County annual report · FIPS 26073
2018 Isabella County, MI Power Outage Report
In 2018, customers in Isabella County, MI went without power for an average of 3.2 hours, a total of 118K customer-hours (Michigan average 10.0 hours). That ranks 62nd worst of 80 Michigan counties and 1434th of 2,798 nationally.
Compared with MI, the US and 2017
Coverage line is EAGLE-I's share of Michigan customers tracked each year.
Biggest outages in Isabella County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 14, 2018 09:45 | April 16, 2018 01:45 | 1d 16h | 9,427 | 36K |
| 2 | December 27, 2018 05:15 | December 27, 2018 07:15 | 2h | 2,156 | 3,774 |
| 3 | August 27, 2018 03:15 | August 28, 2018 23:45 | 1d 20h | 1,259 | 19K |
| 4 | May 4, 2018 15:00 | May 9, 2018 21:00 | 5d 6h | 1,173 | 11K |
| 5 | July 16, 2018 16:45 | July 17, 2018 01:30 | 8h 45m | 570 | 2,091 |
| 6 | August 1, 2018 17:45 | August 1, 2018 20:45 | 3h | 559 | 1,450 |
| 7 | May 26, 2018 23:30 | May 28, 2018 20:30 | 1d 21h | 505 | 8,862 |
| 8 | May 1, 2018 17:00 | May 1, 2018 19:15 | 2h 15m | 447 | 784 |
| 9 | February 25, 2018 11:00 | February 25, 2018 23:30 | 12h 30m | 429 | 2,228 |
| 10 | May 3, 2018 13:00 | May 3, 2018 16:30 | 3h 30m | 425 | 398 |
Outage episodes by size in 2018: 34 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 Isabella County reported on EIA Form 861 for 2018, 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) | 2018 | 6.8 hrs | 1.29 | 3.3 hrs | 1.02 |
| DTE Electric Company | 2018 | 8.1 hrs | 1.36 | 3.0 hrs | 1.04 |
| Tri-County Electric Coop (MI) | 2018 | 5.0 hrs | 1.98 | 4.2 hrs | 1.89 |
| 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 91% of Michigan's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 36,507 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. Isabella County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Isabella County, MI annual power outage report, 2018, 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/2018/michigan/isabella-county