Red Deer and parts of central Alberta can expect to see 40 to 60 mm of rain today before it tapers off Friday morning.
Environment Canada issued a rainfall warning on Thursday because heavy downpours can cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible.
People should also watch out for possible washouts near rivers, creeks and culverts.
Counties impacted include Red Deer, Lacombe, Stettler and Ponoka.
In Red Deer there’s a risk of thunderstorms during the day and evening. Wind gusts over night will increase to 50 to 70 km/h.