Following the predominant jet pattern, the storm developed a very rapid forward trajectory and began to migrate toward the lower Great Lakes. Lake effect snow events started over Lake Ontario and Lake Michigan from northeasterly winds. The storm later intensified and moved northeast, tanked, and developed a long warm front stretching toward the New England states, and moving northeast along this jet stream track. A low-pressure system from the Pacific Ocean later came ashore over Northern California and crossed the Rocky Mountains, merging with an Alberta clipper low and a developing Texas low, drawing moisture from the northwestern Gulf of Mexico. NOAA color-enhanced photograph of storm system on February 1, 2011.Ī High-pressure system with a maximum pressure of 1,052 hectopascals (31.1 inHg) moved ahead of the storm, moving eastward across Montana. At least 36 deaths were reported to be related to the storm, many of them in shoveling or auto-related incidents, and the total damages were US $1.8 billion. In addition, thundersnow was recorded at some locations, including downtown Chicago. Several tornado touchdowns were reported in Texas and a tornado watch was issued for parts of Alabama, ahead of the cold front in the warm sector of the storm. Numerous power outages, flight cancellations, airport closures, road closures, roof collapses, rail and bus cancellations, mail stoppages, and school, government, and business closures took place ahead of and after the storm many of these disruptions lasted several days. Snowfall amounts of 20 to 28 inches (51 to 71 cm) were forecast for much of Northern and Western Illinois.Īn ice storm ahead of the winter storm's warm front also brought hazardous conditions to much of the American Midwest and New England, and many areas saw well over 1 in (2.5 cm) of ice accumulation. The central Illinois National Weather Service in Lincoln, Illinois, issued only their fourth blizzard warning in the forecast office's 16-year history. Many other areas not normally used to extreme winter conditions, including Albuquerque, Dallas and Houston, experienced significant snowfall or ice accumulation. Louis, Springfield, El Paso, Las Cruces, Des Moines, Milwaukee, Detroit, Chicago, Indianapolis, Dayton, Cleveland, New York City, New York's Capital District, and Boston. Blizzard conditions affected many other large cities along the storm's path, including Tulsa, Oklahoma City, Kansas City, St. With such continuous winds, the blizzard continued to the north and affected Eastern and Atlantic Canada. The Chicago area saw 21.2 inches (54 cm) of snow and blizzard conditions, with winds of over 60 mph (100 km/h). The storm brought cold air, heavy snowfall, blowing snow, and mixed precipitation on a path from New Mexico and northern Texas to New England and Eastern Canada. During the initial stages of the storm, some meteorologists predicted that the system would affect over 100 million people in the United States. The 2011 Groundhog Day blizzard was a powerful and historic winter storm that affected large swaths of the United States and Canada from January 31 to February 2, 2011, especially on Groundhog Day. The remaining reports are obtained from spotter and public observations sent to the NWS and Office of the NJ State Climatologist.Part of the 2010–11 North American winterġ Most severe tornado damage see Fujita scale "Coop" denotes observations from official National Weather Service Cooperative Observer Program stations. "CoCo" denotes observations from the CoCoRaHS precipitation observing network. Notes: Snow totals are posted for events where at least one station in NJ reports 2 or more inches of snow. Please read our Copyright and Data Disclaimer Information Snowfall amounts (inches) are taken from reports gatheredīy the NJ State Climatologist and the National Weather Service (NWS) Offices
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