Typical operating window
February–JuneWinter storms build the base; spring combines retained mountain snow with long daylight and ski-to-sea access.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
781 mm SWE median · 630–841 mm interquartile rangeTroll Peninsula catalogue location ERA5-Land grid cellTier C · modelled estimate · low confidenceSnow character
maritimeWind effect is common. Sheltered cold snow alternates with sun-softened corn and refrozen crusts in spring.Public avalanche information
Icelandic Meteorological Office Northern Tröllaskagi forecastConfirm the displayed region, elevation, issue time, and validity before using the public forecast as context.Weather and flight context
North Atlantic systems can change wind, cloud, precipitation, and snowline within hours.
- Sea fog and low cloud
- Ridge wind
- Flat light and fast frontal passage
Meteorological reference area
Troll Peninsula
- Includes
- Troll Peninsula and its applicable Icelandic forecast region.
- Excludes
- Other Iceland heli-ski regions in destination 7.
- 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 equivalent781 mm SWE median · 630–841 mm interquartile range
- Site
- Troll Peninsula catalogue location ERA5-Land grid cell · 66.1000, -18.9000 · 5.4 km from Troll Peninsula catalogue location 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 101.9 mm SWE | 85.3 mm SWE | 101 mm SWE | 72.7 mm SWE | 37.4 mm SWE | 3.1 mm SWE | 0.5 mm SWE | 0.2 mm SWE | 16.1 mm SWE | 79.4 mm SWE | 106.2 mm SWE | 106 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
- Regional avalanche forecastIcelandic Meteorological Office · 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
- Heli-skiing programs in IcelandArctic Heli Skiing · accessed 2026-08-25