the next best thing to wheel or fire

I have tickets to attend the National Bank Open (tennis) here for six consecutive sessions, day and evening for tomorrow, Tuesday and Wednesday. Unfortunately the weather forecast is showing omnipresent incessant rain for at least Monday and Tuesday.

The inclement weather policy is that if the session is cancelled for this reason, I can use what I paid on that session's ticket to buy a ticket, based on availability, of a subsequent session, paying the difference (if any), and only if there is availability. As the tickets for subsequent sessions are more expensive, I would like to see if I can combine my tickets for the first two sessions to attend a single session later. It is doubtful that if this is an automated system that manages this, that it would allow such a two to one session change. I have Thursday and Friday off work, as well as the following Monday, and so if I am able to get future session tickets on any of Thursday-Monday, I am available to go.

I just checked the tennis tournament website and found it does not yet say anything about the weather affecting tomorrow's matches even though the weather forecast for tomorrow clearly shows rain all day at 70% probability or higher. I will, of course, check again tomorrow morning before I leave to see if there is any announcement made.

I have a poncho I bought a few years ago explicitly for bringing to this event, but if the whole session is rained out, there isn't a point of going at all.