Power Outages in Jefferson County, MT
NorthWestern Energy LLC - (MT) and Vigilante Electric Coop, Inc publish only a system-wide total, not county figures. There is no live feed for Bonneville Power Administration and NorthWestern Energy. In 2025, the average customer here lost power for about 20.8 hours.
Jefferson County, MT is served by 4 tracked utilities.
Cite this data
- URL
- https://massoutage.com/montana/jefferson-county
- As of
- Not available
- Publisher
- MassOutage
MassOutage, "Power Outages in Jefferson County, MT". https://massoutage.com/montana/jefferson-county
NorthWestern Energy LLC - (MT) and Vigilante Electric Coop, Inc publish no county-level figures.
No live feed for Bonneville Power Administration and NorthWestern Energy: outages in theirservice area won't show here.
0.0%of this county's ~5,459 customers are served by utilities with a county-level live feed.
We can't see outages for: Bonneville Power Administration, NorthWestern Energy. Their customers are not in any number on this page; check their own outage maps.
System-wide total only, no county split: NorthWestern Energy LLC - (MT), Vigilante Electric Coop, Inc.
| Utility | Feed | Out | Served | % out | Small outages | Incidents | Utility ETR | As of |
|---|---|---|---|---|---|---|---|---|
| NorthWestern Energy LLC - (MT) | Live · total only | not by county | - | - | - | - | - | - |
| Vigilante Electric Coop, Inc | Live · total only | not by county | - | - | - | - | - | - |
| Bonneville Power Administration | No live feed | can't see | - | - | - | - | - | - |
| NorthWestern Energy | No live feed | can't see | - | - | - | - | - | - |
Electricity-dependent residents
HHS emPOWER · data October 7, 2026Medicare beneficiaries in Jefferson Countywho rely on electricity-dependent medical equipment (ventilators, oxygen concentrators, home dialysis, powered wheelchairs, and more). HHS reports counts of 1–10 as “≤11”. Medicare only, so the full at-risk population is larger.
By ZIP code (5)
| ZIP | Power-dependent | Ventilators | O2 concentrators | Home dialysis |
|---|---|---|---|---|
| 59634 | 103 | 0 | 88 | 0 |
| 59759 | 92 | ≤11 | 84 | ≤11 |
| 59632 | 62 | 0 | 55 | 0 |
| 59721 | ≤11 | 0 | ≤11 | 0 |
| 59631 | ≤11 | 0 | ≤11 | 0 |
Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.
Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for Jefferson County or any town and utility in it.
No active NWS alerts for Jefferson County right now.
Jefferson County has been under 22 National Weather Service alerts recently, most recently a Dense Fog Advisory on October 14, 2026.
- Dense Fog Advisory ×8
- Winter Storm Warning ×5
- Flash Flood Watch ×3
- Red Flag Warning ×2
- Winter Weather Advisory ×2
- Winter Storm Watch ×1
Latest Jefferson County, MT outage updates
A running log of how this outage has changed, updated automatically as utilities report in.
- RESOLVED
Power restored after 8d 4h
- OUTAGE BEGAN
Outage began: 173 customers out (3.3% of the county)
- RESOLVED
Power restored after 3h 15m
- OUTAGE BEGAN
Outage began: 159 customers out (3.0% of the county)
Hardest-hit cities in Jefferson County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in Jefferson County went about 20.8 hours without power. Peak simultaneous outage on record reached 5,322 customers.
The US EIA reports Montana utilities averaged 4.8 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 20.8 hrs.
Worst year here was 2025 (peak 5,322 customers out) · decade average 6.1 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2019 | 1 | 1 | 0.0 |
| 2020 | 180 | 557 | 3.6 |
| 2021 | 205 | 1,694 | 4.8 |
| 2022 | 179 | 1,442 | 3.4 |
| 2023 | 183 | 263 | 1.6 |
| 2024 | 222 | 2,681 | 8.8 |
| 2025 | 183 | 5,322 | 20.8 |
Cost of power in Jefferson County
ENERGY & AI DEMAND →Estimated residential electricity price for Jefferson County, customer-weighted across the utilities serving it (US EIA, 2025). Retail prices aren't published at the county level; this is a derived estimate.
- NorthWestern Energy LLC - (MT)14.4¢333,711 cust
Weighted by each utility's residential customer count (utilities report customers at the state level; a per-county share isn't published). Rising retail prices track a national demand surge; see energy & the data-center boom.
Relatively Moderate wildfire exposure · 6.1 hrs/yr of outages over the last decade.
Power outages in Jefferson County: FAQ
- How often does Jefferson County, MT lose power?
- Based on EAGLE-I records, Jefferson County, MT logged 183 distinct outage events in 2025, averaging about 20.8 hours without power per customer over the year.
- What was the worst power outage in Jefferson County, MT?
- The largest tracked outage peaked at 5,322 customers without power, beginning December 17, 2025 and lasting about 4d 6h.
- Is there a power outage in Jefferson County, MT right now?
- No major outage is currently reported for Jefferson County, MT. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve Jefferson County, MT?
- Tracked electric providers include NorthWestern Energy, NorthWestern Energy LLC - (MT), Vigilante Electric Coop, Inc.
Outages are tracked at the county level; these ZIP codes fall within Jefferson County.
59631, 59632, 59634, 59638, 59721, 59759
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| NorthWestern Energy LLC - (MT) | 2.1 hrs | Live · total only | - |
| Bonneville Power Administration | - | No live feed | - |
| NorthWestern Energy | - | No live feed | - |
| Vigilante Electric Coop, Inc | - | Live · total only | - |
Data from DOE/ORNL ODIN, DOE EAGLE-I, EIA Form 861 (utility reliability), EIA electricity retail prices and FEMA National Risk Index, every source we read. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Montana customers). Machine-readable data: /api/v1/counties/30043 and /api/v1/counties/30043/history.