Forecast Accuracy Benchmark

Period: 2026-05-23 to 2026-06-22 (30 days)

Model N Wind Speed (m/s) Wind Dir Temperature (°C)
MAEBiasRMSE MAEBias MAEBias
HARM-FI 2.5 km (Scandinavia)478031.24-0.111.7228.9°+4.5°1.02+0.07
MET Nordic 1 km (Scandinavia)424461.25-0.141.7329.3°+4.1°1.03+0.38
HARMONIE-AROME 2.5km891361.26-0.131.7629.8°+4.0°1.05+0.05
HARMONIE 5 km (EU)438861.33-0.721.8837.3°-21.4°1.1-0.31
ICON 7 km (Europe)568431.33-0.691.9232.4°+5.6°1.14-0.24
HARM-DK 2 km (NW Europe)438861.41-0.762.0229.4°+2.1°1.16-0.13
ICON 13 km (World)806031.44-0.572.0440.6°+4.0°1.91-0.28
Zephr-HD 2.6 km (Europe)552531.55-0.232.1438.2°+2.9°1.59-0.52
IFS-HRES 9 km (World)1033171.62-0.042.2143.8°+6.0°2.27-0.38
GDPS 15 km (World)346971.77+0.172.3644.5°+6.2°1.65-0.28
GFS 13 km (World)1269181.88+0.202.5554.9°+8.2°2.43-1.44
EMHI forecast9602.2+1.052.6336.5°+8.1°2.07-0.72

MAE = Mean Absolute Error. Bias = mean(forecast − obs), positive = model overestimates. RMSE = Root Mean Square Error. Wind direction bias normalized to ±180°. Forecasts matched to nearest observation within ±30 minutes. Sorted by wind speed MAE (best model first).

Generated 2026-06-22 09:00 UTC