County annual report · FIPS 28159
2021 Winston County, MS Power Outage Report
In 2021, customers in Winston County, MS went without power for an average of 28.4 hours, a total of 375K customer-hours (Mississippi average 17.2 hours). That ranks 23rd worst of 78 Mississippi counties and 309th of 2,974 nationally.
Compared with MS, the US and 2020
Coverage line is EAGLE-I's share of Mississippi customers tracked each year.
Biggest outages in Winston County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 18, 2021 01:15 | February 23, 2021 00:30 | 4d 23h | 10,567 | 351K |
| 2 | August 30, 2021 16:30 | August 31, 2021 00:30 | 8h | 3,659 | 8,062 |
| 3 | March 25, 2021 18:30 | March 25, 2021 23:45 | 5h 15m | 1,824 | 2,288 |
| 4 | May 13, 2021 19:45 | May 13, 2021 20:45 | 1h | 1,306 | 1,087 |
| 5 | June 19, 2021 19:15 | June 20, 2021 07:30 | 12h 15m | 987 | 1,924 |
| 6 | January 1, 2021 12:15 | January 1, 2021 12:45 | 30m | 768 | 320 |
| 7 | May 4, 2021 19:45 | May 5, 2021 03:30 | 7h 45m | 761 | 1,685 |
| 8 | May 13, 2021 04:45 | May 13, 2021 05:30 | 45m | 508 | 381 |
| 9 | January 11, 2021 14:00 | January 11, 2021 18:00 | 4h | 470 | 440 |
| 10 | May 25, 2021 12:15 | May 25, 2021 13:00 | 45m | 366 | 275 |
Outage episodes by size in 2021: 20 reached 100+ customers, 4 reached 1,000+ customers, 1 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 Winston County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| East Mississippi Elec Pwr Assn | 2021 | 58 min | 3.40 | 3 min | 1.53 |
| Louisville Electric System | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 77% of Mississippi's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,238 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. Winston County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Winston County, MS annual power outage report, 2021, 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/2021/mississippi/winston-county