County annual report · FIPS 48421
2025 Sherman County, TX Power Outage Report
In 2025, customers in Sherman County, TX went without power for an average of 13.8 hours, a total of 8,893 customer-hours (Texas average 4.6 hours). That ranks 83rd worst of 254 Texas counties and 555th of 3,000 nationally.
Compared with TX, the US and 2024
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Sherman County, 2025
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 9, 2025 03:45 | August 9, 2025 08:45 | 5h | 1,251 | 5,894 |
| 2 | January 24, 2025 23:45 | January 25, 2025 01:15 | 1h 30m | 306 | 368 |
| 3 | March 4, 2025 17:45 | March 5, 2025 00:15 | 6h 30m | 86 | 394 |
| 4 | June 9, 2025 00:00 | June 9, 2025 06:45 | 6h 45m | 62 | 419 |
| 5 | May 22, 2025 00:45 | May 22, 2025 04:15 | 3h 30m | 57 | 115 |
| 6 | August 3, 2025 07:45 | August 3, 2025 19:15 | 11h 30m | 51 | 587 |
| 7 | March 2, 2025 21:00 | March 3, 2025 01:15 | 4h 15m | 48 | 204 |
| 8 | March 28, 2025 20:45 | March 28, 2025 21:15 | 30m | 48 | 24 |
| 9 | March 29, 2025 23:15 | March 29, 2025 23:45 | 30m | 48 | 24 |
| 10 | October 20, 2025 14:15 | October 20, 2025 14:45 | 30m | 26 | 13 |
Outage episodes by size in 2025: 2 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 2025, 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 | 2024 | 2.9 hrs | 1.21 | 2.1 hrs | 1.14 |
| 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 2025; 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, 2025, 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/2025/texas/sherman-county