– 0% of Shelby out 0 customers out in Tennessee

Power outage history

Shelby County Tennessee

15hours

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

1st most of 73 in Tennessee 2.3× the national median

Worst outage on record Feb 3, 2022 33% of customers out · 90% back in 7.1 days

Hours without power, average customer per year 15h / yr State average 5.8 h · national median 6.6 h

Major outages a year 0.6 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 44hours Median across major outages, from the peak

Longest single outage 9.2days Feb 3, 2022, over 1% of customers out

Outage hours on storm days 93% Share falling on days with a NOAA storm report here

Worst year 2023 41 hours without power, average customer

Electricity customers 422,904 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 Shelby'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 41 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Shelby, hours without power per customer

ShelbyUS median countyTennessee average

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
Feb 3, 2022	Ice storm	137,794	33%	9.2 d	7.1 d	13M
May 27, 2017	Thunderstorms	155,108	37%	5.2 d	5.4 d	8.9M
Jun 25, 2023	Thunderstorms	120,822	29%	6.1 d	7.0 h	5.7M
Jul 18, 2023	Thunderstorms	138,851	33%	5.8 d	2.0 d	4.9M
Aug 5, 2015	Thunderstorms	38,123	9%	2.1 d	43 h	826k
Jun 2, 2017	No storm report	24,138	6%	2.5 d	3.0 d	767k
May 22, 2020	Thunderstorms	49,224	12%	44 h	41 h	741k
Jun 23, 2018	Thunderstorms	35,223	8%	2.4 d	2.2 h	694k
Dec 10, 2021	Thunderstorms	30,282	7%	2.1 d	2.1 d	677k
Mar 31, 2023	Thunderstorms	37,707	9%	47 h	47 h	625k
Dec 22, 2022	Winter storm	65,626	16%	47 h	6.0 h	620k
Jun 18, 2023	Thunderstorms	36,865	9%	41 h	42 h	601k
Jul 2, 2023	Thunderstorms	34,360	8%	29 h	19 h	524k
Oct 21, 2019	Thunderstorms	35,329	8%	38 h	37 h	506k
Aug 31, 2017	Hurricane Harvey	24,421	6%	30 h	37 h	426k
Apr 29, 2017	No storm report	19,205	5%	42 h	46 h	346k
Jun 15, 2016	Thunderstorms	38,181	9%	22 h	20 h	326k
Jun 18, 2017	Thunderstorms	24,614	6%	26 h	28 h	281k
Sep 12, 2024	Hurricane Francine	24,582	6%	33 h	31 h	273k
Feb 2, 2023	No storm report	21,801	5%	27 h	30 h	267k
Aug 9, 2023	Flooding	23,561	6%	19 h	20 h	238k
Jul 14, 2015	Thunderstorms	27,678	7%	24 h	26 h	236k
Jan 11, 2020	Thunderstorms	26,362	6%	18 h	21 h	231k
Apr 15, 2023	Thunderstorms	20,800	5%	22 h	29 h	197k
Mar 3, 2023	Windstorm	31,058	7%	13 h	14 h	179k
Mar 24, 2023	Thunderstorms	17,447	4%	19 h	25 h	179k
Aug 8, 2025	Flooding	14,771	3%	18 h	18 h	157k
Jun 11, 2023	Thunderstorms	12,718	3%	17 h	19 h	152k
Apr 30, 2016	Windstorm	22,367	5%	12 h	15 h	143k
Jul 15, 2018	Thunderstorms	22,503	5%	12 h	16 h	139k

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.

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Shelby from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

Thunderstorms 49%
Ice storm 37%
No storm on record 7.0%
Winter storm 2.1%
Flooding 1.4%
Tropical storm 1.3%
Windstorm 1.0%
Heat 0.9%

Who keeps the lights on

Utilities serving Shelby

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
City of Memphis	Municipal	349	283	2.23	13.2	385k

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

Shelby (this county) 15 h
Mississippi, AR 8.6 h
Tipton 8.5 h
Fayette 8.3 h
Crittenden, AR 5.8 h
DeSoto, MS 3.0 h
Marshall, MS 0.7 h

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 422,904 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 →