Friday 16 January 2015

Winter Temperatures 2

An extra paragraph has been added to the post "Winter Temperatures" dated 13 January, to list exceptions to the information given about the usage of maximum and minimum temperatures, in cases where the maximum temperature occurs during the night, and the minimum temperature occurs during the daytime, for the purpose of monthly reports and summaries etc.
This information is repeated below:

For the purpose of monthly reports, summaries etc, the extreme minimum and maximum for the 24 hour period concerned will apply, regardless of the time they were reached.
Exceptions to this are:
(i) when the temperature is higher at the beginning of the new 24 hr period [2200] than the maximum reached the next day but still shows a fall from the previous day's maximum to a night-time minimum, and a rise during the following day to that day's maximum.  In these cases the daytime maximum is used;
(ii) when the temperature is lower at the end of the current 24 hr period [2200] than the minimum reached the previous night but still shows a rise from that night's minimum to a daytime maximum, and a fall to the following night's minimum.  In these cases the previous night's minimum is used.

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