Nashville, Tennessee dropped to −17 ☏ (−27 ☌), and Knoxville, Tennessee recorded a record low of −24 ☏ (−31 ☌). Farther south, Roanoke, Virginia, set a record low of −11 ☏ (−24 ☌). Washington National Airport recorded a low of −4 ☏ (−20 ☌) and Washington Dulles Airport a low of −6 ☏ (−21 ☌) on the morning of January 21.
New York City's Central Park recorded a low of −2 ☏ (−19 ☌), breaking that date's record. Īs the cold air mass moved southeastward, it modified only slightly, resulting in frigid air for most of the East Coast of the United States starting on the morning of January 21, 1985. Virginia's official record low temperature of −30 ☏ (−34 ☌) was also set on this day in Pembroke, Virginia. Memphis, Tennessee recorded a low of −4 ☏ (−20 ☌), setting a record low for that day. Cleveland, Ohio fell to −18 ☏ (−28 ☌), which was at the time a record low. In Cincinnati, Ohio, the morning temperature of −21 ☏ (−29 ☌) tied for the fourth-lowest minimum temperature in the city's history, outdone by a cold mass the year before and a blizzard in 1977. Louis, Missouri saw a low of −18 ☏ (−28 ☌), and Pittsburgh, Pennsylvania had a low of −18 ☏ (−28 ☌), the coldest morning since 1899. In Chicago, Illinois, a record low of −27 ☏ (−33 ☌) combined with 25 miles per hour (40 km/h) winds, to produce a wind chill of −60 ☏ (−51 ☌). The Arctic air mass started moving into the United States on the evening of January 19 and into the morning of January 20, 1985. Unlike with cold-air systems, a pattern of self-modification did not immediately occur, and seasonable temperatures were absent for a number of days, a rarity in forecasting. Mount Mitchell, in North Carolina recorded an all time record low of −34 ☏ (−37 ☌).įrom Sunday, January 20, 1985, until Tuesday, January 22, 1985, the polar vortex, coupled with a large ridge of high pressure, moved polar air into the United States as far south as Arizona, Texas, and northern Florida. in December, 1984, suggesting that there was a build-up of cold air that was suddenly released from the Arctic, a meteorological event known as a mobile polar high. This was preceded by unusually warm weather in the eastern U.S. Blocked from its normal movement, polar air from the north pushed into nearly every section of the central and eastern half of the United States and Canada, shattering record low temperature records in a number of areas. The 1985 North America cold wave was a meteorological event which occurred in January, 1985, as a result of the shifting of the polar vortex farther south than is normally seen. A map of the United States detailing the record-low temperatures for various cities on January 21, 1985
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