County annual report · FIPS 51077
2021 Grayson County, VA Power Outage Report
In 2021, customers in Grayson County, VA went without power for an average of 19.4 hours, a total of 158K customer-hours (Virginia average 8.7 hours). That ranks 30th worst of 130 Virginia counties and 446th of 2,974 nationally.
Compared with VA, the US and 2020
Coverage line is EAGLE-I's share of Virginia customers tracked each year.
Biggest outages in Grayson County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 26, 2021 10:00 | October 28, 2021 16:45 | 2d 6h | 5,686 | 55K |
| 2 | January 28, 2021 02:45 | January 30, 2021 02:15 | 1d 23h | 1,920 | 39K |
| 3 | February 18, 2021 09:00 | February 19, 2021 21:00 | 1d 12h | 1,462 | 7,689 |
| 4 | May 26, 2021 13:30 | May 26, 2021 17:00 | 3h 30m | 1,436 | 1,511 |
| 5 | August 2, 2021 20:00 | August 3, 2021 00:30 | 4h 30m | 1,427 | 3,203 |
| 6 | May 30, 2021 02:15 | May 30, 2021 04:30 | 2h 15m | 1,356 | 3,051 |
| 7 | January 27, 2021 14:15 | January 27, 2021 18:45 | 4h 30m | 1,116 | 1,987 |
| 8 | August 18, 2021 00:00 | August 19, 2021 21:30 | 1d 21h | 644 | 7,454 |
| 9 | October 8, 2021 12:15 | October 8, 2021 18:00 | 5h 45m | 540 | 959 |
| 10 | October 28, 2021 17:45 | October 28, 2021 20:30 | 2h 45m | 539 | 1,266 |
Outage episodes by size in 2021: 37 reached 100+ customers, 7 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 Grayson County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Appalachian Power Co | 2021 | 22.1 hrs | 2.24 | 7.7 hrs | 1.84 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 97% of Virginia's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,137 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. Grayson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grayson County, VA annual power outage report, 2021, 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/2021/virginia/grayson-county