County annual report · FIPS 26055
2021 Grand Traverse County, MI Power Outage Report
In 2021, customers in Grand Traverse County, MI went without power for an average of 9.5 hours, a total of 575K customer-hours (Michigan average 26.6 hours). That ranks 60th worst of 83 Michigan counties and 811th 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 Grand Traverse 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 | August 10, 2021 12:00 | August 15, 2021 06:00 | 4d 18h | 11,881 | 207K |
| 2 | December 16, 2021 03:00 | December 21, 2021 03:15 | 5d | 8,415 | 290K |
| 3 | March 29, 2021 20:15 | March 30, 2021 01:00 | 4h 45m | 3,936 | 9,939 |
| 4 | June 21, 2021 12:15 | June 22, 2021 00:45 | 12h 30m | 1,471 | 3,554 |
| 5 | March 27, 2021 19:30 | March 28, 2021 04:30 | 9h | 1,087 | 3,308 |
| 6 | May 6, 2021 21:15 | May 7, 2021 16:15 | 19h | 957 | 12K |
| 7 | July 26, 2021 00:45 | July 26, 2021 02:00 | 1h 15m | 740 | 574 |
| 8 | May 28, 2021 14:30 | May 28, 2021 15:45 | 1h 15m | 708 | 402 |
| 9 | May 7, 2021 19:30 | May 7, 2021 20:15 | 45m | 635 | 387 |
| 10 | June 7, 2021 12:00 | June 7, 2021 15:00 | 3h | 562 | 1,208 |
Outage episodes by size in 2021: 52 reached 100+ customers, 5 reached 1,000+ customers, 1 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 Grand Traverse 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 |
| Great Lakes Energy Coop | 2021 | 20.4 hrs | 3.25 | 3.4 hrs | 1.71 |
| Cherryland Electric Coop Inc | 2021 | 8.1 hrs | 1.36 | 66 min | 0.65 |
| City of Traverse City - (MI) | 2021 | 37 min | 0.34 | 37 min | 0.34 |
| Wolverine Power Supply Coop | - | - | - | - | - |
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 ÷ 60,521 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. Grand Traverse County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grand Traverse 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/grand-traverse-county