I have the same issue for hourlyForecast, what is the maximum number fo hourly forecast that WeatherKit can return?

They are between 0 and 1 so its clear what the fields mean but more documentation or information about changes to the API would be useful...

Thanks for confirming!

Thank you for providing an example! Is it also possible to retrieve historical weather alerts? I have tried passing hourlyStart and currentAsOf but only current alerts are returned.