Analysis of the 3 June 2008 Henan Severe Convection Event with Ingredients Based Method

By using conventional observation data,obit meteorological satellite cloud pictures,Doppler weather radar and NCEP data the paper adopted forecast method(ingredients method) based on component to analyze severe convective weather of thunderstorm and gale that happened in the afternoon of June 3, 2008 in east central Henan.Combined with sounding,vapor cloud map and Doppler weather radar echo maps that based on the distribution of temperature,moisture and wind on the 500 hPa,700 hPa,850 hPa and surface map in the morning of June 3,2008 the paper analyzed several severe convective weather components of stratification stability,water vapor,lifting triggered,vertical wind shear and tropospheric dry layer.The results show that Henan convective weather area was in the environment of stronger conditional instability,intense deep layer(from surface to 500 hPa) vertical wind shear and obvious high dry stratospheric layer.The environment was in favor of producing and developing highly organized super cell that leading to thunderstorm,strong wind and hail weather.The combined action of surface front,mesoscale convergence line and sub-synoptic scale cold vortex accompanied with positive vorticity advection resulted in rising airflow which made thunderstorm produce first in south central Shanxi.The thunderstorm moved towards southeast from the Taihang Mountain to Henan and developed vigorously in the advantageous environment. Full of using the main thinking of ingredients method the short-time forecasting of the severe convective process can forecast correctly ahead of several hours which is supported by current observation conditions together with the forecaster's experiences.