County annual report · FIPS 55139
2023 Winnebago County, WI Power Outage Report
In 2023, customers in Winnebago County, WI went without power for an average of 1.2 hours, a total of 87K customer-hours (Wisconsin average 3.4 hours). That ranks 53rd worst of 72 Wisconsin counties and 2611th of 2,977 nationally.
Compared with WI, the US and 2022
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Winnebago County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 11, 2023 08:15 | November 11, 2023 20:30 | 12h 15m | 5,856 | 9,552 |
| 2 | June 8, 2023 09:45 | June 8, 2023 11:30 | 1h 45m | 5,702 | 1,432 |
| 3 | August 12, 2023 02:00 | August 12, 2023 18:30 | 16h 30m | 3,842 | 11K |
| 4 | August 3, 2023 23:30 | August 5, 2023 02:00 | 1d 2h | 3,502 | 20K |
| 5 | October 25, 2023 21:00 | October 25, 2023 22:00 | 1h | 3,214 | 1,609 |
| 6 | June 4, 2023 15:00 | June 4, 2023 15:45 | 45m | 2,795 | 1,398 |
| 7 | June 22, 2023 10:45 | June 22, 2023 18:15 | 7h 30m | 2,469 | 1,933 |
| 8 | August 7, 2023 13:30 | August 7, 2023 13:45 | 15m | 2,368 | 592 |
| 9 | November 16, 2023 16:30 | November 16, 2023 16:45 | 15m | 2,029 | 507 |
| 10 | August 26, 2023 04:30 | August 26, 2023 06:00 | 1h 30m | 1,472 | 1,472 |
Outage episodes by size in 2023: 48 reached 100+ customers, 14 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Winnebago County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2023 | 4.5 hrs | 1.04 | 85 min | 0.68 |
| Wisconsin Public Service Corp | 2023 | 2.5 hrs | 0.85 | 74 min | 0.67 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| City of Menasha - (WI) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Wisconsin's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 74,573 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Winnebago County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Winnebago County, WI annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/wisconsin/winnebago-county