林則銘

A Study on Practical Objective Forecast Method of Flying Hazardous Weather

Frontal Thunderstorm ： Part I-

Lin Tse-Ming.

Abstract

　　Frontal thunderstorm in Taiwan mostly occurs in the period from April through June. Though the times of occurrancc arc few, but it occurs rapidly, covers a vast area, and usually brings strong gust, severe turbulence, and icing with it. Therefore it is very dangerous for aircraft flight.

　　Based on the surface observation data taken from 1967 to 1976 (April—June) at Taipei Sungshan, Taoyuan, and Hsinchu, and rawinsonde data taken at Taoyuan, and the surface and upper weather charts in the same period but at the previous days, and by use of the statistical and weather analysis methods, the objective forecast diagrams for each of the above mentioned three surface observation stations are obtained. By use of these diagrams, the probabilities of occurrance and nonoccurrance of frontal thunderstorm can be predicted more accurately and objectively. Thus, the flying safety of both military and civil aircrafts can be also insured.