A thunderstorm swept across southern Alberta Monday, prompting Environment Canada to issue thunderstorm warnings and watches.

The Heritage Day storm had officials warning of heavy rain and possible hail. The Calgary Airport was under a lightning advisory for about half an hour.

For the latest weather warnings in Alberta, check Environment Canada's website.

Thunderstorm watches and warnings were issued for much of southern and central Alberta, moving from west to east with the storm.

"Environment Canada meteorologists are tracking a severe thunderstorm capable of producing dime to nickel size hail and heavy rain," according to Environment Canada. "Remember, severe thunderstorms can produce tornadoes."

Longview hail

Hail on the highway south of Longview during a thunderstorm. (Darren Zaleschuk)

Thunderstorm warnings

A thunderstorm is sweeping across southwestern Alberta. This photo was taken on the Trans-Canada Highway outside Calgary. (Rachel MacLean/CBC)