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Beaufort force 4. Sustained wind speeds in the range of 11 to 16 knots. Small waves, becoming longer, fairly frequent white horses.
wind moving 13-18 knots; 4 on the Beaufort scale
In the Beaufort wind scale, a wind whose speed is from 11 to 16 knots (13 to 18mph).
Wind with a speed between 11 and 16 knots (13 and 18 mph); Beaufort scale number 4.
In the Beaufort wind scale wind with a speed from 11 to 16 knots (13 to 18 mph) or Beaufort Number 4 (Force 4).
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