THUNDER BAY – Environment Canada has issued a Flash Freeze Warning for Thunder Bay. Almost all of the region around Lake Superior and west to the Ontario Manitoba border is now under some weather warning or advisory. Plunging temperatures this evening resulting in dangerous winter travelling conditions as surfaces quickly freeze.
A sharp Arctic cold front is expected to move through the Lakehead area and areas north of Lake Superior this evening as a Colorado low pressure system approaches. Rain and above freezing temperatures will be suddenly replaced by snow and temperatures plunging to several degrees below freezing this evening. This will cause especially untreated surfaces to become icy and very slippery resulting in dangerous travelling conditions for motorists and pedestrians.
As this low passes by over Lake Superior tonight a general snowfall of 5-10 cm is expected by morning.
A second Colorado low tracking up towards Lake Superior may bring significant amounts of snow..Ice pellets..And freezing rain Friday night..Just in time for the new year. Warnings for this winter storm may be issued later tonight or Friday as a result.
Hazardous winter driving conditions are expected due to low visibilities from snow and local blowing snow and accumulating snow from both Colorado low pressure systems. Untreated surfaces may quickly become icy and dangerous especially in areas subject to a flash freeze this evening. Travellers should adjust their plans accordingly.
Environment Canada is closely monitoring this situation and will adjust watches and warnings as required.