Local winds related to synoptic scale geostrophic winds in the lower Nervion Valley area.

This report contains an analysis of geostrophic winds compared to local winds in the lower Nervion area. The most frequent geostrophic wind directions were from around west in all seasons, except the summer, which was dominated by weaker north-easterly winds. For westerly winds the local winds were related to the geostrophic wind, for north-easterly geostrophic winds there was no clear relationship to the local wind patterns. The mesoscale and local wind system of the area most often overruled the external geostrophic winds.