A new wind model is proposed in this paper to analyze nonstationary wind data collected during strong winds.In the new model

the longitudinal wind speed is modeled as a deterministic time-varying mean wind speed plus a zero-mean stationary random process for longitudinal turbulent wind components.Formula for determining wind parameters is modified accordingly.The time-varying mean wind speed can be directly extracted from the original records by the empirical mode decomposition method.Using filed measured wind records of 1851-hour long

comparisons are made between the wind parameters obtained from two models including hourly mean wind speed

turbulence intensity

wind spectrum and integral length scale

root coherence function and probability density function.The results demonstrate that the nonstationary wind model appears to be more appropriate than the conventional stationary wind speed model for characterizing turbulent winds of one-hour duration.