Home » Fieldwork » Beaufort Scale

Beaufort Scale

Facebook
Twitter
Pinterest
Print

Beaufort wind scale for land areas

  • Make your observations in an open location, e.g. school field.
  • Use the scale below to estimate wind speed.
  • Enter CALM if there is no wind.
Wind Force
Description
Speed
Specifications
kph
knots
0Calm00Smoke rises vertically
1Light Air1-51-3Direction shown by smoke drift but not by wind vanes
2Light Breeze6-114-6Wind felt on face; leaves rustle; wind vane moved by wind
3Gentle Breeze12-197-10Leaves and small twigs in constant motion; light flags extended
4Moderate Breeze20-2811-16Raises dust and loose paper; small branches moved.
5Fresh Breeze29-3817-21Small trees in leaf begin to sway; crested wavelets form on inland waters.
6Strong Breeze38-4922-27Large branches in motion; whistling heard in telegraph wires; umbrellas used with difficulty.
7Near Gale50-6128-33Whole trees in motion; inconvenience felt when walking against the wind.
8Gale62-7434-40Twigs break off trees; generally impedes progress.
9Strong Gale75-8841-47Slight structural damage (chimney pots and slates removed).
10Storm89-10248-55Seldom experienced inland; trees uprooted; considerable structural damage
11Violent Storm103-11756-63Very rarely experienced; accompanied by widespread damage.
12Hurricane118 plus64 plusDevastation

Start exploring

Latest from blog

Related posts

Wind is used to power things, you might see large windmills in the countryside. What you will need: Windmill printout…
Topics: Instruments
DIY Wind Meter A simple anemometer Equipment: Stick or broom handle. 5x10cm pieces of thin string or cotton. Tissue paper…
Topics: Instruments
Schools, teachers and Society members in the UK can borrow instruments such as anemometers, thermometers, rain gauges, infrared thermometers and Kestrel weather stations from
Topics: Fieldwork in Geography, Instruments
Thermometers are kept in special boxes (Stevenson screen) to protect them from sunshine, wind and the surroundings. You can make your own special box.
Topics: Instruments
BACK TO TOP