How is wind speed represented in meteorological observations?

Wind speed in meteorological observations is rounded off to the nearest 5 knots and is symbolized by various markers. The symbols used to represent different wind speeds are:

  • Full feather: Represents 10 knots (11.5 mph)
  • Half feathers: Indicates 5 knots
  • Pennant: Signifies 50 knots
  • Circle drawn around the station circle: Indicates calm conditions
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