Well I found the answer to my question. I had to go under NPM > System Monitor. I then clicked on Alerts and then "Configure Basic Alerts". This only leads me to more questions though... I'm going to do some more research...
Use the Advanced Alerts. Solarwinds>Alerting,Reporting, and Mapping>Advanced Alerts. It should be fairly simple to create this alert, or change the one already running. What version of NPM are you on?