Forecast Accuracy Benchmark

Period: 2026-08-29 to 2026-09-28 (30 days)

Model N Wind Speed (m/s) Wind Dir Temperature (°C)
MAEBiasRMSE MAEBias MAEBias
HARMONIE 5 km (EU)427881.24-0.381.6632.5°-19.6°0.83+0.09
MET Nordic 1 km (Scandinavia)417381.26+0.111.6923.6°+4.0°0.76+0.12
HARM-FI 2.5 km (Scandinavia)482051.27+0.161.723.7°+4.1°0.78-0.06
HARMONIE-AROME 2.5km891981.3+0.121.7624.2°+3.3°0.81-0.08
ICON 7 km (Europe)568431.37-0.401.8425.7°+5.8°0.85-0.10
HARM-DK 2 km (NW Europe)438861.38-0.471.8424.1°+5.1°0.89+0.15
ICON 13 km (World)806031.45-0.071.9231.8°+3.7°1.36+0.00
Zephr-HD 2.6 km (Europe)463151.52+0.261.9833.1°+3.6°1.02+0.17
IFS-HRES 9 km (World)1038511.73+0.462.2839.3°+5.7°1.6-0.03
GDPS 15 km (World)493131.78+0.682.337.8°+5.8°1.13+0.10
GFS 13 km (World)1253811.98+0.782.6148.8°+2.1°1.61-0.64
EMHI forecast9602.23+1.202.5727.8°+1.2°1.23-0.16

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 2026-09-28 09:00 UTC