Glossary
An explanation of some of the readings displayed on the current weather page.
TEMPERATURE Outside air temperature (°C) A measure of the average energy of molecules in the atmosphere.
HUMIDITY Relative humidity (%) is the amount of water vapour present in the air expressed as a percentage of the amount of water vapour that the air is capable of holding.
DEW POINT A measure of humidity stated in terms of the temperature at which the air would be saturated and dew would begin to form if the amount of water vapor in the air were held constant.
WIND Wind speed (Km/h). Wind direction. The direction from which the wind is blowing (expressed as a compass direction).
BAROMETER (Atmospheric Pressure) The pressure exerted by the weight of the air above the observer. (1hPa = 1hectoPascal=1mbar)
TODAY'S RAIN Total rain last 24 hours reset at midnight
RAIN RATE Rainfall rate (mm/hr) is a measure of how much rain falls in a unit of time.
STORM TOTAL Storm total displays the rain total of the last rain event. The Davis Weather Instrument takes .4mm to begin a rain event and 24 HOURS WITHOUT RAIN to end a rain event.
MONTHLY RAIN Total rain for the calendar month.
YEARLY RAIN Total rain calendar year.
WIND CHILL Wind Chill (°C) takes into account how the speed of the wind affects our perception of the air temperature. The faster the wind blows, the faster heat is carried away from your body and the colder you feel.
THW INDEX (Temperature Humidity Wind) The THW Index uses humidity, temperature and wind to calculate an apparent temperature that incorporates the cooling effects of wind on our perception of temperature.
TEMPERATURE Outside air temperature (°C) A measure of the average energy of molecules in the atmosphere.
HUMIDITY Relative humidity (%) is the amount of water vapour present in the air expressed as a percentage of the amount of water vapour that the air is capable of holding.
DEW POINT A measure of humidity stated in terms of the temperature at which the air would be saturated and dew would begin to form if the amount of water vapor in the air were held constant.
WIND Wind speed (Km/h). Wind direction. The direction from which the wind is blowing (expressed as a compass direction).
BAROMETER (Atmospheric Pressure) The pressure exerted by the weight of the air above the observer. (1hPa = 1hectoPascal=1mbar)
TODAY'S RAIN Total rain last 24 hours reset at midnight
RAIN RATE Rainfall rate (mm/hr) is a measure of how much rain falls in a unit of time.
STORM TOTAL Storm total displays the rain total of the last rain event. The Davis Weather Instrument takes .4mm to begin a rain event and 24 HOURS WITHOUT RAIN to end a rain event.
MONTHLY RAIN Total rain for the calendar month.
YEARLY RAIN Total rain calendar year.
WIND CHILL Wind Chill (°C) takes into account how the speed of the wind affects our perception of the air temperature. The faster the wind blows, the faster heat is carried away from your body and the colder you feel.
THW INDEX (Temperature Humidity Wind) The THW Index uses humidity, temperature and wind to calculate an apparent temperature that incorporates the cooling effects of wind on our perception of temperature.
DISCLAIMER
All data offered by this website is from an amateur weather observation station and should be used and accepted at face-value data and should not be used for commercial purposes.
© Copyright Granite Hills Weather 2011
All data offered by this website is from an amateur weather observation station and should be used and accepted at face-value data and should not be used for commercial purposes.
© Copyright Granite Hills Weather 2011
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