Ĭlimate simulations for the Midwestern United States indicate warmer-than-normal temperatures and wetter conditions for the snow season (November-April) during the twenty-first century. The following are snow amounts for the previous 2 days as measured in the morning by NWS Cooperative Observers and CoCoRaHS observers. Warmer springs advance budburst timing by meeting the heat requirements of plants sooner, and in the Upper Midwest, greenup closely tracks to springtime warming. National Weather Service Chicago/Romeoville IL 1018 AM CST Sat. Ī study examining snow season trends across the Northern Hemisphere from 1967 to 2008 finds that snow seasons decreased by 5.3 days per decade, likely due to late winter onset and earlier springs. Spring snow cover variability is strongly controlled by surface temperature anomalies. Warmer air temperatures, linked to human-caused climate change, have triggered significant reductions in snow cover extent over high northern latitudes during the last 100 years, in particular during the spring season. Ī study examining US trends in record-breaking high and low monthly mean temperatures from 1900 to 2006 finds that February has the most significant excess of record highs, and that the excess is especially pronounced in the Midwest. This trend is one of the clearest signals of climate change that we experience directly. However in our warming climate, record highs have begun to outpace record lows, with the imbalance growing for the past three decades. In a stable climate, the ratio of new record highs to new record lows is approximately even. Winter snow drought is tied to record heat and underlying climate shift The unusually warm February weather resulted in early budding of leaves on trees and sprouting plants. This also was the longest stretch of 4+' of snow. This winter had the longest stretch of a foot or more of snow cover since the 1978-79 winter for both Chicago (15 days) and Rockford (19 days). This was only the fourth and fifth time on record that Chicago reached temperatures exceeding 70☏ in February. (Feb 8-16) with measurable snowfall in Chicago, tying the record for the most with February 3-11, 2018. Christmas morning 2016 was the last day O'Hare International Airport reported at least an inch of snow on the ground.įebruary has been one of Chicago's warmest on record. The city set new daily temperature records on four consecutive days from February 17 through 20, with temperatures reaching 67☏, 70☏, 69☏, and 70☏ respectively. From December 18 through the end of February, Chicago O'Hare Airport measured 0.6 inches of total snowfall, compared to an average if 23.4 inches for this period. Even with the 3-plus inches of snow, Chicago’s total snowfall this season is 10 inches below average, according to the National Weather Service. Chicago experiences record winter snow droughtĭue to historic and unseasonably warm rainy weather, Chicago experienced no measurable snow cover for the entire months of January and February for the first time in records dating back to 1884. Ashlee Rezin/Sun-Times After an unusually warm and snowless start to the year, winter finally hit Chicago on Wednesday.
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