Thanks for the inputs, I will be advocating slow rather than fast speaking rate though it is our client, the air traffic authorities, who get the last say and they are also the ones who decide on the inclusion of the obstruction and bird warnings nonetheless knowledge of these concerns is useful when we are talking to our client.
We can include any values that the instrumentation provides which nowadays includes wind, pressures, temps pretty much as a minimum. RVR, present weather and cloud cover.
Wojtus, as an ATCO what is your preferred method of updating an ATIS?