No foolin'... Winter Storm watch for Sunday

After a mild and rainy week over southern MB, Mother Nature has decided to play an April Fool's joke on southern MB with the potential for accumulating snow returning to southern MB including Winnipeg (great.. after we just got rid of it all!). A low pressure system over the Dakotas will spread an area of rain into Southern MB tonight from the south which will continue into Sunday morning with 10 mm possible. Colder air on the back side of the storm will cause the rain to change over to snow during the day Sunday, with the potential for 5 to 10 cm of snow by nightfall. Hopefully, the bulk of the precipitation with this sytem will move through as rain before the colder air moves in to change the rain to snow. If the changeover occurs earlier, or the precipitation is slower to move out, then we could see some heavy wet snow by Sunday afternoon. The good news is that temperatures are expected to remain near or just above freezing on Sunday, so there should be a lot of melting of any snow that does fall. Unfortunately this system will herald the arrival of colder air for the beginning of April, with temperatures some 5 to 10 degrees below normal through the upcoming week.