Power Out Map
– 0% of Mason out 0 customers out in Washington

Power outage history

Mason County Washington

6.2hours

without power for the average customer in a typical year, 2018–2025

16th most of 31 in Washington close to the national median

Worst outage on record Jan 13, 2021 62% of customers out · 90% back in 7.2 hours
Hours without power, average customer per year 6.2h / yr State average 5.3 h · national median 6.6 h
Major outages a year 2.3 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 6hours Median across major outages, from the peak
Longest single outage 24hours Jan 8, 2024, over 1% of customers out
Outage hours on storm days 13% Share falling on days with a NOAA storm report here
Worst year 2021 9.8 hours without power, average customer
Electricity customers 37,529 ORNL customer model · 7 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Mason's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2021 was the worst well-recorded year, at 9.8 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Mason, hours without power per customer

MasonUS median countyWashington average
0 2 4 6 8 10 12 ’15 ’16 ’17 ’18 1.1 ’19 6.0 ’20 9.8 ’21 9.3 ’22 4.2 ’23 7.1 ’24 5.5 ’25 US 6.6 WA 5.3

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Jan 12, 2021 Flooding 23,192 62% 23 h 7.2 h 137k
Dec 18, 2024 No storm report 9,672 26% 18 h 11 h 61k
Jun 5, 2021 No storm report 4,171 11% 22 h 5.5 h 56k
Dec 23, 2022 No storm report 3,980 11% 22 h 13 h 52k
Mar 22, 2022 No storm report 5,291 14% 13 h 8.2 h 52k
Jul 16, 2025 No storm report 5,707 15% 7.0 h 2.0 h 39k
Sep 7, 2020 No storm report 6,681 18% 21 h 30 min 33k
Oct 13, 2020 No storm report 4,770 13% 16 h 14 h 31k
Jan 8, 2024 No storm report 4,093 11% 24 h 1.8 h 30k
Oct 25, 2025 No storm report 5,354 14% 7.2 h 5.5 h 27k
Feb 24, 2025 Thunderstorms 5,315 14% 19 h 4.0 h 27k
Feb 15, 2024 No storm report 4,432 12% 12 h 7.5 h 25k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +4h 90% by +10h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Mason from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 87%
  • Flooding 10%
  • Thunderstorms 2.4%

Who keeps the lights on

Utilities serving Mason

As each utility reports to the Energy Information Administration for its whole Washington territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
City of Tacoma Municipal 172 70 0.89 11.4 178k
PUD No 1 of Mason County WA – – – – 58k
PUD No 3 of Mason County Political Subdivision 419 223 1.91 14.4 34k

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across Washington

Where it is darkest

Hours / yr64+

All Washington counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 37,529 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →