Mountains and warm bodies of water can slow the movement of fronts.
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O'Boyle was asked to perform at Bellahouston Park in Glasgow on 16 September 2010 for Pope Benedict XVI where he was performing an open air mass for 100,000 people.
Hadley's erroneous reasoning had been in terms of a tendency to conserve linear momentum, as air mass travels from north to south or from south to north.