Forecast Accuracy Benchmark

Period: 2026-07-25 to 2026-08-24 (30 days)

Model N Wind Speed (m/s) Wind Dir Temperature (°C)
MAEBiasRMSE MAEBias MAEBias
HARM-FI 2.5 km (Scandinavia)475001.29-0.061.7523.5°+7.1°0.96+0.31
MET Nordic 1 km (Scandinavia)419741.29-0.081.7323.7°+6.8°0.95+0.46
HARMONIE 5 km (EU)433971.3-0.571.7729.5°-17.7°0.92+0.31
HARMONIE-AROME 2.5km889491.31-0.091.7724°+6.5°0.98+0.29
ICON 7 km (Europe)561921.4-0.481.9124.8°+8.8°0.9+0.04
HARM-DK 2 km (NW Europe)433971.42-0.621.9224.1°+7.7°1.05+0.46
ICON 13 km (World)797491.46-0.322.0130.6°+7.6°1.65+0.13
Zephr-HD 2.6 km (Europe)502311.63+0.002.1735°+11.0°1.22+0.27
IFS-HRES 9 km (World)1028321.69+0.042.2638.7°+9.3°1.82-0.01
GDPS 15 km (World)491621.72+0.232.2636.6°+13.4°1.22+0.14
GFS 13 km (World)1268581.89+0.302.548.8°+11.2°1.7-0.44
EMHI forecast9602.31+1.202.6935.5°+4.0°1.48-0.01

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 2026-08-24 09:00 UTC