Typical operating window
July–SeptemberPacific winter storms usually deliver the main accumulation between June and August, with strong year-to-year variability.Verified planning context
Snow, weather and avalanche context
Historical patterns help you compare trips. They do not predict your week or replace the operator's daily decisions.
Strongest comparable snow evidence
671 mm SWE median · 554–822 mm interquartile rangeCentral Andes reference ERA5-Land grid cellTier C · modelled estimate · low confidenceSnow character
continentalHigh elevation can preserve cold snow, while intense sun, wind, and dry spells rapidly transform exposed surfaces.Public avalanche information
DMC weather forecasts and warningsNo verified public regional avalanche bulletin was identified. The operator must perform a local assessment.Weather and flight context
A small number of large Pacific storms can dominate the season in the semi-arid Central Andes.
- High-elevation wind
- Storm closure and icing
- Strong solar warming after storms
Meteorological reference area
Santiago and Central Andes catalogue locations
- Includes
- Published Central Andes areas accessed from Santiago.
- Excludes
- Mendoza and Patagonia profiles.
- Elevation
- No verified operator-terrain elevation band is public. Each evidence value retains its site elevation.
Evidence pack
Measurements, claims and gaps stay separate.
Tier CModelled snowfall water equivalent671 mm SWE median · 554–822 mm interquartile range
- Site
- Central Andes reference ERA5-Land grid cell · -33.8000, -70.3000 · 4 km from Central Andes reference reference point
- Period
- Calendar years 1991–2020
- Completeness
- 360 monthly means; all 30 calendar years contain 12 values.
- Method
- ERA5-Land monthly mean daily snowfall accumulation was multiplied by calendar days and 1,000, then summed by calendar year.
- Limitation
- This reference area supports evidence discovery and comparison. It is not an operating-area or tenure boundary. This unadjusted 0.1° reanalysis grid cell is not an observation, snow depth, or terrain-wide total. Grid elevation and wind redistribution can cause substantial local bias.
- ERA5-Land monthly averaged data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-26
Monthly evidence
Each cell keeps its measurement type and unit. Reanalysis water equivalent is not snow depth. Text-only cells preserve a representative data gap.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.7 mm SWE | 0.9 mm SWE | 3.5 mm SWE | 20.9 mm SWE | 57.3 mm SWE | 133 mm SWE | 118.8 mm SWE | 113.1 mm SWE | 72.4 mm SWE | 38.2 mm SWE | 19.2 mm SWE | 4.8 mm SWE |
Commercial operator assessment
Operator assessment process not independently verifiedThe operator must assess current snow, avalanche terrain, weather, aircraft limits, and rescue options. No private operational plan is inferred.
Sources and evidence notes
- WMO Climatological NormalsWorld Meteorological Organization · accessed 2026-08-25
- ERA5-Land hourly data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-25
- Forecasts and meteorological warningsDirección Meteorológica de Chile · accessed 2026-08-25
- Published operator and trip inventoryHeliski International editorial team · accessed 2026-08-25
- ERA5-Land monthly averaged data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-26