Known icing conditions exist when visible moisture or high relative humidity combines with temperatures near or below freezing. Icing conditions are only present in temperatures between 0ºC and -40ºC, with the highest risk occurring between 0ºC and -15ºC. The size and temperature of the supercooled water droplets that impact on the aircraft determine the category of ice that is formed. Icing is prominent between 600hPa to 700hPa level. Shown here is the icing condition at 600hPa level for the South American Region for the next ten days.
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