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

Power outage history

Florence County Wisconsin

14hours

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

6th most of 72 in Wisconsin 2.1× the national median

Worst outage on record Mar 31, 2025 62% of customers out · 90% back in 24 hours
Hours without power, average customer per year 14h / yr State average 3.5 h · national median 6.6 h
Major outages a year 6.0 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 60% Share falling on days with a NOAA storm report here
Worst year 2025 37 hours without power, average customer
Electricity customers 2,842 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 Florence'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 37 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Florence, hours without power per customer

FlorenceUS median countyWisconsin average
0 10 20 30 40 50 5.3 ’15 6.1 ’16 38 ’17 8.9 ’18 16 ’19 7.6 ’20 13 ’21 16 ’22 5.2 ’23 6.3 ’24 37 ’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 1,764 62% 4.9 d 24 h 95k
Jun 11, 2017 No storm report 2,660 94% 2.4 d 2.1 d 86k
Nov 27, 2019 Winter storm 2,842 100% 2.6 d 8.8 h 31k
Mar 23, 2022 Winter storm 907 32% 2.1 d 9.2 h 20k
Dec 16, 2021 No storm report 1,167 41% 2.0 d 9.0 h 15k
Jul 27, 2021 Thunderstorms 795 28% 2.2 d 18 h 13k
May 9, 2022 No storm report 1,164 41% 27 h 22 h 8.9k
Aug 9, 2020 Tornadoes 389 14% 28 h 28 h 8.1k
Oct 3, 2018 No storm report 796 28% 15 h 2.5 h 6.0k
Nov 18, 2015 No storm report 1,136 40% 18 h 4.5 h 5.6k
Mar 7, 2017 No storm report 234 8% 42 h 16 h 5.0k
Jul 27, 2023 Tornadoes 339 12% 23 h 22 h 4.9k

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 +22h

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

  • No storm on record 40%
  • Ice storm 32%
  • Winter storm 19%
  • Tornadoes 4.3%
  • Thunderstorms 4.3%

Who keeps the lights on

Utilities serving Florence

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
Florence Utility Comm Municipal 506 58 2.46 16.9 1.4k

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 2,842 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 →