County annual report · FIPS 28063
2015 Jefferson County, MS Power Outage Report
In 2015, customers in Jefferson County, MS went without power for an average of 14.1 hours, a total of 57K customer-hours (Mississippi average 2.6 hours). That ranks 2nd worst of 70 Mississippi counties and 180th of 2,484 nationally.
Compared with MS, the US
Coverage line is EAGLE-I's share of Mississippi customers tracked each year.
Biggest outages in Jefferson County, 2015
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 7, 2015 11:45 | June 7, 2015 23:00 | 11h 15m | 1,329 | 4,924 |
| 2 | May 18, 2015 02:00 | May 19, 2015 17:00 | 1d 15h | 1,326 | 27K |
| 3 | April 26, 2015 21:00 | April 27, 2015 00:00 | 3h | 1,318 | 3,559 |
| 4 | March 5, 2015 10:45 | March 6, 2015 05:00 | 18h 15m | 1,301 | 18K |
| 5 | March 17, 2015 14:30 | March 17, 2015 16:00 | 1h 30m | 427 | 364 |
| 6 | June 18, 2015 17:15 | June 18, 2015 20:00 | 2h 45m | 324 | 252 |
| 7 | May 21, 2015 20:15 | May 21, 2015 23:00 | 2h 45m | 316 | 706 |
| 8 | May 30, 2015 09:00 | May 30, 2015 14:45 | 5h 45m | 120 | 441 |
| 9 | October 3, 2015 12:45 | October 3, 2015 14:45 | 2h | 119 | 146 |
| 10 | March 5, 2015 04:30 | March 5, 2015 04:45 | 15m | 87 | 22 |
Outage episodes by size in 2015: 9 reached 100+ customers, 4 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 2015, 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 | 2015 | 6.1 hrs | 2.02 | 4.2 hrs | 1.71 |
| Southwest Mississippi E P A | 2015 | 16.7 hrs | - | 14.3 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 2015; 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, 2015, 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/2015/mississippi/jefferson-county