massoutage

2020 Montana Power Outage Report

In 2020, the average Montana customer went without power for about 5.6 hours — the 24th worst of any US state that year, 1.5× the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
5.6
Peak customers out
34,234
Rank (worst state)
24th
Counties affected
20

Montana outages over the decade

Average hours without power per customer, 2020 highlighted.

2.3h20151.8h20162.7h20171.9h20180.6h20195.6h20205.0h20213.5h20221.8h20238.5h20246.8h2025

Hardest-hit Montana counties in 2020

By peak customers out during the year's worst event.

1Flathead County34,2342Lewis and Clark County8,4043Silver Bow County7,1214Gallatin County6,9055Madison County6,1106Deer Lodge County6,0277Ravalli County5,9668Yellowstone County5,8539Cascade County5,61610Hill County4,61811Custer County4,48712Fergus County4,25213Lincoln County4,17014Sanders County3,56815Park County3,43516Missoula County3,42417Richland County2,70018Beaverhead County2,56019Pondera County2,49720Phillips County2,432

Biggest Montana outages of 2020

CountyBeganPeak customers out
Flathead CountyMay 31, 202034,234
Flathead CountyMay 2, 202010,342
Flathead CountyMay 7, 20208,795
Lewis and Clark CountyJune 3, 20208,404
Flathead CountyFebruary 1, 20207,241
Silver Bow CountyJune 13, 20207,121
Gallatin CountyOctober 8, 20206,905
Silver Bow CountyMay 28, 20206,874
Madison CountyNovember 8, 20206,110
Deer Lodge CountyOctober 18, 20206,027
Montana by year:20252024202320222021201920182017
Other states in 2020:LAMEOKIAALNC

Part of the 2020 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.