WITSML - Operations Weather Component Schema Date and time the information is related to. Name of company that supplied the data. Atmospheric pressure. The Beaufort wind scale is a system used to estimate and report wind speeds when no measuring apparatus is available. It was invented in the early 19th Century by Admiral Sir Francis Beaufort of the British Navy as a way to interpret winds from conditions. Minimum temperature above ground. Temperature of the atmosphere. Maximum temperature above ground. A measure of the combined chilling effect of wind and low temperature on living things, also named chill factor, e.g., according to US weather service table, an air temperature of 30 degF with a 10 mi/h corresponds to a windchill of 22 degF. Sea temperature. Horizontal visibility. The direction from which the waves are coming, measured from true north. Average height of the waves. An average of the higher 1/3 of the wave heights passing during a sample period (typically 20 to 30 minutes). The maximum wave height. The elapsed time between the passing of two wave tops. The direction from which the wind is blowing, measured from true north. Wind speed. Type of precipitation. Amount of precipitation. Description of cloud cover. Height of cloud cover. Current speed. Azimuth of current. Comments and remarks. Unique identifier for the weataher.