Cold air and wintry are taking aim for part of the Rockies and Plains this week. Snow will also accompany the blast in some locations.
A push of cold air will drive southward along the eastern slopes of the Canada Rockies early this week.
Snow is most likely to fall over parts of the Canada Rockies and in some area farther east in Alberta Monday night and Tuesday.
From there, the cold push and at least spotty snow showers are likely to continue southward into Montana Tuesday night and Wednesday and the northern Plains of the United States Wednesday into Thursday.
The early-season outbreak will easily bring the chilliest weather of the season so far to these areas and will be accompanied by wind.
It is possible that some areas have daytime AccuWeather.com RealFeel® temperatures in the 20s and 30s for a couple of days.
The chill from this particular outbreak will take some time to get to the Great Lakes region and may have to wait for another push to do so.
This projected pattern fits with the connection that approximately 7 to 14 days after tropical systems curve before hitting the coast of Asia in the Pacific, that colder air pushes into part of the northern U.S.
Tropical Storm Ewiniar did this last week this east of Japan and Jelawat is following suit this week.
This story was originally published on Friday, Sept. 28, 2012 and has been updated.
Wintry weather marked the first days of autumn across parts of the Mountain West as snow mixed in with the changing fall foliage.
A tropical wave is likely to become the Atlantic Basin's next tropical storm as it approaches or crosses the Caribbean Sea later this week and potentially pose eventual threats to North America.
Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region to end this weekend.
Typhoon Megi will continue to strengthen before threatening lives and property across Taiwan and eastern China this week.
Jose Fernandez, pitcher for the Miami Marlins, died in a boating accident in southern Florida early Sunday morning.
The greatest danger of flooding across the central United States will unfold in western Texas, where downpours will be most persistent into Monday.
Arthurdale, PA ()
Golf-ball sized hail up to 8" deep.
Baltimore, MD (1816)
Water froze one-half of an inch thick.
El Cordnazo, CA (1939)
Greatest September rainstorm with 5.42 inches in 24 hours at L.A. Floods killed 45; $2 million damage.