County annual report · FIPS 56045
2021 Weston County, WY Power Outage Report
In 2021, customers in Weston County, WY went without power for an average of 6.4 hours, a total of 25K customer-hours (Wyoming average 2.2 hours). That ranks 3rd worst of 20 Wyoming counties and 1104th of 2,974 nationally.
Compared with WY, the US and 2020
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Weston 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 | October 13, 2021 07:15 | October 13, 2021 19:30 | 12h 15m | 847 | 5,297 |
| 2 | May 23, 2021 21:45 | May 24, 2021 00:15 | 2h 30m | 773 | 781 |
| 3 | August 14, 2021 21:30 | August 14, 2021 23:30 | 2h | 758 | 573 |
| 4 | August 16, 2021 13:30 | August 16, 2021 13:45 | 15m | 758 | 190 |
| 5 | May 26, 2021 23:00 | May 27, 2021 00:30 | 1h 30m | 755 | 755 |
| 6 | July 19, 2021 20:15 | July 19, 2021 22:00 | 1h 45m | 585 | 814 |
| 7 | October 14, 2021 14:30 | October 14, 2021 15:15 | 45m | 584 | 438 |
| 8 | July 12, 2021 13:15 | July 12, 2021 16:30 | 3h 15m | 510 | 1,027 |
| 9 | July 10, 2021 01:30 | July 10, 2021 11:00 | 9h 30m | 301 | 288 |
| 10 | July 7, 2021 05:45 | July 8, 2021 02:45 | 21h | 299 | 848 |
Outage episodes by size in 2021: 40 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 Weston 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 |
|---|---|---|---|---|---|
| Black Hills Power, Inc. | 2021 | 2.6 hrs | 1.17 | 41 min | 0.32 |
| Powder River Energy Corp | 2021 | 5.4 hrs | 2.15 | 3.9 hrs | 1.91 |
| Niobrara Electric Assn, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 71% of Wyoming's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,933 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. Weston County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Weston County, WY 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/wyoming/weston-county