A windsock is defined as a truncated cloth, which is normally mounted on a pole such as in the airports, to evaluate the direction of the wind of the area. The device catches the air, which inflates the sock and flows in alignment of the direction of the wind. It is mounted on a pole with a mechanism so that it can fly freely and rotates on a pivot according to the direction of the wind. The entry point of the device has a larger cross-section of area and the exit has a smaller area giving it a shape of cone. It is done to increase the velocity of the wind when it passes through the sock keeping it horizontal with the ground.

The science of weather information is called meteorology, which is an important sector in the aviation industry. Pilots depend on the weather forecasting bulletin of the meteorology section to design their activities in the airport. The meteorologist is a scientist who takes help of several instruments of forecasting weather conditions including the windsock at the airport. Hence, weather forecasting is a technology, which is dependent on devices and sophisticated instruments to understand the atmospheric conditions of a definite area or a place for certain fixed time.

The special pattern of wind that blows high up in the atmospheric region of the earth is called jet streams. They influence both high and low atmospheric pressures, which are observed by scientists. It is evaluated with a complex instrument, which is used by meteorologists of forecasting weather conditions of the area. The entire arrangement of apparatus includes satellites, bunch of computers, barometers and many more devices, which are available in the modern days. Earlier, when the technology had not advanced like today, meteorologists used to rely on minute observations of the weather conditions and experiences of the individual scientist. They were able in forecasting the weather up to some extent with genuine observations of the weather conditions and used to take help of socks flying in the open area.

As an amateur, you can also forecast the weather conditions with the support of ordinary devices such as a thermometer, a windsock, an anemometer, the barometer, and the ordinary rain gauge. You must use minute observation power to evaluate the actual weather conditions so that you are capable of forecasting probable changes in the atmospheric conditions perfectly. Thermometer is an ordinary tool with which you can obtain the temperature of the atmosphere and if you maintain the record of the temperature of the air for some consecutive days, you can identify the trend of the temperature of the atmospheric conditions. The trend of the temperature is a great way in forecasting weather conditions of the place. Rain gauges are useful to understand the quantity of rains. If you identify heavy rains for consecutive days, it generally points out to foggy weather in recent future. It also helps know the humidity level of the area. The barometer tells about the pressure of the place, which is a great factor for weather changing conditions. Low pressure of the atmosphere may bring heavy rains and high pressure identifies with calm weather.

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