6. Barometric Pressure Atmospheric pressure as indicated by a barometer. Barometric pressure is measured in terms of the downward force that the atmosphere exerts per unit of a certain area.
12. Wind Directions Wind direction is reported by the direction from which it originates. Wind direction is usually reported in cardinal directions. North, south, east, west, north-east (NE), north-west (NW), south-west (SW), and south-east (SE).
15. Percent of Cloud Cover How covered the sky and the sun is with clouds. It is estimated visually. The amount of the sky covered by cloud is defined in oktas or eighths.
21. Precipitation Rain, sleet, hail, snow and other forms of water falling from the sky. The precipitation can be measured with different types of gages.