County annual report · FIPS 29045
2021 Clark County, MO Power Outage Report
In 2021, customers in Clark County, MO went without power for an average of 1.8 hours, a total of 7,074 customer-hours (Missouri average 4.5 hours). That ranks 88th worst of 115 Missouri counties and 2337th of 2,974 nationally.
Compared with MO, the US and 2020
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in Clark 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 | November 15, 2021 22:15 | November 16, 2021 00:45 | 2h 30m | 2,319 | 2,002 |
| 2 | March 8, 2021 20:30 | March 8, 2021 22:15 | 1h 45m | 464 | 697 |
| 3 | March 16, 2021 22:30 | March 16, 2021 23:30 | 1h | 375 | 340 |
| 4 | June 23, 2021 21:45 | June 23, 2021 23:00 | 1h 15m | 252 | 165 |
| 5 | January 20, 2021 19:45 | January 20, 2021 20:30 | 45m | 249 | 173 |
| 6 | December 15, 2021 23:00 | December 16, 2021 08:00 | 9h | 238 | 538 |
| 7 | May 19, 2021 21:30 | May 19, 2021 22:15 | 45m | 160 | 68 |
| 8 | November 11, 2021 14:30 | November 11, 2021 15:45 | 1h 15m | 127 | 159 |
| 9 | March 29, 2021 16:15 | March 29, 2021 16:45 | 30m | 124 | 62 |
| 10 | December 24, 2021 07:45 | December 24, 2021 12:00 | 4h 15m | 124 | 393 |
Outage episodes by size in 2021: 13 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 Clark 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 |
|---|---|---|---|---|---|
| Union Electric Co - (MO) | 2021 | 4.9 hrs | 1.02 | 1.5 hrs | 0.69 |
| Tri-County Electric Coop Assn (MO) | - | - | - | - | - |
| Lewis County Rural E C A | - | - | - | - | - |
| City of Kahoka | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Missouri's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,000 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. Clark County has data for 2015–2017, 2019–2025.
Cite this report
MassOutage (massoutage.com), Clark County, MO 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/missouri/clark-county