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Per Environment Canada:  
 
A LOW PRESSURE SYSTEM WILL INTENSIFY OVER WYOMING TODAY THEN MOVE NORTHEASTWARD OVER LAKE OF THE WOODS TONIGHT AND THURSDAY. AS THIS LOW APPROACHES, IT WILL SPREAD HEAVY SNOW, FREEZING RAIN, AND RAIN INTO SOUTHERN MANITOBA. THE PRECIPITATION WILL BEGIN THIS EVENING IN SOUTHERNMOST REGIONS, AND OVERNIGHT ELSEWHERE. AT THIS POINT, IT APPEARS THAT THE HEAVIEST SNOW WILL FALL ALONG A LINE FROM THE TURTLE MOUNTAINS THROUGH PORTAGE LA PRAIRIE, GIMLI, AND BISSETT WITH 10 TO 20 CM EXPECTED. THE MOST LIKELY AREA FOR FREEZING RAIN WOULD BE FROM MANITOU THROUGH DUGALD AND PINAWA, WHILE THE SOUTHEAST CORNER OF THE PROVINCE NEAR SPRAGUE SHOULD ESCAPE WITH ONLY RAIN FROM THIS SYSTEM. THE PRECIPITATION WILL END THURSDAY MORNING IN AREAS WEST OF WINNIPEG AND THURSDAY AFTERNOON FARTHER EAST. THE EXACT TRACK OF THIS SYSTEM WILL BE IMPORTANT IN DETERMINING WHERE THE HEAVY SNOW AND FREEZING RAIN WILL OCCUR, AND WHERE THE RAIN SNOW BOUNDARY WILL SET UP. A SLIGHT SHIFT IN THE TRACK OF THE SYSTEM COULD PUT WINNIPEG INTO THE HEAVY SNOW AREA, OR CONVERSELY, INTO THE RAIN AREA. CURRENT INDICATIONS ARE THAT WINNIPEG WILL EXPERIENCE A MIXTURE OF SNOW AND FREEZING RAIN. WARNINGS WILL LIKELY BE ISSUED LATER TODAY ONCE THE TRACK OF THE SYSTEM COMES INTO CLEARER FOCUS. A WINTER STORM WATCH IS AN ALERT OF THE POTENTIAL DEVELOPMENT OF SEVERE WINTER WEATHER. PERSONS IN OR NEAR THESE AREAS SHOULD BE PREPARED FOR DEVELOPING ADVERSE WEATHER CONDITIONS AND SHOULD LISTEN FOR UPDATED WATCHES AND POSSIBLE WARNINGS.