Forecast webtag: Difference between revisions

287 bytes added ,  10:38, 23 January 2021
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The forecast [[webtag]] attempts to predict a weather forecast for the coming 12 hours.  It uses an algorithm based on the pressure and trend, wind speed, the month and your hemisphere.  The initial formula was developed in the early 1900's and was based on years of observations and testing and proved to be around 91% accurate.  It is said to have been extensively tested by NATO in the most extreme weather conditions.  It has been demonstrated that the most accurate forecasts are based on readings taken at 9am however it apparently continues to give reliable results throughout the day. The algorithm is taken from a device known as a "Zambretti Forecaster".
The [[Webtags#Current_Conditions|Cumulus forecast]] attempts to predict a weather forecast for the coming 12 hours.   
 
It uses an algorithm based on the pressure and trend, wind speed, the month and your hemisphere.  The initial formula was developed in the early 1900's and was based on years of observations and testing and proved to be around 91% accurate.  It is said to have been extensively tested by NATO in the most extreme weather conditions.  It has been demonstrated that the most accurate forecasts are based on readings taken at 9am however it apparently continues to give reliable results throughout the day. The algorithm is taken from a device known as a "Zambretti Forecaster".


The findings have since been coded and included in Cumulus.  
The findings have since been coded and included in Cumulus.  
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The forecasting option was added in [[Version 1.8.3]]
The forecasting option was added in [[Version 1.8.3]] and remains available in Cumulus 2 and MX.




=Possible values=
=Possible values=


The <#forecast> webtag will return one of the following values, when the 'Cumulus Forecast' option is chosen. Otherwise, either a string supplied by your weather station will be returned, if it is able to supply one, or if not, 'Not available' will be returned:
The [[Webtags#Current_Conditions|<#forecast>]] web tag will return one of the following values, when the 'Cumulus Forecast' option is chosen. Otherwise, either a string supplied by your weather station will be returned, if it is able to supply one, or if not, 'Not available' will be returned.
 
The  [[Webtags#Current_Conditions|<#cumulusforecast>]] web tag will always return one of the following, and <#cumulusforecastenc> is available as an alternative with HTML encoding.


*Settled fine
*Settled fine
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