Update 4:58 p.m. Friday: The winter storm warning for SD&G has ended. There are no weather alerts in effect.
SD&G – Environment Canada says heavy snow is expected to blanket Cornwall and SD&G late Thursday night and into Friday morning.
Environment Canada issued a winter storm watch at 9 a.m. Thursday saying rain will start tonight before changing to snow and ice pellets overnight.
There’s also the risk of freezing rain during the changeover in precipitation from the Colorado low pressure system.
“With the rain-snow boundary positioned very close to the area, just a slight shift in the low track could change weather conditions drastically. If the boundary is farther north than currently anticipated, more rain and less snow can be expected,” the weather agency said.
Snow will be heavy at times with up to 15 centimeters (6 inches) expected to fall.
The storm should be done by late Friday.