They used to call it "Weather prediction", but that some how has been dropped.
I still think that looking out the window gives you a pretty good idea of what going on.
Also found that the time it is guaranteed to rain, is the day you leave your wet weather gear at home.
+1 for being let down by what they say is going to happen, when I did my long haul commute, got caught out so many times & the 80 kay trip home was miserable when it rained. By the time you think "Maybe I should pull over & get suited up" & actually doing it, your soaked to the skin anyway & putting on wet weather when your already wet is pretty hard.
Nothing worse than sweating on a week end run that you have been hanging out to do, weather man says "Fine" the night before & you wake up with grey sky's. You just want to punch their happy smiling condescending lights out.

 

Working on my bike outside has gotten delayed soooo many times... My victory lap got delayed soooo many times.....

I named my bike 'Rain'