County annual report · FIPS 55041
2021 Forest County, WI Power Outage Report
In 2021, customers in Forest County, WI went without power for an average of 27.4 hours, a total of 174K customer-hours (Wisconsin average 4.7 hours). That ranks 4th worst of 72 Wisconsin counties and 324th of 2,974 nationally.
Compared with WI, the US and 2020
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Forest County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 27, 2021 04:15 | July 30, 2021 09:15 | 3d 5h | 2,924 | 73K |
| 2 | December 16, 2021 03:00 | December 19, 2021 19:30 | 3d 16h | 2,310 | 76K |
| 3 | June 14, 2021 01:30 | June 14, 2021 10:45 | 9h 15m | 2,260 | 7,689 |
| 4 | July 15, 2021 04:45 | July 15, 2021 06:45 | 2h | 1,145 | 2,290 |
| 5 | March 6, 2021 19:30 | March 6, 2021 21:30 | 2h | 754 | 496 |
| 6 | March 11, 2021 08:30 | March 11, 2021 14:45 | 6h 15m | 717 | 1,801 |
| 7 | July 1, 2021 16:30 | July 1, 2021 19:45 | 3h 15m | 581 | 1,577 |
| 8 | August 13, 2021 04:00 | August 13, 2021 10:15 | 6h 15m | 329 | 2,041 |
| 9 | May 31, 2021 21:30 | June 1, 2021 04:15 | 6h 45m | 301 | 1,174 |
| 10 | March 2, 2021 15:30 | March 2, 2021 18:00 | 2h 30m | 246 | 492 |
Outage episodes by size in 2021: 20 reached 100+ customers, 4 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 Forest County reported on EIA Form 861 for 2021, 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 | 2021 | 7.0 hrs | 1.13 | 1.7 hrs | 0.73 |
| Wisconsin Public Service Corp | 2021 | 9.3 hrs | 1.46 | 1.6 hrs | 0.83 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 85% of Wisconsin's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 6,340 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. Forest County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Forest County, WI annual power outage report, 2021, 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/2021/wisconsin/forest-county