County annual report · FIPS 46089
2020 McPherson County, SD Power Outage Report
In 2020, customers in McPherson County, SD went without power for an average of 3.8 hours, a total of 4,659 customer-hours (South Dakota average 4.6 hours). That ranks 29th worst of 62 South Dakota counties and 1654th of 3,019 nationally.
Compared with SD, the US and 2019
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in McPherson County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 4, 2020 10:15 | November 4, 2020 11:15 | 1h | 654 | 654 |
| 2 | March 15, 2020 02:00 | March 15, 2020 08:15 | 6h 15m | 642 | 1,661 |
| 3 | July 18, 2020 03:45 | July 18, 2020 09:15 | 5h 30m | 632 | 1,547 |
| 4 | July 23, 2020 22:15 | July 24, 2020 00:00 | 1h 45m | 254 | 441 |
| 5 | July 5, 2020 00:30 | July 5, 2020 02:00 | 1h 30m | 241 | 78 |
| 6 | March 20, 2020 16:45 | March 20, 2020 18:30 | 1h 45m | 211 | 60 |
| 7 | July 8, 2020 08:45 | July 8, 2020 09:45 | 1h | 67 | 64 |
| 8 | October 9, 2020 15:15 | October 9, 2020 17:15 | 2h | 49 | 87 |
| 9 | August 27, 2020 13:00 | August 27, 2020 16:00 | 3h | 13 | 39 |
| 10 | November 29, 2020 04:30 | November 29, 2020 04:45 | 15m | 11 | 3 |
Outage episodes by size in 2020: 6 reached 100+ customers, 0 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 McPherson County reported on EIA Form 861 for 2020, 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 |
|---|---|---|---|---|---|
| Northern Electric Coop, Inc | 2020 | 1.7 hrs | 0.62 | 1.6 hrs | 0.56 |
| FEM Electric Assn, Inc | 2018 | 3.8 hrs | 2.21 | 3.8 hrs | 2.21 |
| Montana-Dakota Utilities Co | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 79% of South Dakota's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,223 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. McPherson County has data for 2017, 2019–2025.
Cite this report
MassOutage (massoutage.com), McPherson County, SD annual power outage report, 2020, 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/2020/south-dakota/mcpherson-county