County annual report · FIPS 30099
2024 Teton County, MT Power Outage Report
In 2024, customers in Teton County, MT went without power for an average of 10.3 hours, a total of 21K customer-hours (Montana average 8.5 hours). That ranks 11th worst of 51 Montana counties and 901st of 2,990 nationally.
Compared with MT, the US and 2023
Coverage line is EAGLE-I's share of Montana 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 | October 17, 2024 06:15 | October 17, 2024 11:45 | 5h 30m | 578 | 3,179 |
| 2 | May 8, 2024 11:45 | May 14, 2024 22:00 | 6d 10h | 407 | 2,704 |
| 3 | November 17, 2024 12:15 | November 17, 2024 20:30 | 8h 15m | 397 | 1,503 |
| 4 | August 15, 2024 06:45 | August 15, 2024 13:00 | 6h 15m | 363 | 2,269 |
| 5 | August 29, 2024 01:45 | August 29, 2024 05:15 | 3h 30m | 363 | 1,271 |
| 6 | February 23, 2024 22:00 | February 24, 2024 01:15 | 3h 15m | 347 | 1,126 |
| 7 | February 24, 2024 03:45 | February 24, 2024 05:15 | 1h 30m | 346 | 519 |
| 8 | November 12, 2024 20:15 | November 12, 2024 21:30 | 1h 15m | 345 | 431 |
| 9 | December 5, 2024 20:15 | December 5, 2024 22:00 | 1h 45m | 345 | 604 |
| 10 | June 15, 2024 22:45 | June 16, 2024 01:00 | 2h 15m | 239 | 301 |
Outage episodes by size in 2024: 20 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Sun River Electric Coop, 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 Montana's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,050 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 2020–2025.
Cite this report
MassOutage (massoutage.com), Teton County, MT 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/montana/teton-county