Customers in more than 30 Indiana counties reported electrical issues to Duke Tuesday afternoon.
The macro burst left a path length of 35 miles with a width of up to 4 miles.
Almost 40,000 homes in Indiana are without power after temperatures dropped below zero and several inches of snow fell throughout the state.
No tornadoes have been confirmed yet by the National Weather Service.
A Duke Energy spokeswoman says it could be a three-to-four day power outage for some Indiana customers.
More than 60,000 Duke Energy customers were without power at the height of Wednesday’s storms, with almost half of those in Monroe and Vigo Counties.
Severe weather has ended but flooding and clean-up from last night’s storm is underway.
Due to extensive power outages across south-central Indiana, the Red Cross has opened several emergency relief shelters.
Duke Energy and REMC crews are out across the state working to restore power to customers.
Monroe County is facing several thousand power outages and a number of closures as the winter storm warning remains in effect.