Hello,

I am trying to locate the observation interval (averaging interval) for
the National Weather Service Weather Roundup (RWR) that provides
routine, standardized hourly observations for a sub-state region, an
entire state, or a multi-state region. I have reviewed all of the
relevant NWS directives and the federal meterological handbook but I am
unable to locate this information.

Specificially, I would like to know what time interval the weather
observations represent (for example I think that wind speed is a
2-minute average that occurred within the 15 minutes previous to the
hourly roundup), but does temperature represent an instantaneous value
observed at the actual time of the observation or does it represent a
15-minute average, or is it the average value for the entire hourly
observation? Similarly, what about other parameters such as humidity,
pressure, etc.?

Any help you can provide is greatly appreciated.

Thank you,
Fred Corey.