Colorado's practical outage case spans Front Range continuity, foothills fire and wind exposure, and multi-day winter support in colder interior households.
Colorado has no public top-priority BPI counties, so the strongest statewide signal comes from NOAA's wind-and-winter record plus the Front Range medical-device concentration visible in the emPOWER layer.
Mixed Front Range, Wind, and Winter Outage Risk
A winter-only description is understandable in Colorado, but too narrow for the actual outage mix. NOAA's statewide event record is led by winter storms and high wind, with thunderstorm wind, heavy snow, and flash flood close behind, which makes this a Front Range and foothills outage problem rather than only a mountain-cabin scenario.
The public BPI layer does not produce a top-priority Colorado county, so the state has to lean directly on NOAA and HHS emPOWER instead of implying a cross-signal county ranking that is not there. HHS emPOWER counts 120,295 electricity-dependent Medicare beneficiaries statewide, with El Paso (17,223), Jefferson (14,405), Arapahoe (10,908), Denver (8,809), and Adams (8,614) forming the strongest metro continuity cluster.
Colorado's federal declaration record is fire-heavy over the decade, but the most recent non-fire declaration is a better fit for the statewide outage mix. DR-4731 covers severe storms, flooding, and tornadoes in 2023 and better reflects the fact that the practical household case is wind, refrigeration, communications, medical continuity, and heating-system support in longer winter events.
FEMA DR-4731 — severe storms, flooding, and tornadoes in Colorado, June 2023; a stronger match for Colorado's actual mix of Front Range, wind, and winter outages than a fire declaration alone.
Source: FEMA DR-4731Evidence trail
These notes trace the editorial claims above back to FEMA, DOE, utility, or other cited records.
FEMA declaration count (18) from OpenFEMA API, deduplicated by disaster number, DR/EM/FM types, 2014-2023; Colorado's mix in this window includes Fire (14), Flood (2), and Biological (2).
NRI composite score (85.0) from FEMA NRI county layer, population-weighted to state level; top modeled hazards are Lightning, Hail, and Winter Weather.
NOAA outage-relevant event mix is led by Winter Storm (3,812), High Wind (2,863), Thunderstorm Wind (2,520), Heavy Snow (1,411), and Flash Flood (1,073), with Huerfano, El Paso, Garfield, Fremont, and Custer leading county counts.
Colorado has no public top-priority BPI counties in the GeneratorChecker cross-signal layer. HHS emPOWER therefore provides the stronger public county signal, with El Paso (17,223), Jefferson (14,405), Arapahoe (10,908), Denver (8,809), and Adams (8,614) as the largest electricity-dependent Medicare totals.
Colorado Severe Storms, Flooding, and Tornadoes DR-4731 from FEMA disaster declaration records.
Structured FEMA NRI, HHS emPOWER, NOAA Storm Events, and EIA methodology is documented separately on the methodology page.
NRI's top modeled hazards are Lightning, Hail, and Winter Weather, while NOAA's outage-relevant record is led by Winter Storm, High Wind, Thunderstorm Wind, Heavy Snow, and Flash Flood events..
NOAA storm-event records filtered to outage-relevant event types for Colorado. Counts reflect historical storm-event assignments, not confirmed utility outages.
Analysis window
2005-01 to 2024-12
Included storm-event records
13,185
Source as of
2026-03
Included exact NOAA event types for Colorado: Thunderstorm Wind, Tornado, High Wind, Strong Wind, Flash Flood, Flood, Winter Storm, Ice Storm, Freezing Rain, Heavy Snow, Blizzard.
In this filtered NOAA record set for Colorado, Dec has the highest monthly count (1,529 records) , and Winter Storm is the leading event type. This chart shows frequency in NOAA records, not how severe a specific outage may be.
5.3% of listed records were matched directly to this county.
26.4% of listed records were matched directly to this county.
8.3% of listed records were matched directly to this county.
7.2% of listed records were matched directly to this county.
3.2% of listed records were matched directly to this county.
21.6% of listed records were matched directly to this county.
Forecast-zone events in Colorado are assigned to counties using the current NWS county crosswalk. Some forecast zones expand to multiple counties; unresolved legacy, coastal, and sub-county forecast zones fall into the excluded bucket.
Direct county match
35.5%
Mapped from forecast zone
64.5%
Not assigned to county ranking
0.0%
Unresolved forecast zones
0
County-level HHS emPOWER counts for electricity-dependent Medicare beneficiaries in Colorado.
120,295 Medicare beneficiaries in Colorado have claims associated with electricity-dependent medical equipment. (HHS emPOWER, 2026-03)
County-level HHS emPOWER records for this state. Medicare enrollment data only. 64 counties are included in this state snapshot.
Smaller Medicare base; interpret this percentage with extra caution.
Smaller Medicare base; interpret this percentage with extra caution.
Counties with higher concentrations may face elevated community-level demand for backup power during outages. This does not indicate individual medical necessity.
Limitations: Reflects Medicare beneficiaries with claims associated with electricity-dependent medical equipment. Does not capture non-Medicare or uninsured populations. HHS masks cells from 1 to 10 as 11.
Use a 24-hour Front Range continuity model as the baseline, then extend to 48 hours with heating-system support for colder foothills and interior households.
Primary Colorado metro scenario: severe wind, storm, or localized outage across the Front Range while refrigeration, communications, medical support, and work continuity remain the core loads.
Load
698W
Target
24h
Minimum
27,600 Wh
Built for the Front Range household case. This is not a mountain-cabin or resistance-heating scenario.
Size this scenario in calculatorExtended Colorado scenario: colder foothills or interior outage where food preservation, communications, medical support, and a gas-heating blower all need to stay online.
Load
1396W
Target
48h
Minimum
110,100 Wh
This scenario adds heating-system support and does not model electric resistance heating.
Size this scenario in calculatorCritical Note: No single portable power station in our database covers the full 24-hour baseline at this load (27,600 Wh target vs. 6,144 Wh max in our current database). Use solar recharge, load rotation, or expandable systems for longer events.
Writing Colorado as a mountain-cabin winter model when the Front Range holds the largest medical-device load in the state.
Treating the federal fire count as the whole outage picture when NOAA is led by winter storm and high wind events.
Using electric-resistance-heating assumptions instead of blower support when modeling an extended cold-weather scenario.
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Composite score: 85.0 / 100
Rating: Relatively Moderate
Top modeled hazards: Lightning, Hail, Winter Weather
Hurricane score: 0.0
Winter Weather score: 89.1
Wildfire score: 86.8
Total (2014-2023): 18
Most recent: 2023-08-25 Flood
| Type | Count |
|---|---|
| Fire | 14 |
| Biological | 2 |
| Flood | 2 |
Required Wh = (Total Load W × Target Hours / Inverter Derate) × Safety Factor
Inverter derate: 0.70 (30% real-world loss)
Safety factor: 1.15
Rounding: Up to nearest 100 Wh
Colorado has an NRI composite risk score of 85.0 (Relatively Moderate), with 18 federal declarations from 2014 to 2023. NRI's top modeled hazards are Lightning, Hail, and Winter Weather, while NOAA's outage-relevant record is led by Winter Storm, High Wind, Thunderstorm Wind, Heavy Snow, and Flash Flood events..
For the primary scenario on this page (24-hour Front Range continuity), the estimated minimum is 27,600 Wh for a 24-hour target. Refine this in the calculator with your actual devices.
NRI is a modeled risk index based on hazard exposure, vulnerability, and expected loss. FEMA declarations reflect federally declared incidents. They answer different questions — use both signals together for planning.
Sizing only for a short metro outage when the harder planning case in Colorado is a two-day foothills or winter event with heating support. See the common mistakes section above for more state-specific pitfalls.
