Winds aloft

Winds aloft, officially known as the winds and temperatures aloft forecast, (known as 'FD' in the US and Canada, but becoming known as 'FB', following the World Meteorological Organization nomenclature), is a forecast of specific atmospheric conditions in terms of wind and temperature at certain altitudes, typically measured in feet (ft) above mean sea level (MSL). The forecast is specifically used for aviation purposes. Winds aloft, officially known as the winds and temperatures aloft forecast, (known as 'FD' in the US and Canada, but becoming known as 'FB', following the World Meteorological Organization nomenclature), is a forecast of specific atmospheric conditions in terms of wind and temperature at certain altitudes, typically measured in feet (ft) above mean sea level (MSL). The forecast is specifically used for aviation purposes. The components of a winds and temperatures aloft forecast are displayed as DDss+/-TT: