Coryell CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 14, 2021 | 96 hrs | 15,160 (43%) | Winter Storm Uri |
| Mar 5, 2015 | <1 hr | 9,390 (27%) | Unnamed event |
| May 25, 2015 | 4 hrs | 7,140 (20%) | Tornado |
| May 23, 2024 | 22 hrs | 6,717 (19%) | Thunderstorm Wind |
| May 22, 2024 | 3 hrs | 6,716 (19%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Coryell County, Texas that day.
Over the 12 years from 2014 to 2025, Coryell County recorded 324 distinct power outage events, averaging 3.3 hours per event.
The single worst outage on record in Coryell County started February 14, 2021 (Winter Storm Uri), lasting 96 hours and leaving up to 15,160 customers without power (43% of the county) at its peak.
May has historically been the worst month for outages in Coryell County, with 47 events recorded during that month across the dataset.
Based on this history, Coryell County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Coryell County.
| County | Grade | National percentile |
|---|---|---|
| Bastrop County | C | 49th |
| Fort Bend County | C | 49th |
| Hardeman County | C | 50th |
| Fannin County | C | 50th |
| McLennan County | C | 51st |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Coryell County?
Between 2014 and 2025, Coryell County recorded 324 outage events, averaging 3.3 hours each.
What is Coryell County's reliability grade?
Coryell County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Coryell County?
The worst outage on record started February 14, 2021 (Winter Storm Uri), lasting 96 hours and affecting up to 15,160 customers.