To avoid hazardous situations, it is important to be able to forecast the condition leading to anomalous propagation of electromagnetic signal. In this study, the operational weather forecasting model Harmonie-AROME used by the Finnish meteorological institute was utilized to assess the effects of model resolution on predicting atmospheric ducting conditions. Four separate model configurations were tested altering the vertical and horizontal resolution. The testing period (from 19th of June to 12th of July, 2022) included several occasions when anomalous propagation had been detected at Northern Baltic sea by the Ut&ouml; coastal surveillance radar. The comparison against the observations show potential of predicting ducting conditions<br />with numerical weather prediction model. At the same time the results reveal the limitations of the model in producing realistic vertical profiles of temperature and humidity especially near surface.