After a one-month break in winter weather events due to unfavorable conditions for winter storms, a blizzard began to develop across south-central Canada and the Upper Midwest on November 11. The system was estimated to have caused at least $50 million in damages. The 2021–22 winter season began with the formation of a significant winter storm in the Western United States on October 12, resulting in heavy snow accumulations of up to 28 in (71 cm) across much of the Intermountain West and over 80 rescues due to blizzard-like conditions in Utah. Drought was not expected in the eastern half of the country. Drought was forecasted to improve and end in the Pacific Northwest, while it was expected to develop or worsen across the Southwest. Near-average precipitation was expected in the Central U.S., Northern Plains, and Northeast. Below-average precipitation was expected across the far Southern Tier, with particularly in the Southwest, with above-average precipitation forecast in the far Northwestwern U.S., as well as the Ohio Valley and surrounding regions. Near to below-average temperatures were expected in the far northwestern U.S. Significantly above-average temperatures were forecasted across the Southern Tier, especially in the Southeast, with slightly above-average temperatures forecast in the Ohio Valley and Northeast. The temperature and precipitation outlooks reflected a typical La Niña weather pattern during the winter. On October 21, 2021, the National Oceanic and Atmospheric Administration's Climate Prediction Center released its U.S. Below-average temperatures were still expected to continue in the far Northwestern U.S. during the latter half of the winter, especially in the South and East. However, as both the La Niña and polar vortex were expected to strengthen later in the season, widespread above-average temperatures were forecast in most of the U.S. During the first half of the season, a relatively weak La Niña was expected to result in widespread below-average temperatures across the northern half of the country, with widespread above-average temperatures in the southern half. Slightly below-average temperatures were expected in most of the north-central and northwestern U.S. Overall for the winter, significantly above-average temperatures were forecast for most of the Southern Tier, with near-average temperatures in the Central and much of the Northeastern United States. The forecasts reflected the likelihood of a weak La Niña pattern and weak polar vortex during much of the season. winter temperature outlooks for the 2021–22 winter season. On October 13, 2021, The Weather Channel (TWC) released its U.S. In addition, major winter events can occur well after the official start of spring, as close as June in some cases, as shown by a very late-season winter storm that impacted Colorado in late May 2022 with heavy snow following warm temperatures just a day beforehand. Since both definitions of winter span the start of the calendar year, it is possible to have a winter storm spanning two different years. However, winter storms may occur outside of these limits, as shown by the early formation of this season's mid-October winter storm on October 12. These dates historically describe the period in each year when winter storms are most likely to occur. Based on the meteorological definition, the first day of winter started on December 1 and the last day was February 28. Similar to the previous winter, a developing La Niña was expected to influence weather patterns across the continent.īased on the astronomical definition, winter began on the winter solstice on December 21, 2021 and ended on the spring equinox on March 20, 2022. During the season, four storms have been ranked on the Regional Snowfall Index (RSI), although none attained the “Major” category.
Addiitonally, a very late out-of-season snowstorm struck the Rocky Mountains in late May. Additional significant events included a late-season winter storm in March that affected the Appalachian Mountains, and a major blizzard that affected North and South Dakota in mid-April. Despite this, several notable and significant events still occurred, including two separate record-breaking tornado outbreaks in mid-December, a significant winter storm in the South in mid-January, a powerful blizzard that impacted the Northeast coast at the end of January and a wide-ranging, significant winter storm that affected most of the eastern half of the country in early February. The 2021–22 North American winter was not as significant and record-breaking as the previous winter season. 60 inches (150 cm) east of Pinecrest, CaliforniaĠ.8 inches (20 mm) in Lake Ariel, Pennsylvania
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