fot. Andrzej Ślebarski,
Meteorological Calendar 1999 (Royal Meteorological Society - UK)
„Striking cumulonimbus mammatus, together with crepuscular rays, photographed from Bielsko-Biała (southern Poland) at approximately 15 GMT on 28 March 1997. An active cold front, associated with a deep low then centered over the Gulf of Finland, had just passed over. The large pressure gradient produced violent north-westerly winds that caused considerable damage, and brought vigorous showers with some thunder.
