County annual report · FIPS 48421
2023 Sherman County, TX Power Outage Report
In 2023, customers in Sherman County, TX went without power for an average of 23.1 hours, a total of 15K customer-hours (Texas average 8.1 hours). That ranks 58th worst of 252 Texas counties and 328th of 2,977 nationally.
Compared with TX, the US and 2022
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Sherman County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 6, 2023 03:00 | August 6, 2023 19:15 | 16h 15m | 4,450 | 8,161 |
| 2 | June 13, 2023 23:15 | June 14, 2023 05:00 | 5h 45m | 1,278 | 2,253 |
| 3 | June 12, 2023 11:00 | June 12, 2023 13:30 | 2h 30m | 854 | 1,172 |
| 4 | March 30, 2023 16:30 | March 30, 2023 18:45 | 2h 15m | 423 | 847 |
| 5 | August 15, 2023 15:15 | August 15, 2023 19:30 | 4h 15m | 213 | 778 |
| 6 | November 8, 2023 01:45 | November 8, 2023 09:45 | 8h | 63 | 349 |
| 7 | February 26, 2023 23:00 | February 27, 2023 07:15 | 8h 15m | 58 | 184 |
| 8 | February 14, 2023 22:45 | February 15, 2023 01:30 | 2h 45m | 57 | 105 |
| 9 | July 6, 2023 11:45 | July 6, 2023 14:30 | 2h 45m | 56 | 53 |
| 10 | December 9, 2023 16:00 | December 9, 2023 16:15 | 15m | 47 | 12 |
Outage episodes by size in 2023: 5 reached 100+ customers, 2 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 2023, 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 | 2023 | 3.9 hrs | 1.27 | 1.9 hrs | 0.99 |
| 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 n/a of Texas's customers in 2023; 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, 2023, 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/2023/texas/sherman-county