Cold front

A cold front is defined as the leading edge of a cooler mass of air, replacing at ground level a warmer mass of air, which lies within a fairly sharp surface trough of low pressure. It forms in the wake of an extratropical cyclone, at the leading edge of its cold air advection pattern, which is also known as the cyclone's dry conveyor belt circulation. Temperature changes across the boundary can exceed 30 °C (54 °F). When enough moisture is present, rain can occur along the boundary. If there is significant instability along the boundary, a narrow line of thunderstorms can form along the frontal zone. If instability is less, a broad shield of rain can move in behind the front, which increases the temperature difference across the boundary. Cold fronts are stronger in the fall and spring transition seasons and weakest during the summer. When a cold front catches up with the preceding warm front, the portion of the boundary that does so is then known as an occluded front.

Arctic Blast

Arctic Blast is a 2010 disaster film. Its world premiere took place at the 2010 Canadian Film Festival in Sydney, at the Dendy Opera Quays cinema, on 4 August.

Plot

The plot is centered on a colossal blast of heavily chilled mesosphere air, spreading over the Earth after a solar eclipse combined with the effects of environmental pollution caused a hole in the ozone layer. The catastrophic event threatens to engulf the entire world in ice. As Hobart, Tasmania, is hit by the cold front with temperatures of below -70 degrees Celsius, causing people to die almost instantaneously, physicist Jack Tait (Michael Shanks) tries to find a solution while protecting his family.

Cast

Production