On 18 June 2013, a Boeing 737-800 crew en route to Adelaide learned that un-forecast below-minima weather had developed there and decided to divert to their designated alternate, Mildura, approximately 220nm away where both the weather report and forecast were much better. However, on arrival at Mildura, an un-forecast rapid deterioration to thick fog had occurred with insufficient fuel to divert elsewhere. The only available approach was flown to a successful landing achieved after exceeding the minimum altitude by 240 feet to gain sight of the runway. An observation immediately afterwards gave visibility 900 metres in fog with cloudbase 100 feet.