The vast amounts of user-generated content on the Web produce information overload as frequently as they provide enlightenment. Twitter Weather reduces large quantities of text into meaningful data by gauging its emotional content. This Website visualizes the prevailing mood about top Twitter topics by rendering a weather-report-style display. Comment Weather is its counterpart for article comments, allowing users to gauge sentiment without leaving the page. Supporting Twitter Weather is a user-trained Web service that aggregates and visualizes attitudes on a topic.