The storm system that will be affecting southern Manitoba this weekend is expected to track across the western RRV Saturday night pushing through the Interlake towards the Ontario border Sunday. The bulk of precipitation with this system is expected to fall north and west of the low track, with most of the precipitation falling as snow towards the SK border. Snow is expected to develop over eastern SK late Saturday then spread northeastward towards the MB border Saturday night into Sunday morning. Snow will then continue over the northern Interlake pushing across the north basin of Lake Winnipeg during the day. At this point, it looks like a general 10-15 cm of snow is possible along the SK/MB border especially from Roblin up through the Swan River area towards The Pas. (see graphic from NOAA HPC showing probability of 10 cm or more snowfall) Similar amounts of snow are expected over neighbouring eastern SK. Further south, some light rain is expected to fall over the RRV Saturday night into Sunday, possibly mixing with a few wet snowflurries by Sunday afternoon as colder air wraps in behind the system. Overall though, the bulk of wintery weather with this system is expected to fall well north and west of Winnipeg. People planning on travelling through the Swan River/Roblin/Yorkton/Kamsack areas late Saturday into Sunday should be prepared for winterlike driving conditions.
UPDATE.. 8 am Nov 6. Here's a webcam image from Assessippi ski resort this morning along the MB/SK border near Roblin. At least 10 cm of snow was reported in the area overnight with another 5 cm or more expected today before things taper off. Road conditions in western MB and southern SK are listed as snowcovered and slippery this morning with travel not advised on some highways.
Some snowfall observations from southern MB and SK last night into today..
Mafeking, MB ......... 27 cm (between Swan River and The Pas) (5 pm)
Pelly SK ................... 24 cm (west of Swan River near Kamsack) (5 pm)
Grand Rapids MB ... 14 cm (6 pm)
Yorkton SK .............. 10 cm (8 am)
Roblin MB................. 10 cm (8 am)
Rossburn MB ........... 9 cm (8 am)
Regina SK.................. 6-10 cm (8 am)
Saltcoats SK ................ 8 cm (SE of Yorkton) (8 am)
Gilbert Plains MB .... 5 cm (west of Dauphin) (8 am)