EPISODES OF DEEP CONVECTION IN THE NORTH WEST OF ROMANIA DURING THE SUMMER OF 2015

Abstract

The monitoring of deep convection using radar, allowed the identification of four days, the 25th of May, the 19th, 20th and 24th of July in which the top of the convective clouds reached and overpassed 13 km. The after mass of this convection activity was medium and large size hail, severe wind gusts, frequent lightning and torrential rain. The common feature of these intervals was the presence of warm, unstable air mass. In this environment addition trigger mechanisms occurred such as: synoptic slope of a trough, upper-level troposphere divergence, tropopause folding and upper level cold air advection. Orography plays an important role in triggering convection through the discontinuities that it offers, and its amplification of the convection systems that tend to escalade the mountain slopes.

Keywords

• north-west Romania
• deep convection
• vertical movement