County annual report · FIPS 48421
2018 Sherman County, TX Power Outage Report
In 2018, customers in Sherman County, TX went without power for an average of 16.0 hours, a total of 10K customer-hours (Texas average 2.4 hours). That ranks 29th worst of 253 Texas counties and 348th of 2,798 nationally.
Compared with TX, the US and 2017
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Sherman 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 | December 27, 2018 08:15 | December 28, 2018 07:30 | 23h 15m | 1,600 | 5,923 |
| 2 | June 22, 2018 12:00 | June 22, 2018 17:00 | 5h | 331 | 174 |
| 3 | October 15, 2018 22:15 | October 15, 2018 23:00 | 45m | 211 | 158 |
| 4 | October 7, 2018 04:45 | October 7, 2018 15:45 | 11h | 199 | 767 |
| 5 | December 4, 2018 23:15 | December 5, 2018 04:00 | 4h 45m | 193 | 305 |
| 6 | July 22, 2018 23:15 | July 23, 2018 00:45 | 1h 30m | 175 | 263 |
| 7 | September 5, 2018 03:15 | September 5, 2018 07:45 | 4h 30m | 175 | 633 |
| 8 | September 1, 2018 14:00 | September 2, 2018 04:30 | 14h 30m | 48 | 268 |
| 9 | April 25, 2018 09:15 | April 25, 2018 15:45 | 6h 30m | 46 | 153 |
| 10 | May 20, 2018 13:00 | May 21, 2018 00:45 | 11h 45m | 45 | 430 |
Outage episodes by size in 2018: 7 reached 100+ customers, 1 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 Sherman 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 |
|---|---|---|---|---|---|
| Southwestern Public Service Co | 2018 | 2.0 hrs | 1.08 | 1.9 hrs | 1.06 |
| Tri-County Electric Coop, Inc (OK) | - | - | - | - | - |
| Rita Blanca Electric Coop, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 90% of Texas's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 643 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. Sherman County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sherman County, TX 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/texas/sherman-county