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: 12 (21.VII - 20.IX)

In the twelfth reporting period, i.e. from 21 July to 20 September 2010, there was no occurrence of agricultural drought conditions in Poland. The values of climatic water balance (CWB), on the basis of which the risk assessment of drought is calculated were positive. The calculated values of CWB for the above-mentioned crops are much higher than the critical value.

This year's August was very warm. The highest average temperature (over 20°C) occurred in the Lublin region, while the lowest around 17°C in the Przedgórze Sudeckie and Pogórze Zachodniosudeckie.

The first twenty days of September were colder, and the air temperature ranged from 11-13°C. Only on the coast, the temperature slightly exceeded 13°C and in the southern Poland (only in the second ten days period).

In August, also a large variation in the sum of precipitation took place. The high rainfall was recorded in western and north-western parts of Poland and Western Beskidy, locally exceeding 200 mm (significantly higher than the long-term norm). However, lower precipitation, not exceeding 80 mm (close to the norm) occurred on the Silesian Plains and Uplands.

Poland in terms of precipitation in the first ten days of September was diverse, eastern and south-eastern parts of country experienced very heavy rainfall in some places amounting more than 100 mm. The precipitation in the rest of the country was much smaller, ranging from 10 to 30 mm.

In the second ten days of September, precipitation was much lower from 70 mm in the north-west to a few mm in the south of the country.

In the sixty-day period (as in previous periods) a clear upward trend in the value of CWB was continued. Relative to the previous reporting period, the value of CWB increased on average by about 30 mm, the highest value of CWB was in the north of the country, particularly on the coast - by more than 50 mm.

The highest value of CWB, even over 200 mm still occurred in the Żywiec region, which witnessed a significant volume of excess water, while the lowest values were in the vicinity of Kalisz, Opole, Dolny Śląsk, (0 to 30 mm) and in those parts of the Poland where the soil moisture is the best.