County annual report · FIPS 28063
2017 Jefferson County, MS Power Outage Report
In 2017, customers in Jefferson County, MS went without power for an average of 11.1 hours, a total of 45K customer-hours (Mississippi average 6.6 hours). That ranks 23rd worst of 77 Mississippi counties and 489th of 2,786 nationally.
Compared with MS, the US and 2016
Coverage line is EAGLE-I's share of Mississippi customers tracked each year.
Biggest outages in Jefferson County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 27, 2017 19:45 | October 28, 2017 19:45 | 1d | 1,337 | 31K |
| 2 | June 11, 2017 20:45 | June 11, 2017 21:00 | 15m | 1,294 | 324 |
| 3 | July 18, 2017 20:00 | July 18, 2017 21:30 | 1h 30m | 1,000 | 337 |
| 4 | May 29, 2017 03:30 | May 29, 2017 20:30 | 17h | 486 | 3,771 |
| 5 | October 22, 2017 03:00 | October 23, 2017 14:30 | 1d 11h | 413 | 3,199 |
| 6 | August 6, 2017 01:30 | August 6, 2017 05:45 | 4h 15m | 398 | 1,156 |
| 7 | August 2, 2017 01:00 | August 2, 2017 07:00 | 6h | 394 | 990 |
| 8 | December 9, 2017 18:00 | December 9, 2017 18:15 | 15m | 223 | 56 |
| 9 | April 22, 2017 22:30 | April 22, 2017 22:45 | 15m | 103 | 26 |
| 10 | July 23, 2017 18:15 | July 24, 2017 02:30 | 8h 15m | 78 | 170 |
Outage episodes by size in 2017: 9 reached 100+ customers, 3 reached 1,000+ customers, 0 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 Jefferson County reported on EIA Form 861 for 2017, 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 |
|---|---|---|---|---|---|
| Entergy Mississippi LLC | 2017 | 10.6 hrs | 2.34 | 3.2 hrs | 1.42 |
| Southwest Mississippi E P A | 2017 | 63.1 hrs | - | 36.1 hrs | - |
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 Mississippi's customers in 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,028 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, MS annual power outage report, 2017, 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/2017/mississippi/jefferson-county