Application of Boundary Wind Profile Radar to Severe Convective Weather Forecast in Central Zhejiang
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Abstract:
Fifteen severe convective weather cases are analyzed based on Yiwu CFL-03 boundary layer wind profile radar data. The results are as follows: (1) From horizontal wind data the information about cold air mass invasion can be obtained prior to weather synoptic maps. It is helpful to predict severe convective weather and low-level southwest jet, especially ultra low-level southwest jet or southerly jet, which is helpful for short-term rainstorms or hails. The ultra low-level jet is also an indicator of thunderstorm gales. (2) Vertical wind and CN2 are good indicators to reflect the beginning and termination of a rainfall process. For rain events, radial velocity is positive, spectral width broadens in power spectral density diagrams, and the shapes of all signals are similar. (3) Velocity ambiguity in radial velocity maps denotes severe weather processes. Strong wind is happening if velocity ambiguity is at a low level. The wind profiler radar is a reliable instrument to predict the occurrence and development of severe convective weather. The local short-term and nowcasting capability can be effectively strengthened with the Doppler radar data.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.