Well, it's looking more and more likely that a significant winter storm is going to be affecting Southern MB this weekend, particularly for areas north and west of Winnipeg Saturday afternoon through Saturday night. With this weekend marking the start of spring break in southern MB, the storm could put a damper on travel plans for some people especially later Saturday. The details..
A storm system over Montana Saturday morning will move northeast and intensify as it moves over SW Manitoba Saturday evening. Snow from this system will spread over much of southern MB by midday Saturday, becoming heavy at times Saturday afternoon into Saturday evening. The snow will likely be mixed at first with some rain over the Red River valley and SE Manitoba Saturday afternoon, including Winnipeg before it changes to all snow by Saturday evening. Further west, the precipitation will likely stay as all snow with heavy snow possible west of Portage Saturday afternoon. So if you have travel plans to the west Saturday, it would be advisable to leave Winnipeg as early as possible Saturday before the heavy snow develops by early to mid afternoon. For Saturday night, the band of snow should taper off in Winnipeg and the Red River valley as a dry slot pushes in, while heavy snow will be persisting north and west of Winnipeg through the Brandon, Dauphin, McCreary and Interlake areas. These areas will likely see the heaviest accumulations from this storm system with 20 to 30 cm possible by Sunday morning. Here in Winnipeg and SE Manitoba, amounts should be less (perhaps 10 cm) since there will be some melting precipitation at first, and the area of snow will not persist as long as areas further north and west. However if the warm air is less pronounced, or the system is slower.. Winnipeg could see heavier amounts of snow through Saturday night. All in all.. should be an interesting system to watch over the next day or two, and could add an extra element to Earth Hour tomorrow evening (lights out between 8 and 9 pm... maybe Mother Nature will do it for us!)