CALL 100 is on the right track, but to amplify remember the dynamics of the surface.
A runway state is always changing, especially in the UK's predominentaly Maritime airflow. A Wet runway is always shedding water. A Damp runway just means the drying process is nearly complete. In the UK, Damp is defined as visible staining of the surface by moisture.
The requirement to inspect and report the condition of the RWY is contained in CAP168 and for anything other than Sleepy Hollow Int'l is barely enough.
Ops Officers worth their salt have a weather eye and keep the ATIS informed as significant events, that may affect a/c performance, are observed. And, if ATC from their lofty tower want another gander, then off he goes. (Never mind it's the first meal break in 6 hours
)
And how many of us have trundled to the hold on a luurvely summers day only to watch a midday shower drench the active just as your slot arrives
You screw up the calcs, tell Tower to wait one and crunch new numbers. You do, don't you?
Sir George Cayley