The Beaufort scale was extended in 1946, when forces 13 to 17 were added.

The Beaufort scale is a way to measure weather conditions, based on observations.

The Beaufort scale is a way to tell how strong the wind is.

The Beaufort scale, for example, shows the correspondence between wind speed and sea states.

Taiwan uses the Beaufort scale with the extension to 17 noted above.

The numbers refer to the Beaufort Scale of wind strength.

In the lift I decided that the Beaufort scale was at least eight, more likely nine.

The Beaufort scale was first introduced in 1805, and in 1921 quantified.

The Beaufort scale is a scale for measuring wind speeds.

In the middle of the night, the wind speed reached hurricane force 48-55 m/s (12 on the Beaufort scale).

The wind was fairly steady, about Force 9 on the Beaufort scale, and the snow had stopped.

"The Beaufort scale," he says, "is about paying attention.

Strictly, the Beaufort Scale applies to the average wind speed over a 10 minute period.

The strongest winds were Force 8 on the Beaufort scale, meaning gale-force.

Registers force fifteen on the Beaufort scale.

A whole gale is a wind of force 10 on the Beaufort Scale, ranging in strength from 48 to 55 knots.

The beaufort scale is still generally used to determine wind speed from manual observers out at sea.

Wind strength was recorded as northerly 32 knots, which is almost gale force 8 on the Beaufort scale.

There were a hundred days when the U-boats reported winds topping force 7 on the Beaufort scale.

The Beaufort scale measures wind force.

The crossing took 7 hours 20 minutes, with mid-Channel wind conditions reaching force 5 on the Beaufort scale.

A measurement of windspeed using the Beaufort scale.

However, a scorpion can detect air moving at 0.072 kilometres per hour - 100 times slower than a light breeze on the Beaufort scale.

On August 9, a ship reported rough seas and winds of force 10 on the Beaufort scale.

Beaufort was the creator of the Beaufort Scale for indicating wind force.

The Beaufort scale, for example, shows the correspondence between wind speed and sea states.

The Beaufort scale is a way to measure weather conditions, based on observations.

The Beaufort scale is a way to tell how strong the wind is.

Beaufort scale - For winds less intense than hurricane strength.

Taiwan uses the Beaufort scale with the extension to 17 noted above.

In the lift I decided that the Beaufort scale was at least eight, more likely nine.

The numbers refer to the Beaufort Scale of wind strength.

The beaufort scale is still generally used to determine wind speed from manual observers out at sea.

The Beaufort scale is a scale for measuring wind speeds.

The researchers chose to standardise the terms into their Beaufort scale equivalents.

The wind was fairly steady, about Force 9 on the Beaufort scale, and the snow had stopped.

Strictly, the Beaufort Scale applies to the average wind speed over a 10 minute period.

"The Beaufort scale," he says, "is about paying attention.

Wind speed on the 1946 Beaufort scale is based on the empirical relationship:

The strongest winds were Force 8 on the Beaufort scale, meaning gale-force.

A measurement of windspeed using the Beaufort scale.

The weather deteriorated to Beaufort scale force 12 with winds at 70 to 90 knots and temperatures 40 below zero.

Registers force fifteen on the Beaufort scale.

Wind strength was recorded as northerly 32 knots, which is almost gale force 8 on the Beaufort scale.

The crossing took 7 hours 20 minutes, with mid-Channel wind conditions reaching force 5 on the Beaufort scale.

There were a hundred days when the U-boats reported winds topping force 7 on the Beaufort scale.

Wind direction is given first, then strength (on the Beaufort scale), followed by precipitation, if any and (usually) lastly visibility.

The Beaufort scale measures wind force.

Beaufort scale: index of wind strengths.

On August 9, a ship reported rough seas and winds of force 10 on the Beaufort scale.