Power Out Map
– 0% of Iosco out 0 customers out in Michigan

Power outage history

Iosco County Michigan

27hours

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

16th most of 83 in Michigan 4.1× the national median

Worst outage on record Nov 5, 2022 54% of customers out · 90% back in 3.1 days
Hours without power, average customer per year 27h / yr State average 13 h · national median 6.6 h
Major outages a year 6.3 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 5hours Median across major outages, from the peak
Longest single outage 5.6days Jan 9, 2024, over 1% of customers out
Outage hours on storm days 40% Share falling on days with a NOAA storm report here
Worst year 2024 41 hours without power, average customer
Electricity customers 14,310 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 Iosco'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

2024 was the worst well-recorded year, at 41 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Iosco, hours without power per customer

IoscoUS median countyMichigan average
0 10 20 30 40 50 39 ’15 5.8 ’16 20 ’17 12 ’18 14 ’19 39 ’20 38 ’21 38 ’22 6.7 ’23 41 ’24 23 ’25 MI 13 US 6.6

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
Nov 5, 2022 No storm report 7,660 54% 3.3 d 3.1 d 380k
Jul 19, 2020 Thunderstorms 9,443 66% 2.3 d 41 h 298k
Jun 25, 2024 Windstorm 14,310 100% 2.2 d 36 h 243k
Aug 2, 2015 Thunderstorms 5,051 35% 3.0 d 2.2 d 242k
Dec 16, 2021 Windstorm 6,309 44% 3.6 d 2.6 d 239k
Dec 24, 2015 No storm report 3,967 28% 4.3 d 3.0 d 207k
Jan 9, 2024 Winter storm 3,561 25% 5.6 d 33 h 152k
Apr 29, 2025 No storm report 8,777 61% 32 h 25 h 121k
Dec 5, 2017 No storm report 5,681 40% 2.3 d 34 h 104k
Dec 11, 2021 No storm report 3,220 23% 2.2 d 48 h 80k
Apr 6, 2017 No storm report 5,522 39% 34 h 21 h 64k
Aug 27, 2024 No storm report 2,432 17% 2.1 d 42 h 64k

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 +22h 90% by +42h

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

  • No storm on record 60%
  • Windstorm 18%
  • Thunderstorms 15%
  • Winter storm 6.6%
  • Ice storm 0.9%

Who keeps the lights on

Utilities serving Iosco

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Consumers Energy Co Investor Owned 820 164 1.40 20.7 1.7M

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 Michigan

Where it is darkest

Hours / yr64+

All Michigan 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 14,310 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 →