BBC - Weather Centre - WeatherWise


Barograph:	An instrument that provides a continuous record of air pressure on a paper strip.
Barometer:	An instrument for measuring atmospheric pressure and used to predict the weather.
Beaufort Scale:	A scale that indicates wind speed by the effect wind has on familiar objects.
Black Ice:	Transparent ice that forms when liquid water on the ground freezes - for instance when the temperature falls sharply after rain.
Blizzard:	Snow blown by winds with an average speed of at least 52 km/h (32 mph).

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