You'll need to use a batch, then (to filter by notification date = today).
This causes the complications I alluded to above, though. If you have more than one record that is supposed to be sent "today" you will not be able to qualify the person more than once.
You'll need to add another field to the CO. For example, an Integer field Index. You increment that by 1 for each new record added during the same day. Then have multiple batches running, each filtering by a different Index. (there will naturally be a hard-coded max number of records based on the number of batches).
... View more