March 13 - Severe weather that moved through the U.S. Midwest and Mid-Atlantic region produced widespread power interruptions, leaving over 396,000 homes and businesses without service, according to data compiled by PowerOutage.us. The aggregate disruption spanned several states, with the largest single-state impact recorded in Ohio.
Ohio accounted for roughly 123,300 outages, which equates to about 2.3% of the state's approximately 5.4 million electric customers based on the figures cited. Within Ohio, the most affected utility was a unit of American Electric Power (AEP), which reported around 40,000 customers without service. The data show that AEP serves about 1.5 million electric customers in Ohio.
Beyond Ohio, the storm-related interruptions were concentrated across multiple neighboring states. The reported major outage counts by state were as follows:
- Ohio: 123,300
- Wisconsin: 81,100
- Michigan: 75,100
- Indiana: 73,700
- Illinois: 30,700
- Pennsylvania: 12,600
The total number of customers without power reported in the compiled dataset was 396,500. The figures reflect the status at the time PowerOutage.us released its counts and capture both residential and commercial service interruptions caused by the severe weather.
The concentration of outages in Ohio and the substantial counts in several adjacent states indicate a broad geographic footprint for the storm system. At the utility level, the AEP unit in Ohio recorded the largest single-utility outage total cited in the data, representing a meaningful portion of the state's outages.
While the dataset provides a snapshot of the customer impact across states and utilities, the information does not include restoration timelines or detailed causes for each outage. The counts, however, offer a near-real-time view of the scale of service disruption resulting from the storms.