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Eurocode standard recommends using fundamental basic wind velocity (characteristic velocity) as the design value in civil engineering. There are different approaches to estimate this value
depending on the climate features of the given area and the quality of environmental data. The estimation of the characteristic value requires statistical analysis of historical data regarding wind velocities
measured throughout the country at meteorological stations. The results of the analysis are probability
density distributions of this random variable for each meteorological station. On this basis, values of
characteristic wind velocity with a mean return period of 50 years are determined. The zones with
uniform velocities are delineated on the map of the country. In the case of Poland the last evaluation of
wind zones took place over 15 years ago. Higher quality of measurement data on the one hand, and the
introduction of the second generation of Eurocode standards on the other hand, create a need to check
and update these zones. This work presents theoretical basis for the estimation of characteristic values
of random variables in the context of wind velocity, comprehensively reviews practical methods used
for this purpose and summarizes current situation in Poland, finally discusses the issues related to the
heterogeneity of wind data, illustrating them with an example.
