Jefferson County Power Outage History
2014–2025 · Indiana
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 15, 2018 | 82 hrs | 8,597 (48%) | Ice Storm |
| Mar 1, 2017 | 38 hrs | 5,228 (29%) | Thunderstorm Wind |
| Jul 1, 2023 | 19 hrs | 4,374 (25%) | Hail |
| Jan 25, 2018 | 2 hrs | 4,159 (23%) | Unnamed event |
| Jun 19, 2021 | 38 hrs | 4,131 (23%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Jefferson County recorded 674 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Jefferson County started November 15, 2018 (Ice Storm), lasting 82 hours and leaving up to 8,597 customers without power (48% of the county) at its peak.
May has historically been the worst month for outages in Jefferson County, with 82 events recorded during that month across the dataset.
Based on this history, Jefferson County earns a Reliability Grade of D, placing it in the 25th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Indiana
Counties with the closest reliability grade and national percentile to Jefferson County.
| County | Grade | National percentile |
|---|---|---|
| Starke County | D | 27th |
| Elkhart County | D | 29th |
| LaPorte County | D | 30th |
| Monroe County | D | 30th |
| Vigo County | F | 20th |
FAQ
How often does power go out in Jefferson County?
Between 2014 and 2025, Jefferson County recorded 674 outage events, averaging 3.8 hours each.
What is Jefferson County's reliability grade?
Jefferson County has a Reliability Grade of D, in the 25th national percentile.
What was the worst power outage in Jefferson County?
The worst outage on record started November 15, 2018 (Ice Storm), lasting 82 hours and affecting up to 8,597 customers.