December 19
edit2001: The highest equivalent sea-level air pressure in recorded history, 1,085.6 millibars (32.06 inHg), was measured at Tosontsengel, Khövsgöl Province, Mongolia.
2006: Cyclone Bondo reached peak intensity as a Category 4 storm while approaching Madagascar.
2009: A blizzard brought snowfall of well over 20 inches (51 cm) to parts of the eastern United States, including record totals in Washington, D.C. and Roanoke, Virginia.
2010: Record flooding reached its peak along the Gascoyne River in Western Australia. Some towns in the region received more than their average annual rainfall in just a few days.