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A category 5 extreme ranking is indicated by a numerical score of 18 or higher on the scale. Out of the over 500 historical storms assessed since 1900, only 26 storms have been given a category 5 ranking. The highest ranking storm on the list is the Great Blizzard of 1978, which scored a value of 39.07.
Description of the NESIS scale. The Northeast snowfall impact scale (NESIS) is a scale used to categorize winter storms in the Northeast United States. [1] The scale was developed by meteorologists Paul Kocin and Louis Uccellini, and ranks snowstorms from category 1 ("notable") to category 5 ("extreme").
Category 5 1992 December 10–12: 48 inches (120 cm) 985 hPa (29.1 inHg) Blizzard Category 2 1993 March 12–15: 69 inches (180 cm) 960 hPa (28 inHg) Blizzard Category 5 1995 February 2–6: 20 inches (51 cm) 962 hPa (28.4 inHg) Storm Category 2 1996 January 6–10: 48 inches (120 cm) 980 hPa (29 inHg) Blizzard
Winter Storm Demi could create hazardous travel conditions across the mid-Atlantic and Northeast into early Monday morning as it delivers a quick round of snow to some of the country's largest ...
In March 2017, a winter storm near Burlington, Vermont, produced 5 inches in an hour and 8 inches over the course of two hours. A location in central Connecticut saw 6 inches in an hour during an ...
The regional snowfall index (RSI) is a scale used by NOAA to assess the societal impact of winter storms in the eastern two-thirds of the United States and classify them into one of six categories. The system was first implemented in 2014, and is a replacement for the Northeast Snowfall Impact Scale (NESIS) system which the National Climatic ...
More than 5 feet of snow fell on parts of western New York the last few days, ... “Our state agencies and over 100 National Guard members are on the ground to support storm operations.” ...
A theoretical blizzard may only impact enough people with enough snow to rate a category 2 on NESIS, but bring winds of over 70 MPH, paralyzing the region for days as 5–10 foot drifts and windblown debris are removed. Also, NESIS specifically provides for the storm's impact to the entire population of the affected area.