The level of technology in the weather detection industry is staggering, with new inventions and advances being constantly introduced to more quickly and accurately measure the weather to ensure safety. One of the most frequently used measuring devices, however, is also the simplest and most low-tech: the windsock. By simply taking a quick glance in the direction of a fluttering windsock, anyone can make accurate interpretations about wind speed and direction.
Check to see if the wind is blowing hard enough to cause the windsock to orient itself in the direction the wind is blowing. According to FAA standards, a wind blowing at 3.5 mph (3 knots) will be sufficient enough to move a windsock in the direction of the wind.
View the direction the windsock is pointing. The wind direction is described as coming from the opposite direction the windsock is pointing. For instance, if the windsock is pointing toward the east, the wind is described as being a "westerly" wind.
Look at the angle of the windsock in relation to the pole upon which it is attached. FAA standards state that a wind speed of 17 mph (15 knots) will fully extend a windsock to a 90-degree angle in relation to the pole upon which it is attached. Wind speeds lower than 17 mph will allow the windsock to drop at angles less than 90 degrees.
