In order for the iControl radar to remember your custom locations (you can enter and save multiple ones), you need to have cookies enabled in your browser and you need to be logged in as a registered WRAL.com user. This will preserve your locations. Registration also allows you to get free email alerts and newsletters, post classifieds for free, add events to our calendar and comment on stories.
You can register here: http://www.wral.com/rs/page/2173159/?s=registration
Once registered, there is a login link next to the search box at the top of every page of the site.