County annual report · FIPS 40045
2018 Ellis County, OK Power Outage Report
In 2018, customers in Ellis County, OK went without power for an average of 36.6 hours, a total of 91K customer-hours (Oklahoma average 2.7 hours). That ranks 3rd worst of 77 Oklahoma counties and 159th of 2,798 nationally.
Compared with OK, the US and 2017
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Ellis 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 25, 2018 04:15 | June 27, 2018 20:45 | 2d 16h | 4,291 | 49K |
| 2 | May 29, 2018 06:45 | May 29, 2018 21:30 | 14h 45m | 2,024 | 12K |
| 3 | February 22, 2018 18:00 | February 22, 2018 19:15 | 1h 15m | 1,996 | 2,495 |
| 4 | March 19, 2018 03:15 | March 19, 2018 04:45 | 1h 30m | 1,993 | 2,199 |
| 5 | June 23, 2018 01:15 | June 23, 2018 22:00 | 20h 45m | 492 | 3,013 |
| 6 | January 31, 2018 10:15 | January 31, 2018 11:15 | 1h | 436 | 436 |
| 7 | April 16, 2018 20:30 | April 16, 2018 22:45 | 2h 15m | 332 | 583 |
| 8 | May 31, 2018 04:00 | June 2, 2018 04:45 | 2d | 315 | 5,098 |
| 9 | July 4, 2018 08:15 | July 11, 2018 14:00 | 7d 5h | 194 | 9,097 |
| 10 | April 29, 2018 12:00 | April 29, 2018 13:00 | 1h | 180 | 180 |
Outage episodes by size in 2018: 16 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 Ellis 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 |
|---|---|---|---|---|---|
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| Northwestern Electric Coop Inc - (OK) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of Oklahoma's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,488 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. Ellis County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ellis County, OK 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/). https://massoutage.com/reports/2018/oklahoma/ellis-county