Power outage history
Shannon County Missouri
17hours
without power for the average customer in a typical year, 2018–2025
4th most of 110 in Missouri 2.5× 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 Shannon'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 2.0 days for the average customer. Hatched years have a thin record and are left out of the averages.
Shannon, 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 |
|---|---|---|---|---|---|---|
| Jan 24, 2023 | Winter storm | 3,195 | 100% | 3.7 d | 2.7 d | 132k |
| May 26, 2024 | Tornadoes | 1,127 | 35% | 38 h | 18 h | 20k |
| Mar 19, 2025 | Wildfire | 845 | 26% | 25 h | 21 h | 12k |
| May 8, 2024 | Thunderstorms | 1,001 | 31% | 2.8 d | 15 h | 12k |
| Oct 26, 2019 | Tropical Storm Olga | 717 | 22% | 19 h | 11 h | 11k |
| Jan 5, 2025 | Winter storm | 633 | 20% | 3.2 d | 34 h | 10k |
| Oct 21, 2019 | Thunderstorms | 1,139 | 36% | 31 h | 16 h | 9.4k |
| Apr 4, 2025 | Flooding | 338 | 11% | 41 h | 26 h | 8.3k |
| May 4, 2020 | Thunderstorms | 1,907 | 60% | 4.2 h | 2.2 h | 6.7k |
| Nov 4, 2024 | Thunderstorms | 360 | 11% | 2.7 d | 33 h | 5.1k |
| May 19, 2025 | No storm report | 360 | 11% | 42 h | 42 h | 4.4k |
| Apr 28, 2020 | Thunderstorms | 468 | 15% | 15 h | 14 h | 3.8k |
| Mar 13, 2024 | No storm report | 755 | 24% | 4.0 h | 4.0 h | 3.0k |
| May 11, 2017 | Thunderstorms | 405 | 13% | 7.2 h | 8.5 h | 2.9k |
| Mar 5, 2025 | No storm report | 530 | 17% | 11 h | 3.0 h | 2.6k |
| Sep 14, 2025 | No storm report | 696 | 22% | 5.0 h | 3.5 h | 2.5k |
| May 6, 2020 | No storm report | 171 | 5% | 18 h | 5.0 h | 2.4k |
| Oct 2, 2019 | No storm report | 425 | 13% | 5.8 h | 5.5 h | 2.4k |
| Jul 4, 2023 | No storm report | 580 | 18% | 4.8 h | 4.2 h | 2.3k |
| May 3, 2020 | Thunderstorms | 936 | 29% | 3.5 h | 1.8 h | 2.3k |
| Mar 14, 2020 | No storm report | 544 | 17% | 3.8 h | 3.8 h | 2.0k |
| May 19, 2022 | No storm report | 177 | 6% | 18 h | 15 h | 2.0k |
| Apr 15, 2023 | No storm report | 699 | 22% | 7.5 h | 6.0 h | 2.0k |
| Jan 3, 2020 | No storm report | 1,750 | 55% | 2.0 h | 2.0 h | 2.0k |
| Oct 8, 2025 | No storm report | 412 | 13% | 4.2 h | 4.2 h | 1.8k |
| May 31, 2024 | Flooding | 194 | 6% | 11 h | 8.2 h | 1.7k |
| May 15, 2022 | No storm report | 444 | 14% | 3.8 h | 3.2 h | 1.6k |
| Apr 2, 2025 | Thunderstorms | 411 | 13% | 3.8 h | 12 h | 1.5k |
| Jul 5, 2024 | Thunderstorms | 180 | 6% | 19 h | 16 h | 1.5k |
| Jul 31, 2020 | Thunderstorms | 165 | 5% | 23 h | 17 h | 1.4k |
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 Shannon from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 41%
- No storm on record 28%
- Thunderstorms 14%
- Tornadoes 5.8%
- Flooding 4.0%
- Tropical storm 3.6%
- Wildfire 3.5%
Who keeps the lights on
Utilities serving Shannon
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 |
|---|---|---|---|---|---|---|
| Ozark Border Electric Coop | Cooperative | – | – | – | 12.3 | 33k |
| Intercounty Electric Coop Assn | Cooperative | 707 | 251 | 3.10 | 13.0 | 30k |
| Howell-Oregon Elec Coop, Inc | Cooperative | – | – | – | 13.1 | 23k |
| Black River Electric Coop | Cooperative | 2,909 | 564 | – | 13.6 | 22k |
| City of Winona | MO | – | – | – | – | 6.2k |
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.
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 3,195 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 →