Power outage history
Clark County Missouri
5.0hours
without power for the average customer in a typical year, 2018–2025
53rd most of 110 in Missouri 24% below the national median
Every day since 2015
Eleven years, one night at a time
Each cell is a day. The brighter it is, the larger the share of Clark's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2023 was the worst well-recorded year, at 15 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Clark, hours without power per customer
The record
The biggest outages since 2015
Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.
| Began | Storm | Peak out | Share | Lasted | 90% restored | Customer-hours |
|---|---|---|---|---|---|---|
| Jun 29, 2023 | Thunderstorms | 2,619 | 65% | 35 h | 27 h | 50k |
| Jan 9, 2024 | Winter storm | 1,024 | 26% | 28 h | 23 h | 12k |
| May 27, 2024 | Thunderstorms | 1,159 | 29% | 7.2 h | 30 min | 4.1k |
| Aug 5, 2023 | Flooding | 397 | 10% | 15 h | 10 h | 3.1k |
| Oct 30, 2024 | No storm report | 665 | 17% | 8.2 h | 3.5 h | 2.7k |
| Apr 7, 2024 | No storm report | 885 | 22% | 3.0 h | 3.0 h | 2.7k |
| Mar 19, 2024 | No storm report | 437 | 11% | 4.8 h | 4.8 h | 2.1k |
| Nov 15, 2021 | No storm report | 2,319 | 58% | 1.8 h | 12 min | 2.0k |
| Jul 1, 2023 | No storm report | 389 | 10% | 3.8 h | 3.8 h | 1.4k |
| Mar 14, 2024 | Thunderstorms | 384 | 10% | 4.0 h | 6.0 h | 1.3k |
| Mar 21, 2025 | No storm report | 1,330 | 33% | 1.8 h | 1.0 h | 1.3k |
| Jun 1, 2024 | No storm report | 443 | 11% | 2.8 h | 2.2 h | 1.2k |
| May 23, 2022 | No storm report | 458 | 11% | 2.5 h | 8.0 h | 1.1k |
| Nov 7, 2020 | No storm report | 465 | 12% | 2.5 h | 30 min | 1.1k |
| Mar 8, 2021 | No storm report | 464 | 12% | 1.5 h | 1.5 h | 696 |
| Oct 15, 2025 | No storm report | 380 | 10% | 1.8 h | 2.2 h | 664 |
| Oct 10, 2022 | No storm report | 596 | 15% | 2.0 h | 1.8 h | 654 |
| Jul 25, 2020 | No storm report | 198 | 5% | 3.2 h | – | 614 |
| Jul 9, 2020 | No storm report | 191 | 5% | 3.5 h | – | 587 |
| Jul 21, 2020 | No storm report | 469 | 12% | 1.2 h | 1.2 h | 586 |
| Aug 25, 2025 | No storm report | 381 | 10% | 1.5 h | 1.5 h | 572 |
| Sep 3, 2023 | No storm report | 434 | 11% | 2.0 h | 30 min | 535 |
| Dec 15, 2021 | No storm report | 238 | 6% | 4.5 h | 3.0 h | 531 |
| Sep 10, 2023 | No storm report | 128 | 3% | 4.0 h | – | 512 |
| Sep 11, 2024 | No storm report | 296 | 7% | 2.0 h | – | 508 |
| Oct 5, 2025 | No storm report | 482 | 12% | 1.0 h | 2.0 h | 482 |
| Jun 9, 2020 | Tropical Storm Cristobal | 88 | 2% | 5.2 h | – | 458 |
| Mar 14, 2025 | Thunderstorms | 129 | 3% | 4.5 h | – | 442 |
| Apr 14, 2023 | No storm report | 104 | 3% | 4.0 h | – | 415 |
| Aug 21, 2024 | No storm report | 252 | 6% | 1.8 h | 1.2 h | 397 |
After the peak
How fast the lights come back
Each line is one major outage, from its peak. The amber line is the typical path.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Clark from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 51%
- No storm on record 35%
- Winter storm 11%
- Flooding 2.8%
Who keeps the lights on
Utilities serving Clark
As each utility reports to the Energy Information Administration for its whole Missouri territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Union Electric Co | Investor Owned | 594 | 119 | 1.18 | 13.3 | 1.1M |
| Lewis County Rural E C A | MO | – | – | – | 13.8 | 83k |
| Tri-County Electric Coop Assn (MO) | MO | 63 | 51 | 1.61 | 13.4 | 73k |
| City of Kahoka | MO | – | – | – | – | 14k |
EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.
Next door
Neighbouring counties
- Scotland 5.6 h
- Hancock, IL 5.3 h
- Van Buren, IA 5.2 h
- Clark (this county) 5.0 h
- Lee, IA 4.4 h
- Knox 4.0 h
- Lewis 1.8 h
About these numbers
Notes
Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 4,000 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →