When the term 'light and variable' is used in reference to a Winds Aloft Forecast, what is the coded group and windspeed?

The term 'light and variable' in a Winds Aloft Forecast is specifically represented by the coded group 9900. This indicates that the winds are light, typically characterized by speeds that are less than 5 knots. The '9900' code effectively communicates to pilots that there are negligible winds, which can be significant when planning for flight operations, especially regarding takeoff and landing strategies. Pilots need to be aware that such light winds can lead to turbulence in certain situations, particularly close to the ground or when approaching obstacles. It is crucial for flight planning as it suggests minimal wind effect on aircraft performance during flight.