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: 03 (21.IV - 20.VI)

In the third reporting period, i.e. from 21 April to 20 June 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 were only slightly negative in Central Poland. However, the CWB calculated values for Winter cereals, Spring cereals, Maize, Maize, Rape and turnip rape, Potato, Sugar beet, Hops, Tobacco, Field grown vegetables, Fruit shrubs, Fruit trees, Strawberries, Leguminous crops were much higher than the critical value. In the rest of the Poland, the CWB values are positive.

The temperature in May was higher than the average of the year in eastern part of Poland. In central Poland, the temperature was average and in the western parts was below the average. In the first ten days period of June a heat wave hit Poland, for several consecutive days the maximum temperature was above 30°C. While the second ten days of June in terms of heat was found to be very diverse, ranging from high temperatures in the southeast, where the average temperature exceeded 18 °C to a low (13 °C) in the northwest.

In May, especially in the second decade of this month across the country very high rainfall in the southern parts of the country reaching more than 150% of normal were experienced. The highest monthly precipitation values were recorded in May in southern Poland, ranged from 200 to 400 mm, extremely heavy rainfall occurred in Bielsko-Biala (511.5 mm), exceeding more than 500% of normal long-term. It should also be noted that precipitation in the western parts of the country, were slightly above the norm, or were normal (Zachodniopomorskie voivodeship).

In the first ten days of June, a large variation in precipitation was recorded. In the southern-eastern parts experienced very heavy rainfall in many places exceeding 100 mm, and in some places even more than 150 mm. However, in central Poland an average precipitation was recorded while in the northern parts of the country even below the average.

In the second ten days of June, precipitation was very diverse. In the southern parts of the country heavy rainfall were experienced, exceeding in many localities over 40 mm, and even over 60 mm. Similar size of precipitation occurred in Podlasie and Warmia and Mazury. However, in the western parts of the country in many areas, precipitation did not occur or were very small, not exceeding 2 mm.

Relative to the first reporting period in most areas of the country, the CWB value decreased by 5 ÷ 20 mm, but this reduction did not cause the risk of agricultural drought. However, in the regions of Lublskie (eastern part), Podlaskie, Śląskie increased by 10 ÷ 20 mm.

The lowest values occur in Żuławy CWB (-50 to -59 mm) and the western parts of the country at the crossroads of Lubuskie, Wielkopolskie and Zachodniopomorskie (-50 to -79 mm).

Continue in areas with heavy precipitation in May and June - CWB was at high values (over 200 mm). In areas where the value of CWB were the highest in the previous reporting period, now they have increased even more, reaching near Bielsko-Biala, more than 520 mm. In the southern parts of Poland no problems with the deficit of water for crops was recorded, but there are problems with a considerable excess of its requirement, especially in the southern parts of voivodeships: Opole, Slaskie, Malopolskie and Podkarpackie.