County annual report · FIPS 26143
2021 Roscommon County, MI Power Outage Report
In 2021, customers in Roscommon County, MI went without power for an average of 51.2 hours, a total of 705K customer-hours (Michigan average 26.6 hours). That ranks 15th worst of 83 Michigan counties and 177th of 2,974 nationally.
Compared with MI, the US and 2020
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Roscommon 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 | December 16, 2021 17:30 | December 20, 2021 04:00 | 3d 10h | 14,563 | 459K |
| 2 | December 16, 2021 11:15 | December 16, 2021 16:30 | 5h 15m | 13,547 | 49K |
| 3 | March 11, 2021 14:30 | March 12, 2021 16:15 | 1d 1h | 2,850 | 16K |
| 4 | December 11, 2021 14:15 | December 14, 2021 11:00 | 2d 20h | 2,773 | 41K |
| 5 | January 6, 2021 15:15 | January 6, 2021 15:45 | 30m | 2,367 | 598 |
| 6 | August 27, 2021 22:15 | August 31, 2021 04:15 | 3d 6h | 2,011 | 33K |
| 7 | August 10, 2021 10:45 | August 11, 2021 22:30 | 1d 11h | 1,503 | 17K |
| 8 | October 11, 2021 15:45 | October 12, 2021 07:00 | 15h 15m | 1,280 | 12K |
| 9 | September 23, 2021 05:30 | September 23, 2021 16:30 | 11h | 1,111 | 4,125 |
| 10 | December 21, 2021 16:45 | December 22, 2021 01:00 | 8h 15m | 1,097 | 8,278 |
Outage episodes by size in 2021: 60 reached 100+ customers, 12 reached 1,000+ customers, 2 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 Roscommon 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 |
|---|---|---|---|---|---|
| Consumers Energy Co - (MI) | 2021 | 15.2 hrs | 1.60 | 3.8 hrs | 1.05 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Michigan's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,780 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. Roscommon County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Roscommon County, MI 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/michigan/roscommon-county