What is a force 4 wind?
Whitecaps in rough water conditions. noun – Force 4 is a moderate breeze on the Beaufort Wind Force Scale, an empirical measure for describing wind speed based mainly on observed sea conditions (on land it is categorized by the physical effects it has on vegetation and structures).
What is force 6 wind speed?
Modern scale
| Beaufort number | Description | Wind speed |
|---|---|---|
| 5 | Fresh breeze | 8–10.7 m/s |
| 6 | Strong breeze | 22–27 knots |
| 25–31 mph | ||
| 39–49 km/h |
What is force 2 wind speed?
JetStream Max: Beaufort Wind Force Scale
| Beaufort Wind Force | Wind Average | Speed Range |
|---|---|---|
| 0 | 0 | <1 kt <1 mph <1 km/h |
| 1 | 2 kt 2 mph 3 km/h | 1-3 kt 1-3 mph 1-5 km/h |
| 2 | 5 kt 6 mph 9 km/h | 4-6 kt 4-7 mph 6-11 km/h |
| 3 | 9 kt 10 mph 16 km/h | 7-10 kt 8-12 mph 12-19 km/h |
What is Beaufort number?
The Beaufort scale is a scale for measuring wind speeds. It is based on observation rather than accurate measurement. The scale was developed in 1805 by Francis Beaufort, an officer of the Royal Navy and first officially used by HMS Beagle. There are twelve levels, plus 0 for “no wind”.
Is 20 mph too windy for beach?
Breezy is described as a sustained wind speed from 15-25 mph. Windy is a sustained wind speed from 20-30 mph. Sustained winds between 30-40 mph.
What is storm force 10?
56-63. Violent Storm. Exceptionally high (37-52 ft) waves, foam patches cover sea, visibility more reduced. 12. 64+
What is gale force wind?
gale, wind that is stronger than a breeze; specifically a wind of 28–55 knots (50–102 km per hour) corresponding to force numbers 7 to 10 on the Beaufort scale. As issued by weather service forecasters, gale warnings occur when forecasted winds range from 34 to 47 knots (63 to 87 km per hour).
What is force 3 wind?
Wind felt on face, leaves rustle, vanes begin to move. 3. 7-10. Gentle Breeze. Large wavelets, crests begin to break, scattered whitecaps.
What Is a Force 9 gale?
9. 41-47. 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.