A thunderstorm swept through the Foothills last night catching a few people off gaurd.

Environment Canada issued severe thunderstorm warnings as the swift moving system came up from southern Alberta.

The system seemed to move up from the Chain Lakes area near Highway 22 and up through Okotoks and Aldersyde.

And the humidity is going to be rising throughout the day leading to a humidex factor of 26 this afternoon with once again a risk of a thunderstorm.

Keep updated on our weather page.