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<xsd:documentation>The Beaufort wind scale is a system used to estimate and report wind speeds
when no measuring apparatus is available. It was invented in the early 19th Century by Admiral
Sir Francis Beaufort of the British Navy as a way to interpret winds from conditions. </xsd:documentation>
<xsd:documentation>A measure of the combined chilling effect of wind and low temperature on
living things, also named chill factor, e.g., according to US weather service table, an air
temperature of 30 degF with a 10 mi/h corresponds to a windchill of 22 degF. </xsd:documentation>