Rood wrote blogs on climate change and societal response, with new entries on a weekly basis. Jeff Masters started the first blog on April 14, 2005, and he posts blog entries nearly every day. Web logs ( blogs) were one of the main features in Weather Underground, allowing users of the site to create blogs about weather, everyday life and anything else. On October 3, 2019, Jeff Masters announced that he would be leaving Weather Underground. The deal was finalized on January 29, 2016. The Weather Channel television service remained a separate entity, later sold to Entertainment Studios in 2018. On October 28, 2015, Jeff Masters noted that IBM had officially announced an agreement to acquire The Weather Company business-to-business, mobile and cloud-based Web properties, including Weather Underground, WSI,, and also the Weather Company brand. ET, except during storm coverage in which case the show is extended to 9 p.m. The site popularity also helped launch a television show hosted by meteorologist Mike Bettes, which airs on The Weather Channel from 5 p.m. The Weather Company also uses the site's San Francisco headquarters as a regional office. SimilarWeb rates the site as the second most visited weather website globally, attracting more than 47 million visitors per month.

Third-party Web analytics providers Alexa and SimilarWeb rate the site as the 117th and 98th most-visited site in the United States, respectively, as of July 2015. The Weather Underground Web site continues to operate as a separate entity from The Weather Channel primary site,, with its existing staff retained. On July 2, 2012, The Weather Channel announced that it would acquire Weather Underground, which would become operated as part of The Weather Channel Companies, LLC, which was later renamed 'The Weather Company'. In February 2010, Weather Underground launched, a full screen weather Web tool with integrated mapping and mobile device use in mind. 2 for Internet weather information in 2008. In October 2008, Jeff Masters reported that the site was No. Alan Steremberg also worked on the early development of the Google search engine with Larry Page and Sergey Brin.

In 2005, Weather Underground became the weather provider for the Associated Press Weather Underground also provides weather reports for some newspapers, including the San Francisco Chronicle and the Google search engine. It has grown to provide weather for print sources, in addition to its online presence. became a commercial entity separate from the university.

The original logo, used from 1997 through 2014

Internet weather display