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EA:  BEAUFORT_WIND_SCALE

Status: STD 2005/06/07
Code: 155
Concept definition: The force of a <WIND> on the Beaufort scale (originally based on the associated state of a <WATERBODY_SURFACE>).
 
Attribute value type: ENUMERATION
Reference type: PR
Reference: [WMO182, B0620, "Beaufort scale"]
Supplemental references:  
Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07		 BEAUFORT_WIND_SCALE CALM Beaufort Number 0 (calm): <<WIND_SPEED>> less than or equal to 0,5 metres per second (1 knot). A <WATERBODY_SURFACE> is smooth and mirror-like. On <LAND>, <SMOKE> rises vertically. 1 PR [WMO306, Volume I.1, Part A, Section E: "calm"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE FRESH_BREEZE Beaufort Number 5 (fresh breeze): <<WIND_SPEED>> greater than 8,3 and up to 10,9 metres per second (between roughly 17 and 21 knots). Moderate <WATER_WAVE>s, taking a more pronounced long form; many whitecaps; some spray. <<MEAN_WAVE_HEIGHT>> of 1,8 metres (roughly 6 feet). On <LAND>, medium branches move and debris moves about. 6 PR [WMO306, Volume I.1, Part A, Section E: "fresh breeze"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE GALE Beaufort Number 8 (gale): <<WIND_SPEED>> greater than 17,2 and up to 20,8 metres per second (between roughly 34 and 40 knots). Moderately high <WATER_WAVE>s of greater length; edges of crests; foam is blown into well-marked streaks along the <DIRECTION> of the <WIND>. <<MEAN_WAVE_HEIGHT>> of 6 metres (roughly 20 feet). On <LAND>, twigs break off <TREE>s and lawn furniture rocks. 9 PR [WMO306, Volume I.1, Part A, Section E: "gale"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE GENTLE_BREEZE Beaufort Number 3 (gentle breeze): <<WIND_SPEED>> greater than 3,4 and up to 5,6 metres per second (between roughly 7 and 10 knots). Large wavelets; some crests begin to break; occasional white foam crests. <<MEAN_WAVE_HEIGHT>> of 0,3 metre (roughly 1 foot). On <LAND>, leaves and small twigs are in constant motion. 4 PR [WMO306, Volume I.1, Part A, Section E: "gentle breeze"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE HURRICANE Beaufort Number 12 (hurricane): <<WIND_SPEED>> greater than 32,4 metres per second (64 knots). The <AIR> is filled with foam and spray. A <WATERBODY_SURFACE> is completely white with driving spray; visibility very much reduced. <<MEAN_WAVE_HEIGHT>> of 18,3 metres (roughly 60 feet) and greater. On <LAND>, <BUILDING>s suffer widespread damage, power lines are downed, <TREE>s are broken, and <MOTOR_VEHICLE>s are blown off the <ROAD>s. 13 PR [WMO306, Volume I.1, Part A, Section E: "hurricane"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE LIGHT_AIR Beaufort Number 1 (light air): <<WIND_SPEED>> greater than 0,5 and up to 1,5 metres per second (between roughly 1 and 3 knots). A <WATERBODY_SURFACE> is characterized by scale like ripples without foam crests. <<MEAN_WAVE_HEIGHT>> of 7,5 centimetres (roughly 0,25 foot). On <LAND>, <SMOKE> drifts but <WIND_VANE>s do not move. 2 PR [WMO306, Volume I.1, Part A, Section E: "light air"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE LIGHT_BREEZE Beaufort Number 2 (light breeze): <<WIND_SPEED>> greater than 1,5 and up to 3,4 metres per second (between roughly 4 and 6 knots). Small, short wavelets; crests have a glassy appearance and do not break. <<MEAN_WAVE_HEIGHT>> of 15 centimetres (roughly 0,5 foot). On <LAND>, <WIND_VANE>s are affected and leaves rustle. 3 PR [WMO306, Volume I.1, Part A, Section E: "light breeze"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE MODERATE_BREEZE Beaufort Number 4 (moderate breeze): <<WIND_SPEED>> greater than 5,6 and up to 8,3 metres per second (between roughly 11 and 16 knots). Small <WATER_WAVE>s, becoming longer; numerous whitecaps. <<MEAN_WAVE_HEIGHT>> of 1 metre (roughly 3 feet). On <LAND>, small branches move and <DUST> is raised. 5 PR [WMO306, Volume I.1, Part A, Section E: "moderate breeze"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE NEAR_GALE Beaufort Number 7 (near gale): <<WIND_SPEED>> greater than 14,1 and up to 17,2 metres per second (between roughly 28 and 33 knots). A <WATERBODY_SURFACE> heaps up; white foam from breaking <WATER_WAVE>s begins to be blown in streaks along the <DIRECTION> of the <WIND>. <<MEAN_WAVE_HEIGHT>> of 4,6 metres (15 feet). On <LAND>, entire <TREE>s are in motion, walking is difficult, and a roar can be heard in pine <TREE>s. 8 PR [WMO306, Volume I.1, Part A, Section E: "near gale"]  
STD
2005/06/07		 BEAUFORT_WIND_SCALE STORM Beaufort Number 10 (storm): <<WIND_SPEED>> greater than 24,4 and up to 28,4 metres per second (between roughly 48 and 55 knots). Very high <WATER_WAVE>s with long overhanging crests; foam in great patches is blown in dense white streaks along the <DIRECTION> of the <WIND>; visibility is reduced. <<MEAN_WAVE_HEIGHT>> of 12 metres (roughly 40 feet). On <LAND>, <TREE>s are uprooted, shingles on <ROOF>s are damaged, and <MOTOR_VEHICLE> motion is affected. 11 PR [WMO306, Volume I.1, Part A, Section E: "storm"]  
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