Big Horn County, MT Power Outages
Only some utilities serving Big Horn County, Montana share live outage data (Powder River Energy Corp), and none of them report outages here right now. NorthWestern Energy LLC - (MT) and Yellowstone Valley Elec Co-op do not share live data, so check their outage maps for real-time status.
Big Horn County on the Montana outage map
- Normal
- Minor
- Moderate
- Major
- Severe
- Limited data
Current outages
Weather alerts
No active outage-relevant weather alerts from the National Weather Service.
Big Horn County power outage history
Every significant outage recorded in Big Horn County since late 2014, with likely causes from NOAA storm reports
Since late 2014, DOE's EAGLE-I monitoring system has recorded 18 significant power outages in Big Horn County, meaning events that left at least 1% of customers in the dark. The largest (Apr 17–18, 2025) came when a winter storm left 1,779 customers (25.9% of the county) without power.
From 2018 to 2025, the average customer here lost about 1 hr 4 min of power per year, less than the Montana average of 3 hr 56 min. That ranks 45th of 52 Montana counties for outage time, where 1st has the most.
July is the riskiest month: it accounted for 34% of all customer outage time from 2018 to 2025. On 3 days in that period, at least 5% of customers were out at the same time. Outage time in Big Horn County has risen recently: about 1 hr 40 min per customer per year in 2022–2025, versus 16 min in 2018–2021.
The most recent significant outage on record (Nov 13–14, 2025) affected 129 customers (1.9%) amid high winds.
Worst outages on record
| # | When | Peak customers out | Days | Likely cause (NOAA) |
|---|---|---|---|---|
| 1 | Apr 17–18, 2025 | 1,779(25.9%) | 2 | Winter storm |
| 2 | Jun 11–12, 2022 | 1,778(25.9%) | 2 | Severe thunderstorms |
| 3 | Jun 12–14, 2025 | 304(4.4%) | 3 | Hail and lightning |
| 4 | Nov 30, 2023 | 187(2.7%) | 1 | No major storm reported |
| 5 | Nov 13–14, 2025 | 129(1.9%) | 2 | High winds |
Hours without power per customer, by year
When outages happen
Source: DOE/ORNL EAGLE-I recorded electricity outages, 2014–2025 (CC BY 4.0), with likely causes from the NOAA NCEI Storm Events Database. EAGLE-I coverage was partial before 2018, so averages use 2018–2025. Peak counts are the highest number of customers out at one time.
Who provides electricity in Big Horn County?
Electric companies with service territory in Big Horn County (EIA-861, 2025)
| Utility | Type | Customers (MT) | Avg. outage time / yr | Live data |
|---|---|---|---|---|
| NorthWestern Energy (Montana) | Investor Owned | 438,851 | Not reporting | |
| Yellowstone Valley Elec Co-op | Cooperative | 23,683 | Not reporting | |
| Tongue River Electric Coop Inc | Cooperative | 5,229 | Not reporting | |
| Big Horn County Elec Coop, Inc | Cooperative | 3,709 | Not reporting | |
| Mid-Yellowstone Elec Coop, Inc | Cooperative | 2,053 | Not reporting | |
| Powder River Energy Corp | Cooperative | 173 | Reporting | |
| Big Horn Rural Electric Co | Cooperative | 72 | Not reporting | |
| WAPA-- Western Area Power Administration | Federal | 16 | Not reporting |
Customer counts are each utility's statewide total in Montana. Source: U.S. Energy Information Administration, Form EIA-861 & Electric Power Annual.
Local outage news
No Big Horn County outage headlines in the past week.
Big Horn County power outage FAQ
Is the power out in Big Horn County right now?
No outages are currently reported for Big Horn County by participating utilities. Live coverage is limited here, so If your power is out, report it to your electric company.
Which electric company serves Big Horn County?
According to EIA-861 service territory data, NorthWestern Energy LLC - (MT), Yellowstone Valley Elec Co-op, Tongue River Electric Coop Inc, Big Horn County Elec Coop, Inc and 4 others provide electric service in Big Horn County, Montana.
What was the worst power outage in Big Horn County?
The largest outage recorded by DOE's EAGLE-I system since 2014 was Apr 17–18, 2025. It peaked at 1,779 customers without power (25.9% of the county). NOAA storm reports for that period point to winter storm.
How often does the power go out in Big Horn County?
EAGLE-I has recorded 18 significant outages here since late 2014. From 2018 to 2025 the average customer lost about 1 hr 4 min of power per year, and on 3 days at least 5% of customers were out at once.
Cite this page
You may reuse our derived data under CC BY 4.0 with attribution. Underlying government data is public domain.
PowerOutageTracker.com. "Big Horn County, MT Power Outages." Accessed November 3, 2026. https://poweroutagetracker.com/outages/montana/big-horn-county