春季大风天气特点及预报指标分析

Analysis on Spring Gale Situation Characteristic and Forecast Target

春季(3-5月)是过渡季节,因为冷暖空气交换加剧,偏西大风和偏南大风交替出现。该季节大风的特点是大风次数多、范围广、强度大、持续时间长。一场大风常持续三天,因此有"风三"的说法。西南大风使气温猛升,空气湿度迅速减小,形成高温干燥天气,常常引起城市和森林火灾,给国家和人民生命财产带来巨大损失。因此准确预报大风天气,加强防范,意义重大。通过多年工作积累和对多年天气图普查,现对春季大风天气形势和预报指标进行分析总结。

Spring （from March to May） is the transition season, because the changes in temperature air interchange intensifies, the gale and the southerly gale in the west appear in turn. This season gale characteristic is the gale number of times many, the scope broad, the intensity big, the duration is long. A gale often continues three days, Therefore has ＂ the wind three＂ view. The southwest gale causes the temperature to rise fiercely, the air humidity reduces rapidly, forms the high temperature dry weather, causes the city and the forest - fire frequently, brings the heavy loss for national and the peo- ple life and property. Therefore forecasts the gale weather accurately, Enhancement guard, watershed. Through many year work accumulation and to many year weather map general survey, presently carries on the analysis summary to the spring gale synoptic situation and the forecast target.