A series of strong thunderstorms developed all across Finland on July 10th. The most intense ones appeared in the east where a tornado was spawned and hail the size of eggs broke car windshields. In Helsinki one cell came close. It developed quickly off the coast of Estonia and headed northeast. While it just missed Helsinki, it did bring some rain and thundery conditions. What appeared to be mammatus-type clouds at one side of the storm were shortly visible. Unfortunately my long lens is what it is and my wide angle was too wide to capture the size of the possible mammatus clouds properly.