Residents in parts of Gelderland, Netherlands, are experiencing inaccurate rainfall predictions due to interference from a row of poplar trees near the Herwijnen weather radar. The trees are blocking radar pulses, leading to discrepancies between predicted and actual rainfall amounts, particularly during the summer months when foliage is dense. The Dutch meteorological institute (KNMI) identified the trees as the source of the problem, which affects an area stretching from Herwijnen towards Germany, including towns like Arnhem, Nijmegen, and Doetinchem. Initially, the issue was suspected to be caused by wind turbines. The local municipality of West Betuwe, which owns the trees, received a request from the KNMI to prune them late last year but has yet to take action, awaiting a detailed report justifying the intervention. The inaccurate data is particularly concerning during summer, when higher humidity increases the risk of extreme weather events. Buienradar, a popular weather app, is affected by the inaccurate radar data.
