Highlights and lowlights of 2011Flooding Jan. 13-19: A period of rainfall resulted in flooding and a landslide that affected a segment of the Mountain Loop Highway east of Granite Falls. Flooding on the north fork of the Skykomish River washed away a cabin near Index. The Snohomish River reached major flood stage. Other flooding rivers included the Carbon, Cedar, Chehalis from Grand Mound downstream, Green, Newaukum, Nisqually, Nooksack and Puyallup near Orting, Satsop, Skagit, Skokomish, Stillaguamish, Skookumchuck, Snoqualmie and Tolt. March 30-April 3: More heavy rainfall produced one of the latest winter season flood scenarios on record on the Snoqualmie, Skykomish, Snohomish, Tolt and Stillaguamish. Nov. 22-24: A period of heavy rainfall of up to 10 inches in the mountains produced the first flood scenario of the fall/winter season. Rivers that exceeded flood stage included the Stillaguamish. Snow Feb. 22-23: Snow fell over much of western Washington. Amounts varied from one to 10 inches with Mount Vernon reporting 16 inches. Landslide March 10-17: A period of rainfall helped create a landslide that damaged four homes on a slope near Snohomish. Snowpack Given the healthy mountain snowpack during the winter of 2010-11 and the cool, wet spring, the snowpack was slow to melt in 2011. Paradise on Mount Rainier on Aug. 15 still had 44 inches of snow -- the highest ever on that date. High winds Sept. 25-26: Strong southerly winds blew along the coast, the north interior and the Puget Sound region. Winds up to 75 mph were recorded in Whatcom County. Nine thousand households lost power in Snohomish County. Extreme high pressure Dec. 1: Sea-Tac Airport recorded the highest atmospheric pressure on record going back to 1948. The barometer hit 1043.4 millibars, or 30.81 inches, of mercury, breaking the previous record set in 1949.
More information about local climateNational Weather Service, Seattle: www.wrh.noaa.gov/sew
Office of the Washington State Climatologist: www.climate.washington.edu
University of Washington Department of Atmospheric Sciences: www.atmos.washington.edu
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