Complex sentence: Vidar Leif Theisen (5 May 1933--30 August 2012) was a Norwegian meteorologist, known for his monotone and nasal weather forecasts, which made him a cult star in Norway, even after his retirement.
Split into simpler sentences: Vidar Leif Theisen (5 May 1933--30 August 2012) was a Norwegian meteorologist, known for his nasal speech and lack of tonal variation during his presentations of the weather forecast. This uncommon speech pattern made him a cult star in Norway, even after his retirement.