The agency is predicting that 10 to 20 centimetres of snow will fall overnight into Friday morning.
Environment Canada said two factors are mainly responsible for the shift to a snowier forecast: a disturbance moving into Northern Montana which is spreading significant amounts of moisture across Southern AlbertaCombined with a moderate northeasterly flow at lower levels gradually injecting cooler air into the system.
Snowfall amounts as high as 20 cm are possible especially in the foothills and over higher terrain, Environment Canada said. Due to warm ground temperatures much of the snow will initially melt however most areas can still expect to see 10 cm of snow on the ground by Friday morning.
The weather will be a bit more moderate in the Brooks and Lethbridge areas with Environment Canada predicting that significant snow is not expected due to slightly warmer temperatures.
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