County annual report · FIPS 19189
2018 Winnebago County, IA Power Outage Report
In 2018, customers in Winnebago County, IA went without power for an average of 3.0 hours, a total of 22K customer-hours (Iowa average 2.2 hours). That ranks 28th worst of 99 Iowa counties and 1506th of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Winnebago 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 | October 16, 2018 21:15 | October 17, 2018 02:15 | 5h | 2,028 | 6,593 |
| 2 | April 6, 2018 14:15 | April 6, 2018 15:30 | 1h 15m | 1,327 | 333 |
| 3 | June 21, 2018 13:00 | June 21, 2018 15:30 | 2h 30m | 1,068 | 1,081 |
| 4 | March 24, 2018 05:45 | March 24, 2018 19:45 | 14h | 929 | 3,872 |
| 5 | June 9, 2018 20:15 | June 11, 2018 14:30 | 1d 18h | 793 | 831 |
| 6 | May 2, 2018 11:45 | May 2, 2018 12:30 | 45m | 498 | 374 |
| 7 | May 28, 2018 23:15 | May 29, 2018 04:45 | 5h 30m | 385 | 1,662 |
| 8 | August 28, 2018 03:30 | August 28, 2018 10:30 | 7h | 347 | 716 |
| 9 | June 21, 2018 02:15 | June 21, 2018 04:00 | 1h 45m | 207 | 362 |
| 10 | March 19, 2018 02:30 | March 19, 2018 03:45 | 1h 15m | 205 | 256 |
Outage episodes by size in 2018: 15 reached 100+ customers, 3 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 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 |
|---|---|---|---|---|---|
| Heartland Power Coop | 2018 | 1.8 hrs | 1.14 | 1.7 hrs | 1.14 |
| Interstate Power and Light Co | - | - | - | - | - |
| Prairie Energy Coop | - | - | - | - | - |
| City of Forest City- (IA) | - | - | - | - | - |
| City of Lake Mills | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of Iowa's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,213 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, IA 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/iowa/winnebago-county