Across the Front Range, expect sunshine early Friday before turning mostly cloudy during the afternoon with a chance of snow at night.
The storm will move out Sunday night.
One such trough is now giving outbreaks of rain, sleet and snow across Northern Ireland, southern Scotland and northern England, with some places mostly on hills waking to a carpet of snow this morning. Untreated surfaces, sidewalks, and driveways may become slippery for a period of time in the morning.
Very windy and blustery for a time this morning in fresh to strong and gusty westerly winds, falling off this afternoon.
Met Éireann say that showers will occur and that there's a risk of hail. Across remaining parts of England and Wales, there'll a line of showers crossing from West to East this morning, followed by sunny spells and fewer showers these mainly in the West. It will be cold and clear with lowest temperatures of 0 to 2 degrees with frost and icy patches.
WARMER MORE SEASONABLE WEEKEND
The heaviest snow, up to 12 inches, will fall in west-central Minnesota, the Weather Service said.
These totals have changed drastically over the past 24 hours as original totals for the Northland were expected to be as high as 8 inches in the Twin Ports and as high as 6 inches for the rest of the Arrowhead Region.
She said the Arctic outbreak that brought sub-freezing temperatures to the Midwest and Northeast "is heading our way" across the jet stream. Maximum temperature 9 °C.
The Minnesota State Patrol also urged drivers to avoid unnecessary travel ahead of the storm, but at least one semitrailer crashed in slick conditions on Interstate 90 near Jackson, Minnesota, according to Minnesota Public Radio. A Winter Weather Advisory is in place for these areas as some light icing is possible tonight from freezing drizzle and light freezing rain.