<Ul> <Li> Visibility is greater than 30 metres (98 ft) </Li> <Li> Windspeed is no greater than 55 knots (102 km / h; 63 mph) </Li> <Li> Air temperature and wind chill are no colder than − 73 ° C (− 99 ° F) </Li> </Ul> <Li> Visibility is greater than 30 metres (98 ft) </Li> <Li> Windspeed is no greater than 55 knots (102 km / h; 63 mph) </Li> <Li> Air temperature and wind chill are no colder than − 73 ° C (− 99 ° F) </Li>

Weather in antarctica the most extreme weather conditions