Alert box inside a modal window

1. Is the alert dialog considered to be a modal window?
2. What is a warning modal?

Is the alert dialog considered to be a modal window?

A modal alert box is a subtype of a modal dialog window. It sends a short alert or prompts confirmation from the user, and are appropriate when: The message is no longer than one phrase. Punctuation is not necessary to understand the message.

What is a warning modal?

A warning message is a modal dialog box, in-place message, notification, or balloon that alerts the user of a condition that might cause a problem in the future. A typical modal warning message.