The 1/3 of the rain is absolute minimum. The expected case with the current setup is ~50% rain or thunder storm. And I doubt a simple script would help as at the moment rain will stop after at most 14 min 7/8 of the time. There is 1/8 chance that rain storm will become a thunder storm, in which case it will continue for at least 10 min more, with another 1/8 chance of repeating at the end.
If I had the mean and deviations for vanilla sunny, rainy and thunder periods, this would be a simple fix. But until we have the stats the only thing we can do is fiddle with the numbers until it feels right.
If I had the mean and deviations for vanilla sunny, rainy and thunder periods, this would be a simple fix. But until we have the stats the only thing we can do is fiddle with the numbers until it feels right.