County annual report · FIPS 28063
2019 Jefferson County, MS Power Outage Report
In 2019, customers in Jefferson County, MS went without power for an average of 23.2 hours, a total of 94K customer-hours (Mississippi average 5.8 hours). That ranks 7th worst of 78 Mississippi counties and 180th of 2,945 nationally.
Compared with MS, the US and 2018
Coverage line is EAGLE-I's share of Mississippi customers tracked each year.
Biggest outages in Jefferson County, 2019
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 24, 2019 07:30 | July 8, 2019 02:15 | 13d 18h | 2,143 | 54K |
| 2 | December 29, 2019 20:45 | December 30, 2019 01:15 | 4h 30m | 1,313 | 1,445 |
| 3 | April 16, 2019 04:15 | April 16, 2019 07:15 | 3h | 1,287 | 3,861 |
| 4 | April 18, 2019 18:30 | April 19, 2019 18:30 | 1d | 1,287 | 3,344 |
| 5 | July 13, 2019 14:15 | July 16, 2019 16:15 | 3d 2h | 1,109 | 9,103 |
| 6 | July 10, 2019 16:00 | July 10, 2019 20:15 | 4h 15m | 642 | 499 |
| 7 | June 7, 2019 07:45 | June 7, 2019 15:45 | 8h | 639 | 1,633 |
| 8 | July 11, 2019 08:00 | July 11, 2019 09:15 | 1h 15m | 446 | 558 |
| 9 | June 20, 2019 09:30 | June 20, 2019 21:15 | 11h 45m | 371 | 3,245 |
| 10 | November 23, 2019 07:30 | November 23, 2019 13:15 | 5h 45m | 312 | 1,019 |
Outage episodes by size in 2019: 16 reached 100+ customers, 5 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 2019, 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 | 2018 | 5.3 hrs | 1.81 | 4.2 hrs | 1.64 |
| Southwest Mississippi E P A | 2018 | 25.2 hrs | - | 22.9 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 74% of Mississippi's customers in 2019; 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, 2019, 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/2019/mississippi/jefferson-county