wifi.log disappeared? I had some trouble with my wifi connection so I figured, I could switch on logging for airport via

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport debug +AllUserLand +LogFile

Now as far as I remember, the +LogFileshould redirect the airport debug log from kernel.log to wifi.log. Checking Console, I notice that there is no wifi.log under /var/log/. On a closer look, I noticed that kernel.log disappeared as well. 

After some googling I found this post, in which it says that kernel.log was merged into system.log. Now if that is true, I'm suspecting that the reason I can't locate wifi.log might be that it was perhaps merged with system.log as well. Does anyone have some further info on this?
Mountain Lion does log a limited amount of information to 

/private/var/log/wifi.log

To read that file – and its siblings such as wifi.log.0.bz2 – use Console. 

Included with the operating system is a diagnostics app that can enable debug logging. With that level of logging enabled you can then use Console to: 


view all messages
add a system log query
and so on.


Also in Stack Exchange: 


Wifi Diagnostics get WiFi performance (2013-01-02)