Missoula County, Montana Power Outages, 2020 to 2023

Missoula County, Montana had 4 major outages from 2020 to 2023

Lower outage time among US counties

Residents here averaged 0.31 times the US outage time per person and 0.53 times the Montana rate. It ranks 26 of 34 in the state, where 1 has the most. Data confidence: Medium, with 4 years of records.

1.0major outages per year

2 of 4years with a major outage

25 hrslongest major outage

Nov, Febhardest months

November and February made up 30% of this county's outage time. The largest outage on record began Feb 1, 2020, reached 3,424 customers, and left at least 200 customers out for 24.8 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.

50K

100K

150K

200K

2020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2020	105,926	32	2
2021	94,261	34	2
2022	69,958	30	0
2023	96,985	39	0

When outages hit

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

10%

15%

20%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Feb 1, 2020	24.8	3,424	34,262
Nov 16, 2021	20.0	3,684	25,250
Jun 9, 2020	28.2	957	13,044
Aug 2, 2021	2.2	6,378	12,815
Oct 14, 2020	5.8	2,013	11,352

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.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

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.