We study ionospheric effects observed in periods of increased meteorological activity in the troposphere and compare the results obtained in two different regions – in the Czech Republic, Central Europe and in Western Cape, Republic of South Africa. In both regions, similar sounding technique was used. Continuous Doppler frequency shift measurements provide data on wave activity in the ionosphere down to periods of the order of tens of seconds. Information about the stratification of the ionosphere, critical frequencies, and reflection height of the Doppler system sounding wave are obtained from measurements of Digisondes located near both Doppler sounding systems. We selected days with passages of weather fronts over the regions as weather fronts are known as an efficient source of atmospheric waves. The study includes summer and winter events in Northern hemisphere and winter events in Southern hemisphere.