A day of record-breaking temperatures on Saturday was followed by a late season thunderstorm and damaging high winds overnight. The National Weather Service is still working to confirm whether it was straight-line winds or a rare late-season tornado that knocked out power to about 12,000 customers, the Star Tribune reports.

Storms knocked out power to about 67,000 people around the Twin Cities metro as storms rolled east into Wisconsin. It'll be hot and muggy Tuesday, with more storms possible Tuesday night. The forecast calls for a cooler Wednesday.

A thunderstorm shook southeastern Minnesota early Wednesday morning that whipped up large hail and 60- to 75-mph winds in some areas and littered streets with debris. Lightning sparked at least one house fire in Rochester, where utility crews scrambled to restore power amid scattered outages.

Crews had not finished restoring power in Bemidji and parts of the Iron Range after Monday night's storm when a follow-up storm lashed the area on Wednesday. Now several thousand customers are without power in cities including Grand Rapids, Bemidji, Mountain Iron, and Deer River. Officials say it could take as long as three days to get the electricity back on.

The Weather Service estimated winds at up to 60 mph Thursday night as a line of thunderstorms swept through south central Minnesota. The storms brought hail and lightning, as well as downpours.