Blowing snow is a typical natural hazard in high-altitude and snow-prone regions, and its impact could be significantly reduced by accurate forecasts. The empirical study on the conditions for blowing snow hazards on the Sichuan–Xizang Highway in high-altitude mountainous areas are conducted in this paper. The study reveals that blowing snow events primarily occur from December to the following February, with the affected roads mainly located in mountainous areas above altitudes of 3000 m. Based on physical characteristics, snow cover is categorized into three types with different processes of snowdrifts: newly fallen or wind-transported snow, slightly consolidated snow, and compacted snow undergoing freeze–thaw cycles, each exhibiting distinct snowdrift formation processes. Field measurement results indicate that the average threshold wind speeds for initiating blowing snow are 9.65, 14.77, and 23.15 m s⁻¹ at the 10-m height for these three snow types, respectively. Additionally, analyzing the effects of temperature and snowfall timing on threshold wind velocity, a multi-tiered susceptibility model for blowing snow is developed. This model offers enhanced practical applicability for classifying different types of snow and provides more detailed insights into the variations in threshold wind speed during both the early and later stages of snowfall events, compared to models that rely solely on constant thresholds or temperature-based criteria.

The cable supported photovoltaic array is prone to large-scale wind-induced vibration under strong wind weather, which affects the safety and use of the structure. At present, the characteristics of wind-induced vibration are not clear enough. Wind speed, wind direction angle and inclination angle on the displacement and cable-end force response of a single-layer cable supported photovoltaic array were analyzed by wind tunnel test of a full aeroelastic model. The results show that the vertical vibration, torsional vibration and cable-end force all increase with the increase of the wind speed. The maximum mean and fluctuation values of the vertical displacement and the torsional displacement appear at different locations. The mean value of the vertical displacement is larger in the first row of the windward while the fluctuation value is the largest in the second row of windward. The mean and fluctuation values of the torsional displacement are the largest in the second and last rows. The wind-induced vibration of the cable supported photovoltaic array at 180° wind direction angle is more severe than that at 0° wind direction angle. When the wind direction angle is 0°, the tension of the windward cable is tighter than that of the leeward cable, and the variation range of the cable-end force is larger. When the wind direction angle is 180°, the vibration of the leeward cable is more severe, and the force response of the first row of the windward cable is larger. The cable-end force response of the windward cable and the leeward cable is significantly different under large inclination angles. When the inclination angle is 22.5°, the amplification coefficient is the largest in the first row of the windward cable, which is 1.30 at 0° wind direction angle and 1.22 at 180° wind direction angle. The vibrations of the vertical and torsional displacements have a strong correlation with the cable-end force. This paper provides a reference for the structural wind-resistant design and optimization of cable supported photovoltaic array.