I need an alarm on my monitor to alert me to a specific email in my mailbox. How do I set it up?

I will receive in my yahoo mailbox information that I need to view asap when it arrives. This will occur bi-weekly at no specific time or day. How to get an alert that the specific email is in my mailbox? The sender will be the same.

I need an alarm on my monitor to alert me to a specific email in my mailbox. How do I set it up?
i don't believe that is an availible option for yahoo.