County annual report · FIPS 47157
2023 Shelby County, TN Power Outage Report
In 2023, customers in Shelby County, TN went without power for an average of 40.7 hours, a total of 17.2M customer-hours (Tennessee average 11.1 hours). That ranks 1st worst of 83 Tennessee counties and 146th of 2,977 nationally.
Compared with TN, the US and 2022
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Shelby County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 17, 2023 09:00 | August 18, 2023 09:30 | 32d | 138,851 | 5.6M |
| 2 | June 11, 2023 13:45 | July 17, 2023 05:45 | 35d 16h | 120,822 | 7.6M |
| 3 | March 28, 2023 01:45 | April 9, 2023 02:45 | 12d 1h | 37,707 | 836K |
| 4 | February 28, 2023 13:00 | March 9, 2023 09:00 | 8d 20h | 31,058 | 293K |
| 5 | January 28, 2023 14:00 | February 7, 2023 07:30 | 9d 17h | 21,801 | 427K |
| 6 | April 15, 2023 16:45 | April 20, 2023 11:00 | 4d 18h | 20,800 | 252K |
| 7 | March 24, 2023 11:30 | March 28, 2023 00:45 | 3d 13h | 17,447 | 245K |
| 8 | August 18, 2023 13:00 | September 12, 2023 08:15 | 24d 19h | 15,501 | 361K |
| 9 | December 19, 2023 09:15 | December 21, 2023 09:45 | 2d | 14,811 | 15K |
| 10 | December 25, 2023 05:00 | December 26, 2023 10:30 | 1d 5h | 14,395 | 48K |
Outage episodes by size in 2023: 117 reached 100+ customers, 79 reached 1,000+ customers, 13 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Shelby County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Southwest Tennessee E M C | 2023 | 11.7 hrs | 3.98 | 3.9 hrs | 2.67 |
| City of Memphis - (TN) | 2023 | 44.9 hrs | 3.20 | 6.8 hrs | 2.08 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 422,904 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Shelby County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shelby County, TN annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/tennessee/shelby-county