I was taxiing out in Madrass/Chenai a few months ago during the monsoon in torrential rain - I ask the Tower whats the runway state - They said 'wet'!
We could hardly taxy with the wippers on full blast ...
I delayed take-off!
It also brings another subject up in the recent UK and European WX of ATC reporting the braking action as 'unreliable' in the recent snow conditions.
I have heard this is becuase they cant accuratley measure braking action on snow - But who would land off a such a report?