County annual report · FIPS 56039
2024 Teton County, WY Power Outage Report
In 2024, customers in Teton County, WY went without power for an average of 1.4 hours, a total of 25K customer-hours (Wyoming average 2.4 hours). That ranks 16th worst of 20 Wyoming counties and 2609th of 2,990 nationally.
Compared with WY, the US and 2023
Coverage line is EAGLE-I's share of Wyoming customers tracked each year.
Biggest outages in Teton County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 21, 2024 13:45 | May 21, 2024 19:30 | 5h 45m | 863 | 2,479 |
| 2 | October 24, 2024 16:15 | October 24, 2024 17:45 | 1h 30m | 542 | 614 |
| 3 | September 17, 2024 04:00 | September 17, 2024 10:15 | 6h 15m | 494 | 1,495 |
| 4 | November 16, 2024 22:00 | November 17, 2024 07:45 | 9h 45m | 392 | 3,159 |
| 5 | June 22, 2024 19:15 | June 24, 2024 14:15 | 1d 19h | 381 | 4,883 |
| 6 | June 9, 2024 09:45 | June 10, 2024 20:30 | 1d 10h | 378 | 2,295 |
| 7 | June 2, 2024 09:45 | June 2, 2024 12:45 | 3h | 287 | 557 |
| 8 | March 2, 2024 10:45 | March 3, 2024 22:30 | 1d 11h | 206 | 1,569 |
| 9 | April 20, 2024 13:45 | April 20, 2024 16:00 | 2h 15m | 192 | 360 |
| 10 | April 1, 2024 09:00 | April 1, 2024 09:45 | 45m | 186 | 138 |
Outage episodes by size in 2024: 12 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 Teton County reported on EIA Form 861 for 2024, 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 |
|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2024 | 3.9 hrs | 1.30 | 2.0 hrs | 0.95 |
| High Plains Power Inc | 2024 | 5.2 hrs | - | 5.2 hrs | - |
| Fall River Rural Elec Coop Inc | 2024 | 14 min | 0.11 | 10 min | 0.08 |
| Lower Valley Energy 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 n/a of Wyoming's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,592 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. Teton County has data for 2018–2025.
Cite this report
MassOutage (massoutage.com), Teton County, WY annual power outage report, 2024, 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/2024/wyoming/teton-county