Power Out Map
– 0% of Stewart out 0 customers out in Tennessee

Power outage history

Stewart County Tennessee

14hours

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

3rd most of 73 in Tennessee 2.1× the national median

Worst outage on record Hurricane Harvey · Sep 1, 2017 26% of customers out · 90% back in 6.3 days
Hours without power, average customer per year 14h / yr State average 5.8 h · national median 6.6 h
Major outages a year 16.0 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 1hours Median across major outages, from the peak
Longest single outage 6.0days Hurricane Harvey, over 1% of customers out
Outage hours on storm days 60% Share falling on days with a NOAA storm report here
Worst year 2023 27 hours without power, average customer
Electricity customers 5,144 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 Stewart'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

2023 was the worst well-recorded year, at 27 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Stewart, hours without power per customer

StewartUS median countyTennessee average
0 10 20 30 40 50 36 ’17 9.0 ’18 11 ’19 10 ’20 16 ’21 7.8 ’22 27 ’23 16 ’24 12 ’25 US 6.6 TN 5.8

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
Sep 1, 2017 Hurricane Harvey 1,361 26% 6.0 d 6.3 d 156k
Mar 3, 2023 Windstorm 5,144 100% 2.6 d 46 h 93k
May 26, 2024 Thunderstorms 3,548 69% 37 h 24 h 45k
Jun 21, 2019 Thunderstorms 2,798 54% 46 h 11 h 18k
Dec 11, 2021 Tornadoes 2,682 52% 18 h 12 h 16k
May 4, 2021 Thunderstorms 1,912 37% 12 h 9.2 h 15k
May 16, 2025 Thunderstorms 2,329 45% 17 h 14 h 14k
Oct 26, 2019 Tropical Storm Olga 1,033 20% 48 h 46 h 13k
Jul 7, 2021 No storm report 5,144 100% 2.0 h 1.8 h 9.8k
Jul 12, 2020 Thunderstorms 3,141 61% 13 h 5.0 h 9.2k
Jun 12, 2021 Thunderstorms 2,306 45% 17 h 3.8 h 7.3k
Dec 9, 2023 Tornadoes 720 14% 12 h 12 h 6.3k

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 +12h

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

  • No storm on record 40%
  • Thunderstorms 29%
  • Windstorm 19%
  • Tornadoes 4.5%
  • Tropical storm 3.6%
  • Flooding 2.7%
  • Winter storm 0.7%

Who keeps the lights on

Utilities serving Stewart

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Cumberland Elec Member Corp Cooperative 221 171 2.67 13.8 102k

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 Tennessee

Where it is darkest

Hours / yr64+

All Tennessee 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 5,144 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 →