If you turn on the smart zone feature, Netro will skip the schedules(including manual schedules from user programs) when there is a chance of significant rain(>0.2inch).
For rain expectation, it uses the amount of rainfall multiplied by the probability of the rainfall to compare with the threshold. If the result is 0.2 inches or higher, than we will cancel watering schedules. For example, if rainfall is 0.2 inches but the probability is 50%, then 0.2*.5 = .1, 0.1 is less than 0.2, so the watering will go as scheduled. But if rainfall is 0.4 inches with 50%, then the Smart Zone will cancel the watering schedule for that day.