Usage of temperatureTrend and maxTemperature

[mnchaser]

Ultimately, I'm looking for the 'best' way to determine H/L temp for a given day.

Looking for validation of understanding related to 1. temperatureTrend (gridpoint/forecast) and 2. maxTemperature (gridpoint):

1. temperatureTrend (gridpoint/forecast)
   Forecasts are given for two periods each day (order depends on when the forecast is requested, but assume it's run at 12Z).
   Example: Period 1 = Day 1 Day, Period 2 = Day 1 Night, Period 3 = Day 2 Day, and so on

The default expectation is that with diurnal heating, the "day" period temp will always be the max temp, and the "night" period temp will be the low temp. In both of these cases, the temperatureTrend value will be null.

If the temperatureTrend value is NOT null, it will either be rising or falling and indicates non-diurnal temps. Ex. if the daytime period temp is set to some value (15C) and temperatureTrend is set to "falling" .....

Questions:
-Does this mean that 15C is the low?
-OR, that 15C will be the highest value (at the beginning of the period) and all values during the period are lower?

-Does this mean the following period (night) could have a temp of 10C, and therefore 10C is the actual low for the "day" ?

-What if Period 1 = 15C + falling..... and temps in Period 2 initially drop below 15C, but then rise to 20C.

-How are Max/Min values calculated in these scenarios non-diurnal scenarios?

2. maxTemperature (gridpoint)
   maxTemperature returns a collection of values for different forecast periods. Same for minTemperature.

max: Each period is valid 13Z for 13hrs. Converting to CDT, this is 8am - 9pm.
Q: What if the maxTemperature is reached at 10pm ?

min: Each period is valid 01Z for 14hrs. Converting to CDT, this is 8pm - 10am.
Q: What if the lowTemperature is reached at 11am?

Thank you!