County annual report · FIPS 47157
2018 Shelby County, TN Power Outage Report
In 2018, customers in Shelby County, TN went without power for an average of 6.1 hours, a total of 2.6M customer-hours (Tennessee average 2.1 hours). That ranks 9th worst of 71 Tennessee counties and 901st of 2,798 nationally.
Compared with TN, the US and 2017
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Shelby County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 18, 2018 10:00 | June 25, 2018 23:45 | 7d 13h | 35,223 | 738K |
| 2 | July 15, 2018 10:15 | July 18, 2018 23:15 | 3d 13h | 22,503 | 176K |
| 3 | July 10, 2018 13:15 | July 15, 2018 03:15 | 4d 14h | 18,700 | 44K |
| 4 | September 6, 2018 10:15 | September 11, 2018 05:45 | 4d 19h | 18,609 | 108K |
| 5 | February 13, 2018 08:45 | February 17, 2018 02:30 | 3d 17h | 14,020 | 45K |
| 6 | May 18, 2018 11:45 | May 22, 2018 06:45 | 3d 19h | 10,914 | 73K |
| 7 | July 5, 2018 12:00 | July 8, 2018 22:15 | 3d 10h | 9,858 | 109K |
| 8 | January 19, 2018 13:15 | January 21, 2018 07:00 | 1d 17h | 9,802 | 21K |
| 9 | June 26, 2018 00:30 | July 4, 2018 20:00 | 8d 19h | 8,923 | 172K |
| 10 | September 23, 2018 05:15 | September 26, 2018 10:45 | 3d 5h | 8,750 | 24K |
Outage episodes by size in 2018: 180 reached 100+ customers, 102 reached 1,000+ customers, 6 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 2018, 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) | 2018 | 5.3 hrs | 1.90 | 3.4 hrs | 1.69 |
| 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 55% of Tennessee's customers in 2018; 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, 2018, 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/2018/tennessee/shelby-county