County annual report · FIPS 47157
2020 Shelby County, TN Power Outage Report
In 2020, customers in Shelby County, TN went without power for an average of 7.6 hours, a total of 3.2M customer-hours (Tennessee average 6.5 hours). That ranks 17th worst of 84 Tennessee counties and 1011th of 3,019 nationally.
Compared with TN, the US and 2019
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Shelby County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 22, 2020 07:30 | May 29, 2020 11:15 | 7d 3h | 49,224 | 790K |
| 2 | January 10, 2020 08:15 | January 16, 2020 06:15 | 5d 22h | 26,362 | 294K |
| 3 | June 4, 2020 12:00 | June 12, 2020 07:30 | 7d 19h | 13,880 | 251K |
| 4 | January 31, 2020 09:15 | February 2, 2020 02:45 | 1d 17h | 12,386 | 17K |
| 5 | January 18, 2020 08:15 | January 19, 2020 03:15 | 19h | 12,325 | 31K |
| 6 | April 11, 2020 23:45 | April 15, 2020 05:30 | 3d 5h | 11,943 | 124K |
| 7 | June 29, 2020 07:45 | July 11, 2020 04:45 | 11d 21h | 11,162 | 165K |
| 8 | August 25, 2020 11:30 | August 30, 2020 12:30 | 5d 1h | 10,831 | 243K |
| 9 | October 20, 2020 13:00 | October 21, 2020 06:00 | 17h | 9,174 | 3,329 |
| 10 | December 8, 2020 13:15 | December 10, 2020 12:30 | 1d 23h | 9,026 | 6,843 |
Outage episodes by size in 2020: 216 reached 100+ customers, 122 reached 1,000+ customers, 8 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 2020, 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 |
|---|---|---|---|---|---|
| City of Memphis - (TN) | 2020 | 6.5 hrs | 2.07 | 3.9 hrs | 1.68 |
| Southwest Tennessee E M C | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2020; 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, 2020, 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/2020/tennessee/shelby-county