WCmore's Graphs
twcweather.forecast.daypart[0]
Twice a day the data stored under twcweather.forecast.daypart[0] shifts. Preliminary tests over 15 days (31 data points) shows it changes sometime between 3:00 and 3:30. Often it changes over within the first ten minutes, but I have seen it happen much later on occasions.
Here is a quick graph to show how much it varies day by day. (the numbers show how many minutes past 3 AM/PM)
The change over can't automatically trigger a piston, so to determine the time it changes I have to query it multiple times, and take note of when it changes. Each mark above denotes the last time the old data was seen, and the first time the new data was seen. The long bars are when I was checking every 5 or 10 minutes... The short bars are when I was checking every minute (to narrow it down more precisely).
For those wanting a reliable piston, I would make your queries at 3:35 AM/PM (or later) to assure that you are getting the new data. On the other hand, if you want to capture the old data right before it vanishes, I would grab that at 2:55 AM/PM (or earlier).
