A train of storms will continue to deliver rain to the Pacific Northwest with one particular storm this weekend likely to be the strongest of the bunch.
A major storm centered on Christmas Eve will affect the Midwest and East with areas of strong winds, heavy snow, torrential rain and thunderstorms.
With many winter storms lined up, snow will create a wintry setting for Christmas in some areas.
Several fast-moving storm systems will bring unsettled weather to the British Isles and northern Europe this week.
A potent cold front will bring much cooler air and a flood threat to parts of South America this weekend.
In a rare event late last week, visitors to Grand Canyon National Park were able to see fog roll into the canyon like a tide, blanketing the popular tourist attraction.
Valparaiso, IN (1981)
Heavy lake effect snowburst dumps 22" in just a 3-hour period.
Las Vegas, NV (1984)
Trace of snow fell.
Mauna Kea, HI (1988)
Wind-driven snow and sleet led to evacuation of astronomical observatories.