County annual report · FIPS 40051
2018 Grady County, OK Power Outage Report
In 2018, customers in Grady County, OK went without power for an average of 4.5 hours, a total of 113K customer-hours (Oklahoma average 2.7 hours). That ranks 32nd worst of 77 Oklahoma counties and 1130th 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 Grady 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 | May 15, 2018 15:00 | May 16, 2018 03:30 | 12h 30m | 3,780 | 5,004 |
| 2 | September 21, 2018 12:15 | September 21, 2018 14:45 | 2h 30m | 3,133 | 1,581 |
| 3 | July 30, 2018 08:00 | July 31, 2018 05:30 | 21h 30m | 3,092 | 2,581 |
| 4 | February 16, 2018 07:15 | February 16, 2018 20:15 | 13h | 3,088 | 3,730 |
| 5 | May 3, 2018 01:00 | May 4, 2018 20:15 | 1d 19h | 3,075 | 5,298 |
| 6 | September 18, 2018 08:00 | September 18, 2018 09:00 | 1h | 3,020 | 2,268 |
| 7 | June 23, 2018 04:15 | June 24, 2018 02:00 | 21h 45m | 2,678 | 6,544 |
| 8 | July 12, 2018 00:15 | July 12, 2018 07:45 | 7h 30m | 2,654 | 12K |
| 9 | December 26, 2018 16:15 | December 28, 2018 04:00 | 1d 11h | 2,529 | 8,671 |
| 10 | April 30, 2018 11:45 | April 30, 2018 13:30 | 1h 45m | 1,902 | 3,329 |
Outage episodes by size in 2018: 77 reached 100+ customers, 20 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 Grady 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 |
|---|---|---|---|---|---|
| Public Service Co of Oklahoma | 2018 | 2.1 hrs | 1.34 | 1.7 hrs | 1.17 |
| Cotton Electric Coop, Inc | 2018 | 3.6 hrs | 1.91 | 3.3 hrs | 1.84 |
| Oklahoma Electric Coop Inc | 2018 | 1.5 hrs | 1.63 | 1.5 hrs | 1.63 |
| Rural Electric Coop, Inc - (OK) | 2018 | 6.8 hrs | 3.42 | 3.9 hrs | 2.49 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| CKenergy Electric Cooperative | - | - | - | - | - |
| City of Marlow - (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 ÷ 24,938 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. Grady County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grady 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2018/oklahoma/grady-county