Spyro
Registered
The probababillity is a trigger, indeed. I started to use this allready for darksky. Above 75% you should get rain, below 25% no rain. Between its a probabillity trigger. Random, with increasing probabillity towards 75%.
And without it, you would get rain much more often. The API has no rain gauge. It evaluates rain radar, cloud radar, something like this. Its not based on a real weather station if you ask me. There are not every 100m in real word weather stations with rain gauges for exact measurement. So the API counts "virtual" rain or calculates a virtual rain "rate", but it is saying not sure whether this actually really happening as rain on ground.
Furthermore there is a threshold for rainrate, if exeeding a threshold you get rain. I once witnessed a heavy wide shower in the rainforest on the radar, with >25mm/sec rain (pretty much) and the probabilltiy was only 40% - does not make sense sometimes what API reports.
If you say 20% triggered rain i might have to check something- but maybe threshold was exceeded
Thanks for the detailled explanation !
Just for clarification, we had a 30% probability of rain which gave (sometimes) a 20% of rain on rF2. Following your explanation, everything seems to work as expected.