Beaufort scale - Wikipedia
In Canada, maritime winds forecast to be in the range of 6 to 7 are designated as "strong"; 8 to 9 "gale force"; 10 to 11 "storm force"; 12 "hurricane force". Appropriate wind warnings are issued by Environment Canada's Meteorological Service of Canada: strong wind warning, gale (force wind) warning, storm (force wind) warning and hurricane ...
Beaufort Wind Scale - NOAA/NWS Storm Prediction Center
Strong Gale High waves (23-32 ft), sea begins to roll, dense streaks of foam, spray may reduce visibility Slight structural damage occurs, slate blows off roofs
Beaufort Wind Scale - National Weather Service
One of the first scales to estimate wind speeds and the effects was created by Britain's Admiral Sir Francis Beaufort (1774-1857). He developed the scale in 1805 to help sailors estimate the winds via visual observations. The scale starts with 0 and goes to a force of 12. The Beaufort scale is still used today to estimate wind strengths.
9级风 - 百度百科
蒲福风级是英国人弗朗西斯·蒲福（Francis Beaufort）于1805年根据风对地面（或海面）物体影响程度而定出的风力等级。 常用以估计风速的大小。 后几经修改，分成13个风级（0～12级）。 1964年后，增至18个等级（0～17级）。 风速与风力的折合关系式为：风速（米/秒）=0.835√F，式中F为风力等级数。 风速为该风等级的中数（取整数），指相当于10米高处的风速。 下表为蒲福风级表： 注:海上情况指在无屏障之大海上的情况。 风速指 海平面 上10米处。 …
Gale - Wikipedia
A gale is a strong wind; the word is typically used as a descriptor in nautical contexts. The U.S. National Weather Service defines a gale as sustained surface wind moving at a speed between 34 and 47 knots (63.0 and 87.0 km/h; 17.5 and 24.2 m/s; 39.1 and 54.1 mph). [1] Forecasters typically issue gale warnings when winds of this strength are ...
Beaufort Scale - National Geographic Society
2023年10月19日 · Strong breeze at 39-49 kph (25-31 mph). Umbrellas are hard to use; large branches on trees move. 7. Moderate gale at 50-61 kph (32-38 mph). Trees sway; walking in the wind is difficult. 8. Fresh gale at 62-74 kph (39-46 mph). Twigs and branches break off trees. 9. Strong gale at 75-88 kph (47-54 mph). Roof tiles blow off buildings. 10.
Beaufort Scale - National Weather Service
Gale: 34-40 kts: 18 ft (max 25) Moderately high waves of greater length. Edges of crests begin to break into the spindrift. The foam is blown in well-marked streaks along the direction of the wind. Head pushed back by the force of the wind if allowed to relax. Oilskins and loose clothing inflate and pull strongly. Halyards rigidly bent.
Estimating Wind - National Weather Service
Series of Pacific storms will continue to significantly impact portions of the West through this last weekend of 2024; Strong winds, high surf, heavy lower elevation rain and heavy mountain snow expected. Across the Plains, low visibility and dense fog …
Beaufort Wind Scale - Weather Prediction Center
2022年5月12日 · Near gale: 28-33: 32-38: Whole trees sway - difficult to walk: Wave height: 4-5.5 m (13.5-19 ft) - Sea: Sea heaps up - White foam blown around: 8: Gale: 34-40: 39-46: Twigs break off trees: Wave height: 5.5-7.5 m (18-25 ft) - Sea: Edges of crests break into spindrifts: 9: Strong gale: 41-47: 47-54: Shingles blow off roofs: Wave height: 7-10 m ...
Beaufort's Wind Scale - The Engineering ToolBox
The Beaufort wind scale, which is used to describe the force of the wind, was invented by Admiral Beaufort in 1805. With some experience with the use of the scale the wind force can be estimated with reasonable accuracy. The Beaufort wind scale is divided into series of values, from zero for calm winds, up to twelve and above for hurricanes.