Do roku 2016 raport oznaczony numerem 1 był tworzony za okres od 1 kwietnia do 31 maja. Od roku 2017 analizy są wykonywane o dekadę wcześniej czyli 1 raport oznacza okres od 21 marca do 20 maja

Communication report regarding the incidences of drought conditions in Poland

Year: 2010; period: 01 (1.IV - 31.V)

The Institute of Soil Science and Plant Cultivation - National Research Institute in accordance with the requirements from the Ministry of Agriculture and Rural Development regarding indicators of climatic water balance for each plant species and soils, has developed the value of climatic water balance for all Polish municipalities (3,064 municipalities). Calculations have been made and based on the soil categories defined in the municipalities for the current risk of agricultural drought for the following crops: winter and spring cereals, oilseed rape and turnip rape, sugar beet, shrubs, fruit trees, and strawberries.

In the first reporting period, i.e. from 1 April to 31 May 2010, drought conditions have not occurred in Poland. The climatic water balance values (CWB), on the basis of which the risk assessment of drought is calculated in most parts of parts of Poland was positive. CWB calculated for the above-mentioned crops were much higher than the critical value.

The value for April, in terms of heat in the Pomorskie voivodeship was normal, in other areas of the country; the air temperature was higher than the average long-term from 1 to 1.5 °C. In May, the temperature was higher than the annual average.

The precipitation in April on the coast, Warmia and Lublin was low (25 to 50% of the long-term norm). In central Poland, Podlasie, Mazowieckie, and Wielkopolskie were normal, while precipitation occurring in the southern parts of the country reached 150% of the norm.

In May, especially in the middle ten days of this month, very high precipitation was recorded over the whole country, which significantly exceeded the average value of the long-term norm - not just cushioning the effects of unfavourable meteorological conditions occurring in April in the north, but in central and southern parts, causing flooding in many places and fields.

The CWB with slightly negative values showing no risk of agricultural drought, occur only in the north of the country and in the Wielkopolska (western part) and Podlasie. The remainder parts of Poland were characterised with positive values of CWB, while in the south were calculated at a very high level. Currently, the country is not experiencing problems related to a deficit of water for crops, while there are significant problems with an excess of water. In many localities, the precipitation was over 300 mm and in some areas, it was measured up to 600 mm (around Bielsko-Biala). The precipitation was much higher than the average value of 100-150% or even 200% in places. There is a large excess of water present in the southern provinces: Dolnoślaskie, Śląskie, Malopolskie and Podkarpackie.