Granite County, MT Power Outages
Utilities serving Granite County, Montana don't yet share live outage data with DOE's ODIN feed. Check your electric company's outage map (listed below) for real-time status.
Granite County on the Montana outage map
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Current outages
Weather alerts
No active outage-relevant weather alerts from the National Weather Service.
Granite County power outage history
Every significant outage recorded in Granite County since late 2014, with likely causes from NOAA storm reports
Since late 2014, DOE's EAGLE-I monitoring system has recorded 95 significant power outages in Granite County, meaning events that left at least 1% of customers in the dark. The largest (Nov 5, 2022) came when high winds left 1,904 customers (83% of the county) without power.
From 2018 to 2025, the average customer here lost about 9 hr 32 min of power per year, more than the Montana average of 3 hr 56 min. That ranks 12th of 52 Montana counties for outage time, where 1st has the most.
May is the riskiest month: it accounted for 19% of all customer outage time from 2018 to 2025. On 84 days in that period, at least 5% of customers were out at the same time. Outage time in Granite County has risen recently: about 10 hr 59 min per customer per year in 2022–2025, versus 7 hr 36 min in 2018–2021.
The most recent significant outage on record (Dec 17–18, 2025) affected 246 customers (10.7%) amid high winds.
Worst outages on record
| # | When | Peak customers out | Days | Likely cause (NOAA) |
|---|---|---|---|---|
| 1 | Nov 5, 2022 | 1,904(83%) | 1 | High winds |
| 2 | May 15–17, 2020 | 1,673(73%) | 3 | Winter storm |
| 3 | May 23–24, 2024 | 1,592(69.4%) | 2 | Winter storm |
| 4 | Feb 3, 2024 | 1,446(63.1%) | 1 | Winter storm |
| 5 | May 3–5, 2023 | 1,425(62.1%) | 3 | Flooding |
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 Granite County?
Electric companies with service territory in Granite County (EIA-861, 2025)
| Utility | Type | Customers (MT) | Avg. outage time / yr | Live data |
|---|---|---|---|---|
| NorthWestern Energy (Montana) | Investor Owned | 438,851 | Not reporting | |
| Missoula Electric Coop, Inc | Cooperative | 17,426 | Not reporting | |
| Bonneville Power Administration | Federal | — | 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 Granite County outage headlines in the past week.
Nearby counties
Granite County power outage FAQ
Is the power out in Granite County right now?
No outages are currently reported for Granite 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 Granite County?
According to EIA-861 service territory data, NorthWestern Energy LLC - (MT), Missoula Electric Coop, Inc, Bonneville Power Administration provide electric service in Granite County, Montana.
What was the worst power outage in Granite County?
The largest outage recorded by DOE's EAGLE-I system since 2014 was Nov 5, 2022. It peaked at 1,904 customers without power (83% of the county). NOAA storm reports for that period point to high winds.
How often does the power go out in Granite County?
EAGLE-I has recorded 95 significant outages here since late 2014. From 2018 to 2025 the average customer lost about 9 hr 32 min of power per year, and on 84 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. "Granite County, MT Power Outages." Accessed November 3, 2026. https://poweroutagetracker.com/outages/montana/granite-county