Because Weatherwise forecasts are the best that you can get. Our forecasts are not the cheap or free ones that are available from overseas sources that don’t know about Australian conditions. We purchase our forecasts from the Australian Bureau of Meteorology (BoM) . The BoM run multiple forecast models using super computers, and teams of meteorologists refine the results using their extensive knowledge of local conditions. They produce forecasts for over 400,000 points on a grid extending right across Australia. You’ll never be more than 3 km from the most accurate forecast in the country.
As an added bonus, if you're using water for a domestic garden (tick the box when subscribing), then you will receive our Weatherwise irrigation recommendations for the coming week.
SWAN Systems is a cloud-based decision support system for irrigators. The software analyses weather, irrigation, soil moisture, and fertiliser application data to provide recommendations for optimised irrigation – it takes the guesswork out of optimising water use. It also provides integrated modules for nutrient planning and management, and satellite data is used to generate a health (or “greenness”) index for sites based on absorption and reflectance data.
For more information, visit our SWAN Systems website .
We'll quote the Australian Bureau of Meteorology (BoM) here, "Evapotranspiration is the term used to describe the part of the water cycle which removes liquid water from an area with vegetation and into the atmosphere by the processes of both transpiration and evaporation." If you are interested, the BoM goes into more detail here .
The amount of water extracted by vegetation will depend on the land use, e.g. the amount of water extracted by a football oval covered in grass will differ from the amount used by a vineyard. Another factor is the crop stage; typically larger more mature crops will extract more water than young crops.
It would be impractical to forecast and publish evapotranspiration for a wide variety of crops so in most contexts "reference evapotranspiration" or ETo - the amount of evapotranspiration over a crop of green grass about 12cm (5in) high - is used and a "crop factor" is applied to adjust ETo for different crop types, growth stages and seasonal variation.
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Weatherwise's rainfall forecast comprises two items: a probability of rain and an expected range, but what exactly do they mean?
To mangle a well known quotation, "nothing in life is certain except death and taxes... and the rainfall forecast won't be right!" Of course weather forecasters know this very well so will often term their forecasts in terms of probability and chance and quote a range of possible rainfall figures. In this way, you will have more information to judge the likelihood of rainfall than you would have with a bald figure of Xmm rain.
For a much better explanation of this, visit this post from the Australian Bureau of Meteorology (BoM).
Weatherwise Watering is brought to you by SWAN Systems