[drkrab]

I’m surprised how many places in the world measure rain in percentage chance. Must be a metropolitan concept. Here in Denmark, weather reports estimate mm/hr - the amount of rain. Maybe it’s our agricultural inheritance?

[gdulli]

If you're deciding whether to dress and prepare for rain you're more curious about whether it will rain or not than the amount.

[antirez]

The two things are not strictly related, you could have 30% chance of heavy rain, or 90% chance of light rain. Both are needed and many apps have both.

[Leftium]

https://weather-sense.leftium.com shows both mm/hr and percentage chance.

I've noticed there is a correlation, but having both is useful:

- Often there is a percentage chance, but the mm/hr is 0. At these times, it could rain but will probably be very light.

- Less common, but sometimes there is 0% chance, but a non-zero mm/hr.

[hexbin010]

Chill a bit with the spamming ;) (7 times in this one post currently)

[blackguardx]

mm/hr is more useful for areas that get lots of rain. When I was living in Seattle, chance of rain was meaningless but mm/hr made the difference between being able to do an outside activity or not. In California, chance of rain makes sense because it rains very little.

[chrneu]

Most places I look at report both probability and give a measurement prediction.

So it would be like "60% chance of rain after 2pm, total amount less than 1/10th of an inch"

[tonfa]

Meteoswiss has timeserie histogram with of amount of rain with confidence intervals (10th and 90th quantile)

It tells you all you need to know at a glance :)

e.g. see https://www.meteoswiss.admin.ch/images/1904/website/weather/...

(from https://www.meteoswiss.admin.ch/weather/weather-and-climate-...)