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

Power outage history

Robertson County Tennessee

5.1hours

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

31st most of 73 in Tennessee 22% below the national median

Worst outage on record Mar 4, 2023 30% of customers out · 90% back in 3.0 hours
Hours without power, average customer per year 5.1h / yr State average 5.8 h · national median 6.6 h
Major outages a year 3.0 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 3.8days Mar 3, 2023, over 1% of customers out
Outage hours on storm days 68% Share falling on days with a NOAA storm report here
Worst year 2023 16 hours without power, average customer
Electricity customers 31,945 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 Robertson'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 16 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Robertson, hours without power per customer

RobertsonUS median countyTennessee average
0 5 10 15 20 2.3 ’15 4.3 ’16 3.0 ’17 5.2 ’18 5.2 ’19 2.2 ’20 2.7 ’21 3.6 ’22 16 ’23 2.5 ’24 3.0 ’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
Mar 3, 2023 Windstorm 9,442 30% 3.8 d 3.0 h 340k
Jun 21, 2019 Thunderstorms 5,881 18% 40 h 17 h 56k
Dec 9, 2018 Winter storm 6,821 21% 21 h 13 h 49k
Aug 6, 2019 Thunderstorms 6,716 21% 16 h 11 h 31k
Jul 8, 2016 Thunderstorms 3,858 12% 11 h 9.2 h 17k
May 30, 2018 Tropical Storm Alberto 2,227 7% 11 h 6.0 h 16k
Dec 4, 2018 No storm report 3,615 11% 4.2 h 4.8 h 15k
Jul 20, 2023 Thunderstorms 3,038 10% 9.2 h 5.8 h 15k
Jun 30, 2023 Thunderstorms 3,117 10% 11 h 9.2 h 15k
Aug 27, 2023 No storm report 4,830 15% 5.5 h 4.5 h 13k
Aug 12, 2023 Thunderstorms 6,550 21% 4.2 h 2.2 h 13k
Jul 6, 2016 Thunderstorms 3,069 10% 7.5 h 5.2 h 12k

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 +2h 90% by +10h

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

  • Windstorm 34%
  • No storm on record 32%
  • Thunderstorms 22%
  • Winter storm 6.0%
  • Tornadoes 2.1%
  • Tropical storm 1.8%
  • Flooding 1.5%
  • Ice storm 1.1%

Who keeps the lights on

Utilities serving Robertson

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
Nashville Electric Service Municipal 0 83 0.00 14.0 425k
Cumberland Elec Member Corp Cooperative 221 171 2.67 13.8 102k
City of Springfield Municipal – – – 12.4 7.7k

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 31,945 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 →