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The main objective of this study is to outline the spatial distribution of precipitation deficit at both monthly and annual scales by comparing precipitation data from two reference periods: 1961–1990 and 1991–2020. To achieve this goal, monthly and annual precipitation normals from 355 meteorological stations throughout the country are calculated in accordance with the World Meteorological Organization's standards. Data post-processing, statistical analysis and spatial interpolation are performed in the R env...

The climatology of hot days and extremely hot spells on the territory of Bulgaria has been studied on the basis of daily data for maximum air temperature during the warm half-year in the period 1961–2019 from 115 meteorological stations of the National Institute of Meteorology and Hydrology (NIMH). The empirical distributions of daily maximum air temperatures by selected stations representative of the non-mountainous regions of the country (below 1000 m altitude) have been investigated to determine the correspondi...

The aim of the study is to present variation of days with hail precipitation in different regions of Bulgaria and seasonal synoptic classification of such type of extreme events. Examined period is 1991 – 2020. Time-space distributions of days with hail events, detected in at least one station from meteorological network of the National Institute of Meteorology and Hydrology are presented, as well as the regime of wide-spread hail events. The hail precipitation which are detected in at least 4 districts in Bulgari...

The object of this study is the variability and trends of extreme 24-hour precipitation in Bulgaria during the period 1931?2019. The regime of potentially dangerous precipitation (? 60 mm/24 h) has been analyzed on the base of available daily data from all stations of the national meteorological network with continuous observations at least in half of the study period. We focused our attention on this type of precipitation because it often causes significant economic damage and human casualties. The advanced tools...