Freezing Rain Sample Clauses

Freezing Rain. In this country freezing rain is a rare but exceptionally dangerous condition. Freezing rain occurs when precipitation, which can initially be rain, snow or a combination of both, becomes rain when passing through a warm air layer, before entering a very cold layer of air close to the ground surface. It does not freeze immediately but forms ‘black ice’ on contact with any road surfaces even when not below freezing temperature. In general, freezing rain will be treated in a similar manner to snow, i.e. treatment in advance of and during the event and then treatment following as required. Prior to the arrival of the freezing rain a precautionary treatment will be carried out in the same manner as would be made prior to snow falling. The situation will be constantly monitored, with additional treatment being carried out immediately the rain commences and continuing until such time that the rain has ceased or the temperature of the road has risen above freezing. Freezing rain usually occurs along the line of an incoming warm front. If possible, to ensure maximum effectiveness of the salt, the precautionary treatment will be made in the same direction and immediately in advance of the weather front. Consideration will also be given to stationing vehicles at the point on the route where the weather front will hit first, in order that timely treatments can be undertaken. Some salt will inevitably be lost during and following treatment and therefore careful consideration will be given to the requirement for continued successive treatments.

Freezing Rain. Freezing rain is the name given to rain that falls when surface temperatures are below freezing. The raindrops become supercooled while passing through a sub- freezing layer of air, many hundred feet (or meters), just above the surface, and then freeze upon impact with any object they encounter. The resulting ice, called glaze, can accumulate to a thickness of several centimeters.