A glancing blow from the polar vortex will direct cold air southward and could raise the chance of snow in the central and eastern United States toward the middle of January.
A large storm will form over the eastern half of the nation next week and will bring a swath of unsettled conditions for days.
In the wake of recent snowstorms, the weather that is forecast to follow favors rounds of freeze and thaw cycles that can contribute to vehicle accidents and slip and fall incidents days later.
The 2013 season has a chance of producing no hurricanes through the middle of September, which would rival two records.
Rain keeps falling and devastating flooding continues in portions of Missouri, Kansas and neighboring parts of Oklahoma and Arkansas.
Extremes continue during the last week of May as some areas go from snow and frost to 90-degree temperatures and record highs.
An ongoing cool weather pattern from the Rockies to the East Coast has been helping to keep a lid on the number of tornadoes for 2013.
While wildfires are inevitable in the West this summer as vegetation dries out ahead of monsoon thunderstorms, this season has the potential to be worse than average.
Rain and gusty winds will sweep across New England and the Boston area overnight, where the manhunt is ongoing for the remaining suspect in Monday's Boston Marathon bombings.
The combination of lingering cold air and winter storms will yield the snowiest April for Minneapolis since 2002.
The risk of violent thunderstorms, some capable of producing a tornado will progress slowly eastward across the Plains Tuesday and Wednesday.
Spring will continue to evolve slowly. In some cases, it could be six to eight weeks behind last year's amazing pace.
There is the potential for severe weather during the Palm Sunday weekend from Houston to Jackson, Miss., and Tallahassee, Fla.
The storm spanning March 12-14, 1993, would unfold as arguably the worst winter storm and blizzard of the 20th century for the Eastern states.
More snow is headed for the Four Corners states over the weekend, bringing roadway travel disruptions to Denver and Flagstaff.
Heavy wet snow will cause travel and power disruptions from parts of North Carolina to portions of West Virginia, Pennsylvania and New Jersey during the middle of the week
A wintry system that will make a cross-country tour beginning this weekend has the potential to develop into a major storm along the East coast next week.
A storm bringing up to a couple of feet of snow to the Plains will reorganize on the East Coast this weekend and will deliver heavy snow to part of New England by Sunday.
A storm system set on bringing heavy snow from northwestern Kansas to Iowa at midweek may still pack enough punch to bring the biggest single snowfall of the season so far to Chicago.
A period of wet snow is in store from Washington, D.C., to New York City, Long Island and the South Coast of New England Wednesday night.
A blizzard will hit Long Island and Connecticut Friday night. The New York City area and northern New Jersey will be hit hard with windswept snow.
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