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

Power outage history

Hancock County Tennessee

10hours

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

10th most of 73 in Tennessee 1.6× the national median

Worst outage on record Hurricane Helene · Sep 27, 2024 46% of customers out · 90% back in 2.8 days
Hours without power, average customer per year 10h / yr State average 5.8 h · national median 6.6 h
Major outages a year 7.1 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 4.4days Hurricane Helene, over 1% of customers out
Outage hours on storm days 33% Share falling on days with a NOAA storm report here
Worst year 2024 23 hours without power, average customer
Electricity customers 4,277 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 Hancock'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 23 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Hancock, hours without power per customer

HancockUS median countyTennessee average
0 10 20 30 0.5 ’19 15 ’20 7.5 ’21 10 ’22 8.0 ’23 23 ’24 6.9 ’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 27, 2024 Hurricane Helene 1,984 46% 4.4 d 2.8 d 66k
Oct 15, 2020 No storm report 602 14% 3.4 d 37 h 50k
Jan 8, 2022 No storm report 1,233 29% 4.2 h 4.2 h 5.2k
Dec 19, 2025 No storm report 1,459 34% 12 h 3.8 h 4.7k
Apr 1, 2023 No storm report 1,742 41% 15 h 5.5 h 4.3k
Aug 10, 2022 No storm report 823 19% 5.0 h 6.0 h 3.9k
Sep 15, 2025 No storm report 4,277 100% 1.8 h 1.0 h 3.6k
Nov 11, 2024 No storm report 546 13% 6.2 h 5.5 h 3.0k
May 27, 2024 Thunderstorms 722 17% 13 h 9.2 h 2.7k
Oct 3, 2022 No storm report 441 10% 6.0 h 6.0 h 2.6k
Jul 4, 2023 No storm report 113 3% 24 h – 2.6k
Oct 31, 2022 No storm report 1,258 29% 1.8 h 1.5 h 2.2k

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 +6h

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

  • No storm on record 67%
  • Tropical storm 27%
  • Thunderstorms 2.9%
  • Winter storm 1.1%
  • Flooding 0.6%

Who keeps the lights on

Utilities serving Hancock

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
Powell Valley Electric Coop Cooperative 180 162 4.59 12.2 21k

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 4,277 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 →