At a Glance A heavy early-season snowstorm dumped more than a foot of snow on parts of the Rockies.Travel impacts occurred, along with tree damage and power outages. The first blizzard of the season resulted in widespread power outages and downed trees in parts of Montana. Treacherous travel conditions and additional power outages were also observed across other portions ofthe northern and central Rockiesas an early-season snowstorm swept through the region. (MORE: ) Unlike the snow theRockies experienced in September,...

Are you eager for the first snow of the season? Have you already waxed your skis? Are you dreaming of snow days or dreading shoveling your driveway? We've researched National Weather Service 30-year average data to find the date by which the season's first measurable snow –defined as 0.1 inch or more –typically occurs to compile the map above. Keep in mind, these are averages of seasons that include early and late snowfalls. Any given season can produce the season's...

At a Glance Winter Storm Aiden brought the first accumulating snow of the season to Denver.The snow prompted an interstate closure in southeast Wyoming.Scattered power outages, broken tree limbs and poor travel conditions were the main impacts. Winter Storm Aiden brought the first snow of the season to the Denver metro area, but itsheavy, wet snow inparts of Wyoming, Colorado and western Nebraska triggered scattered power outages, not to mention travel headaches in the region. Aiden was a quick-hitting winter...

A view of Arapahoe Basin, Colorado, on October 11, 2017. (Arapahoe Basin) At a Glance The first ski area in the Rockies to open for the 2017-2018 season will do so Friday in Colorado.This opening date is only days later than Arapahoe Basin's earliest of record. A Colorado ski area will be the first in the Rockiesto open for the 2017-2018 season Friday, only days from its earliest opening day on record. Arapahoe Basin, located about 45 miles west-southwest of...

At a Glance Winter officially starts Dec. 21, but for many cities, snow and cold temperatures occur well before that time.Historical weather data in tandem with criteria from a winter severity index reveals when winter weather conditions typically arrive where you live. Winter officially begins on Dec. 21 this year, but depending on where you live, true winter weather conditions can begin well before this date or even after it passes. Climatologistof the University of Alaska-Fairbanks compiled the map below...

At a Glance Temperatures are expected to be above average in much of the South this winter. The Northwest has the highest odds of seeing colder-than-average temperatures.Precipitation will split between wet across the northern states and dry through the South.La Niña may play a role in the weather conditions this winter. Winter 2017-2018 will feature a nationwide split between colder-than-averageand wet conditions in parts of the northern states, while the southern tier will see warmer-than-average and dry conditions overall, according...

At a Glance A Great Lakes storm underwent bombogenesis and caused damage in spots.Wind gusts over 60 mph downed trees and knocked out power in Michigan's Upper Peninsula.October and November are prime months for these Great Lakes wind storms. A Great Lakes storm underwent bombogenesis early Tuesday andproduceddamaging winds that whipped up impressively high waves in Lake Superior. The low-pressure system intensified from a weak area of low pressure over the Ohio Valley Monday morning to an intense low centered...

At a Glance Great Lakes water temperatures are well above average after a warm summer and early fall.This may contribute to heavier lake-effect snow.However, if the persistent pattern of last season sets in, that may cut down lake snowfall totals. The Great Lakes are much warmer than average in early fall, which could actually lead to heavier lake-effect snowfall events this seasonif the overall jet-stream pattern cooperates. As of Oct.25, water temperatures averagedat least 5 degrees Fahrenheit above typicallate-October values,...

At a Glance Parts of the northern tier of states have received their first accumulating snow of the season.This includes cities such as Minneapolis/St. Paul and Fargo, North Dakota.The heaviest snow has fallen near the Lake Superior snowbelts. The first accumulating snow of the season blanketed a swath oftheupper Midwest and western Great Lakesas a low-pressure system originatingin the Canadian Rockies swept eastward across those regions. As of late evening Friday, the highest snowfall total reported is 10.9inches Scanlon, Minnesota.Duluth,...

At a Glance Through early May, 21 winter storms have been named.Most of the winter storms have affected the West with heavy snow, ice and rain. The East Coast has seen two major winter storms this season. Winter storm season 2016-17 has had a rapid turnaround from slow start in November. It kicked into full gear from mid-December through January and into the first half of February. At least one named winter storm was active in the first 25...

At a Glance The first weekend of November, Seattle saw one of its earliest snow events on record.La Niña is expected to develop for the second winter in a row.Colder-than-average temperatures are expected in the Northwest again this winter.Last winter was the snowiest in Portland in 24 years. With the forecast of another La Niña, coupled with some of the earliest snow on record in Seattle, some in the Northwest U.S. may wonder if a repeat of the cold, snowy...

At a Glance Over one-quarter of the area of the Lower 48 had snow on the ground on Nov. 8.This is the largest areal coverage of snow on that date in at least 14 years, according to NOAA data.This is a sharp contrast to one year ago, which was one of the warmest Novembers on record. Snow cover in the United States and North America is the most expansive for any early November in over a decade, despite recent warmth...

This is a previous version of our outlook on the weather to expect this Thanksgiving. For the latest version, . ...