Powell County power outages

Montana outage history from 2020 to 2023, with the largest outages and a backup battery estimate.

Powell County, Montana had 2 major outages from 2020 to 2023

Below middle outage time among US counties

Residents here averaged 0.75 times the US outage time per person and 1.30 times the Montana rate. It ranks 11 of 34 in the state, where 1 has the most. Data confidence: Medium, with 4 years of records.

0.5major outages per year
1 of 4years with a major outage
28 hrslongest major outage
Jun, Sephardest months

June and September made up 85% of this county's outage time. The largest outage on record began Jun 9, 2020, reached 1,579 customers, and left at least 200 customers out for 28.2 hours.

Outage time per resident, rated Montana counties
MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

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20K
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2020'202021'212022'222023'23
Show yearly numbers
YearCustomer-hoursReported outagesMajor outages
202044,802122
20212,68120
20222,76720
20232,11410

When outages hit

Share of this county's customer-hours by month.

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20%
40%
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80%
JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start dateHoursPeak customersCustomer-hours
Jun 9, 202028.21,57919,751
Jun 8, 202021.51,91616,079
Jun 6, 20203.81,9823,362
Sep 22, 20227.84392,568
Nov 12, 20202.59182,295

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

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How to read this

  • A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
  • Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
  • Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.