Casper, Wyoming Power Outage Today

How reliable is Rocky Mountain Power service in Casper?

Rocky Mountain Power is an investor-owned utility with 147,268 customers. In 2024 its customers averaged 0.86 interruptions and 92 minutes (92 minutes) without power, so the average outage lasted 107 minutes.

Little of that came from major storms (about 0%). Without major event days the average is still 92 minutes, so the figure mostly reflects everyday faults: failed equipment, tree limbs, animals and vehicles hitting poles.

Outages are infrequent, fewer than one per customer a year, and each was fixed in 107 minutes on average.

For comparison, Wyoming as a whole averaged 138 minutes and the United States 614 minutes. That puts Rocky Mountain Power below the state average, which is better.

Among the 5 utilities in Wyoming with at least 5,000 customers that report to the federal government, Rocky Mountain Power ranks 2nd for the fewest outage minutes (1 is best). Nationally, 71% of the 926 utilities of that size reported more outage minutes in 2024.

These are the figures the utility itself reported to the US Energy Information Administration (Form EIA-861, 2024) and describe the whole service territory, not one street. Your own address can be better or worse.

Storm season and outages in Casper

NOAA’s Storm Events Database lists 129 storm reports for Natrona County from 2015 through 2026, most often thunderstorm wind (60), hail (50), flash flood (10), and tornado (5). The busiest full year was 2023 with 23 reports and the quietest was 2021 with 2, so the risk changes a lot from one year to the next.

Reports peak in June (56 since 2015), followed by July and August. October is outside those three months, so an outage now is less likely to be weather-related.

NOAA’s own narratives name power outages in 9 storm episodes in Natrona County since 2015, most often in February. That count is a floor, since the database records outages only when a spotter or agency mentions them.

What the most common storm types in Casper do to the grid:

• Thunderstorm wind. Straight-line wind pushes trees and limbs into distribution lines. These outages are usually local, a street or a neighborhood at a time, and crews clear them circuit by circuit.
• Hail. Hail rarely cuts power by itself, but it often arrives with the wind and lightning that do, and it breaks solar panels, windshields and exposed utility equipment.
• Flash flood. Floodwater reaches ground-level transformers, meters and low-lying substations. Utilities may shut power off ahead of the water on purpose, and wading near flooded equipment can electrocute.

Storm reports that name Casper

Within Natrona County, 40 NOAA storm reports since 2015 name Casper as their location or in their description: thunderstorm wind (20), hail (14), flash flood (3), and tornado (2). That is about 31% of the county’s reports. Reports naming Casper are most common in June. The busiest full year was 2018 with 6.

Who a power outage hits hardest in Casper

75% of occupied homes in Casper are heated with piped natural gas, and 22% with electricity (US 41.3% electric). A gas furnace still needs electricity for its blower and ignition, so a long winter outage leaves these homes cold too, though a gas supply stays on when the grid fails. Never heat a home with an oven, grill or camp stove indoors.

Residents aged 65 or older are 17% of the population in Casper, close to the US share of 17.2% and 16.2% report a disability (US 13.3%). These are the households most likely to depend on powered medical equipment such as oxygen concentrators, CPAP machines and refrigerated medicine. If someone in your home does, ask Rocky Mountain Power whether it keeps a priority or medical-needs list, and register before the next storm rather than during it.

About the housing: 40.9% of the housing in Casper was built before 1970 (US 35.5%).

Source: US Census Bureau, American Community Survey 2020–2024 (housing, heating fuel, age and disability tables).

Backup power and electricity use in Casper

The average Rocky Mountain Power home used about 739 kWh a month in 2024 (US average 892 kWh), an average draw of 1.0 kW around the clock, and paid about 13.4 cents per kWh (12.5 in the state, 15.8 nationally), roughly $99 a month.

Keeping only the essentials on (a refrigerator, router, a few lights and phone chargers, about 400 watts) through an outage that lasts the average 107 minutes takes less than 1 kWh. A portable power station or a power bank covers that; a generator is more than most households here need for a typical outage.

A generator must never run indoors, in a garage or near a window; generator and food-safety rules are in the power outage guide linked below.

If the power is out in Casper

About 59,452 people live in Casper, the 2nd largest of the 4 Wyoming cities on this site. Report the outage to the utility so a ticket exists for your address, then check Rocky Mountain Power’s outage map for an estimate. If neighbors have power and you do not, report it again: the fault may be on the line to your house alone, which is a separate repair.

Casper power outage map

Rocky Mountain Power’s outage map has the official restoration estimate for your address; the count above comes from residents. Food and generator safety: power outage guide.

Casper power outage questions