Frost and wind speeds upwards of 90 km/h are likely for the latter half of the long weekend.

Environment Canada has issued a special weather statement for all of southern Manitoba.

"After a day of well above normal temperatures expected on Saturday, an Alberta Clipper will form and pass across the Prairies on Sunday," Environment Canada says in the statement.

Rain is a possiblity overnight on Saturday, and for some areas on Sunday. Daytime highs for Sunday are still expected to reach over 20 degrees for most areas. However, lows overnight will dip to 5 degrees, and will only reach around 12 degrees on Monday.

By next week the weather will be quite different.

"The system will bring showers, gusty winds and much cooler temperatures to southern Manitoba. A cold air mass will slide south in the wake of the clipper, and entrench itself over Manitoba on Tuesday morning."

Environment Canada says they expect to issue frost advisories with the Monday afternoon forecasts.

Widespread frost is possible in a number of localities in southwestern Manitoba on Tuesday morning. A risk of frost may also linger over the Red River Valley and southeastern Manitoba Wednesday morning.