A study of the relation between the surface wind at Trawsfynydd Power Station and nearby topography

Trawsfynydd Power Station (52.9N, 04.0W) lies in a hilly region in northwest Wales. Certain local effects on the surface wind at the power station are revealed by comparing the surface wind there with the surface wind at Valley (53.3N, 04.5W), a well-exposed coastal site only about 50 km to the northwest. Tentative explanations are given for the occurrence of the observed local effects in terms of nearby topography.