Weather Station Definitions
- High/Low: On the day, week, month reports high/low values are given. These values are for the period defined as a day, week, or month. The day started at Mid night, a week on midnight on Sunday, and a month on the first day of the month.
- Total/Max: Total rainfall is over the same period as for the High/Low defined above. Max wind speed is also defined over the same periods.
- Heat Index: Is an index that combines air temperature and relative humidity, to a human-perceived equivalent temperature, as how hot it would feel if the humidity were some other value in the shade. The result is also known as the "felt air temperature", "apparent temperature", "real feel" or "feels like". For example, when the temperature is 32 °C with 70% relative humidity, the heat index is 41 °C. Displayed for temperatures above 27 °C with Humidity above 40%.
- Wind Chill: Reported at temperatures less than 10 °C and wind speed greater than 3mph.
- Dew Point: The dew point is the temperature to which air must be cooled to become saturated with water vapor. When cooled further, the airborne water vapor will condense to form liquid water (dew). If the air temperature is below the dew point then dew will condense on solid surfaces.
- Barometer: Records the atmospheric pressure. High pressure normally associated with good weather low pressure normally associated with wind and rain. Readings are in mbar. Normal median atmospheric pressure is 1013mbar. Low pressure <1000mbar, high pressure >1020mbar.
- Wind: On this station in Miles per hour, mph. Reports max (highest speed gust) and two averages.
- Wind Average: Arithmetic average.
- Wind RMS: Route mean square average, defined as the square root of the mean square (the arithmetic mean of the squares of a set of numbers).
- Wind direction: This is given in degrees.
East = 90 Degrees
South = 180 Degrees
West = 270 Degrees
- Wind Vector: Represents the motion of the air mass over the ground. It is described by wind speed and the inverse of wind direction. Note that by convention wind direction is given as the direction the wind is from. In a vector diagram, the wind direction must be stated as the direction the wind is blowing to, or 180 degrees different from the convention. In the Wind Vector chart the line is drawn between the average wind speed and the director from which is blowing to. Thus if the average wind is say 20mph from the West then the line drawn will be a vertical line between 20mph (+ve) and the horizontal mid line of the chart. Were the wind from the South West then the line between 20mph (+ve) and the horizontal mid line would be at 45 degrees to the vertical sloping backwards. If the wind were 20mph from the East then the line would be vertical between 20mph (-ve) and the horizontal mid line.