Power Out Map
– 0% of Forest out 0 customers out in Wisconsin

Power outage history

Forest County Wisconsin

26hours

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

2nd most of 72 in Wisconsin 4.0× the national median

Worst outage on record Mar 30, 2025 100% of customers out · 90% back in 4.3 days
Hours without power, average customer per year 26h / yr State average 3.5 h · national median 6.6 h
Major outages a year 8.0 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 3hours Median across major outages, from the peak
Longest single outage 4.9days Mar 29, 2025, over 1% of customers out
Outage hours on storm days 67% Share falling on days with a NOAA storm report here
Worst year 2025 3.7 days without power, average customer
Electricity customers 6,340 ORNL customer model · 8 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 Forest'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

2025 was the worst well-recorded year, at 3.7 days for the average customer. Hatched years have a thin record and are left out of the averages.

Forest, hours without power per customer

ForestUS median countyWisconsin average
0 20 40 60 80 100 120 6.7 ’15 9.6 ’16 16 ’17 6.6 ’18 28 ’19 7.5 ’20 27 ’21 23 ’22 14 ’23 14 ’24 90 ’25 US 6.6 WI 3.5

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
Mar 29, 2025 Ice storm 6,340 100% 4.9 d 4.3 d 537k
Dec 15, 2021 No storm report 2,310 36% 3.2 d 39 h 76k
Mar 23, 2022 Winter storm 3,610 57% 2.5 d 27 h 75k
Jul 26, 2021 Thunderstorms 2,924 46% 2.7 d 26 h 72k
Nov 27, 2019 Winter storm 6,340 100% 46 h 21 h 49k
Jun 11, 2017 Thunderstorms 2,141 34% 2.2 d 42 h 46k
Jul 19, 2019 No storm report 4,614 73% 21 h 18 h 44k
Apr 1, 2023 Winter storm 3,038 48% 39 h 26 h 43k
Apr 3, 2024 Winter storm 1,695 27% 38 h 24 h 26k
Jul 27, 2023 No storm report 2,488 39% 40 h 30 min 25k
Mar 7, 2017 No storm report 842 13% 2.1 d 19 h 20k
Aug 3, 2022 Thunderstorms 2,498 39% 15 h 11 h 15k

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 +6h 90% by +26h

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 Forest from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Ice storm 42%
  • No storm on record 33%
  • Winter storm 16%
  • Thunderstorms 8.2%
  • Tornadoes 0.6%

Who keeps the lights on

Utilities serving Forest

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Wisconsin Electric Power Co Investor Owned 185 93 0.90 20.5 1.1M
Wisconsin Public Service Corp Investor Owned 630 107 1.44 17.2 416k

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 Wisconsin

Where it is darkest

Hours / yr64+

All Wisconsin 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 6,340 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 →