County annual report · FIPS 51770
2021 Roanoke city, VA Power Outage Report
In 2021, customers in Roanoke city, VA went without power for an average of 3.7 hours, a total of 261K customer-hours (Virginia average 8.7 hours). That ranks 96th worst of 130 Virginia counties and 1631st 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 Roanoke city, 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 | September 18, 2021 01:15 | September 18, 2021 04:00 | 2h 45m | 2,297 | 5,617 |
| 2 | May 2, 2021 18:45 | May 6, 2021 23:00 | 4d 4h | 1,791 | 22K |
| 3 | June 3, 2021 22:00 | June 4, 2021 03:30 | 5h 30m | 1,577 | 6,492 |
| 4 | December 8, 2021 13:45 | December 9, 2021 04:00 | 14h 15m | 1,422 | 593 |
| 5 | January 5, 2021 02:30 | January 5, 2021 04:15 | 1h 45m | 1,375 | 387 |
| 6 | August 1, 2021 04:30 | August 1, 2021 19:15 | 14h 45m | 1,234 | 3,458 |
| 7 | June 13, 2021 07:00 | June 15, 2021 23:30 | 2d 16h | 1,147 | 21K |
| 8 | October 3, 2021 12:30 | October 3, 2021 21:30 | 9h | 1,137 | 2,776 |
| 9 | October 13, 2021 00:15 | October 13, 2021 10:45 | 10h 30m | 1,118 | 410 |
| 10 | June 6, 2021 15:00 | June 6, 2021 20:30 | 5h 30m | 1,106 | 1,103 |
Outage episodes by size in 2021: 102 reached 100+ customers, 11 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 Roanoke city 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 ÷ 71,375 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. Roanoke city has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Roanoke city, 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/roanoke-city