Environment and Climate Change Canada has special weather statements in effect across the southern prairies thanks to a drop in temperatures and incoming snow.
"The mild fall weather will come to an abrupt end this week across the prairies as a cold front slumping southward gives showers and ushers in the first Arctic air of the season," said the statement.
Daily highs in Estevan are forecast to be below freezing beginning Wednesday. Temperatures in the -5 to -10-degree range could last until Halloween.
Accumulating snow is expected to begin in western Saskatchewan late Monday and move east, reaching western Manitoba on Tuesday, into Wednesday.
Environment Canada has snowfall warnings in effect in much of Alberta and western Saskatchewan.
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