WCmore's Graphs
twcweather.forecast.daypart[0]
Twice a day, some of 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. Frequently, it changed between 3:02 and 3:07, but in reality, the time varies quite a bit from day by day.
Here is a quick graph to show how much variety over 15 days... (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).
WebCoRE's official page on $twcweather.forecast.daypart[0]
$twcweather.conditions.sunriseTimeLocal
So far, the sunrise/sunset times seem to change over between 12:00 and 12:10, as seen here:
