What happens when a weather station is offline? Does it depend on if the request is either a latitude,longitude pair or a pws id? If it is offline, is the next best weather station used for both types of queries? This is for historical measurements.
If a station is offline is it still possible to look at the history? I can't see how to do find it on wunderground for a station that was reporting to wunderground for some years, has gone permanently offline, but has left a huge amount of observation on the wunderground database. If data isn't accessible like that then there's not much point creating and building such a useful record?
Using pws... I have a preferred pws in my area. When it doesn’t report updates in 2 hrs., I then check the next pws I like in my area. If that one is showing old data also, I default to a city lookup (which sometimes worthlessly reports very distant stations). Could be program will freeze up or otherwise error if the WU site id/connection is actually deleted. Usually, these pws's I track come back in a few weeks or so (assume issues at those locations got solved).