County annual report · FIPS 48421
2020 Sherman County, TX Power Outage Report
In 2020, customers in Sherman County, TX went without power for an average of 19.0 hours, a total of 12K customer-hours (Texas average 5.3 hours). That ranks 68th worst of 254 Texas counties and 455th of 3,019 nationally.
Compared with TX, the US and 2019
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Sherman County, 2020
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 20, 2020 01:45 | June 20, 2020 08:30 | 6h 45m | 1,310 | 3,429 |
| 2 | June 20, 2020 15:30 | June 20, 2020 18:00 | 2h 30m | 1,165 | 2,913 |
| 3 | July 16, 2020 21:30 | July 17, 2020 03:30 | 6h | 1,127 | 1,163 |
| 4 | January 17, 2020 13:45 | January 17, 2020 15:15 | 1h 30m | 1,115 | 1,673 |
| 5 | November 24, 2020 21:30 | November 25, 2020 00:30 | 3h | 65 | 158 |
| 6 | July 20, 2020 01:45 | July 20, 2020 11:00 | 9h 15m | 64 | 273 |
| 7 | May 12, 2020 00:30 | May 12, 2020 07:30 | 7h | 59 | 235 |
| 8 | April 14, 2020 16:30 | April 14, 2020 19:00 | 2h 30m | 51 | 105 |
| 9 | January 16, 2020 14:45 | January 16, 2020 18:30 | 3h 45m | 47 | 109 |
| 10 | October 29, 2020 02:00 | November 3, 2020 01:15 | 4d 23h | 39 | 1,363 |
Outage episodes by size in 2020: 4 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 Sherman County reported on EIA Form 861 for 2020, 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 | 2020 | 5.5 hrs | 1.25 | 1.7 hrs | 0.92 |
| 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 63% of Texas's customers in 2020; 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, 2020, 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/2020/texas/sherman-county