Polscy Łowcy Burz warn of severe weather phenomena that may occur with storms:

THUNDERSTORM STRENGTH AND ACTIVITY FORECAST FOR POLAND
Valid from 10 July 2017, 08:00 CEST to 11 July 2017, 08:00 CEST

LEVEL 2 WARNING is issued for southern and partly central Poland due to the risk of strong and gusty winds, heavy rainfall, large hail and tornadoes.

LEVEL 1 WARNING is issued for western, central and partly eastern Poland due to the risk of strong and gusty winds, heavy rainfall and hail, and to a lesser extent due to the risk of a tornado forming.

The Level 2 warning covers the following voivodeships: Śląskie, Małopolskie, Łódzkie and Świętokrzyskie. Level 1 covers: Lower Silesian, Lubusz, Greater Poland, West Pomeranian, Masovian and Kuyavian-Pomeranian. More information is available at www.lowcyburz.pl