigh, Roanoke
A major Thanksgiving Day storm threatens to ruin holiday events across the Central states with flooding rain, snow, a glaze of ice and fog.
Hurricane Sandra, located hundreds of miles southwest of Mexico, is becoming better organized and will likely track northward through the rest of the week.
Unsettled weather will stretch across the United Kingdom on 27th November as millions set out in search of the best Black Friday deals on offer.
Winterlike conditions will continue disrupt travel across the Intermountain West leading up to Thanksgiving.
Compared to Thanksgiving Day in 2014, this Thanksgiving will be substantially warmer in the Northeast.
Wet weather will stretch from Texas to Michigan and could impact shoppers and slow travel during Black Friday.
A dozen tornadoes across these states.
Astoria, Or (1998)
5.56 inches of rain fell, setting a new all-time record. the previous rainfall record was 4.53 inches from January 9, 1966.
Great Appalachian Storm (24th-26th) developed greatest wind force, deepest snow, most severe early-season cold in history of the Northeast: 18.8 inches of snow at Akron, OH; Youngstown, OH, had a maximum 24-hour snowfall of 20.7 inches and a maximum single storm total of 28.7 inches; Steubenville, OH, had a maximum single storm total of 36.3 inches; Pittsburgh, PA, had a maximum 24-hour snowfall of 20.1 inches and a maximum single storm total of 27.7 inches; and Charleston, WV had a maximum 24-hour snowfall of 15.1 inches and a maximum single storm total of 25.6 inches. At coastal stations such as Newark and Boston single-minute wind speeds in excess of 80 mph were registered. There was a 108 mph gust at Newark. Peak gusts of 110 were noticed at Concord, NH; 108 mph at Newark, NJ; and 100 mph at Hartford, CT. Atop Mt. Washington, a wind gust of 160 mph hit from the southeast early on the 26th. Central Park, in the heart of sheltered Manhattan Island, set an 80-year record of 70 mph.