How we derive ET is the same whether you are using WIP or not. It does have much better weather intelligence than Gen1/2. We give the user two distinct options now.
Interpolated weather data that you don’t have to worry about stations going down or not reporting precipitation which takes the burden off the homeowner of making sure they have an accurate reporting station. Interpolated data is great but won’t be exactly the measured amount that a PWS would give you near the house.
The ability to choose from over 250,000 PWS stations (Gen 1/2 has about 40,000 PWS stations). 80% of controllers are within 1 miles of a WU PWS station. For contrast, only 8% of Gen 1/2 controllers are within 1 mile of a pwsweather.com (PWS,CWOP) or National station. I’m also wrapping up a WI plus feature that will self “heal” a chosen station, always making sure you are using one that is online, automatically choosing the next closest station.
If you can connect your PWS to WU and use our flexible daily schedules, I think you will be surprised at what the system can do. I’m not trying to oversell but no other controller will do what our flex daily schedules do. It’s extremely difficult and I guarantee none of the cheaper models (ahem…) have that level of sophistication. ET might be your only issue (not produced from your station), but how we derive it has worked great for most folks.