Weather
Six weather models as ensemble, 1,500+ mountain stations and custom calculations for summit wind, snow and freezing level. All model data is served from our own Open-Meteo instance — independent of third-party APIs.
Weather Stations
Real-time measurements from over 1,500 mountain stations (above 800 m) across 11 data sources covering the entire Alps.
Weather Models
Click a model for details and methodology.
ICON EU & ICON D2
DWD regional models – 6.5 km and 2.2 km resolution for Central Europe.
ECMWF IFS
Leading global model with unique precipitation type (freezing rain, wet snow).
AROME
High-resolution (1.3 km) from Meteo-France – strong in the Western Alps.
GFS
US global model with the longest forecast range (16 days).
AIFS
AI-based ECMWF model – experimental, strong for large-scale weather patterns.
Calculations
Click a calculation for details and methodology.
Ensemble Calculation
Weighted combination, wind vector averaging, WMO voting and downgrade rules.
Summit Wind
Upper-level wind selection by pressure level, blending zones and exposure correction.
Snow Fallback
Kuchera ratio, wind modifier and freezing level damping for missing snowfall values.
Cloud Base & Freezing Level
Hennig formula for cloud base, inversion guard and freezing level.
Thunderstorm Risk Score
Automatic assessment of thunderstorm danger from CAPE, CIN, Lifted Index and convective clouds.
Snow Level
snowfall_height (wet-bulb) for ICON and pressure-level interpolation for other models.
Cloud Layers
Cloud cover split into low, mid and high layers with model-specific aggregation.