SAN FRANCISCO, CA -- 06/16/08 -- Weather Underground, the nation's first online weather service, today announced the availability of a new online product on its web site, www.wunderground.com, that displays flood alerts for rivers across the United States.

Using data from the USGS (the US Geological Survey), the product plots river data and forecasts on top of an interactive map. Users can scroll across the country and zoom in and out to view in-depth observations from all major rivers in the US. Alternatively, one can click an option to view only the rivers with current flood alerts.

Each river observation is color coordinated to reflect its dry/wet percentile and users can click on each observation point to view data and graphs that display Flow Rate, Percentile, Current Stage, Forecast Stage and Flood Stage. Flood Alert symbols will appear on every river icon whenever a river is in danger of flooding.

Users can go straight to the product via the url www.wunderground.com/wundermap/rivers. Alternatively, one can navigate to it from the homepage by clicking on the WunderMap(TM) and selecting the USGS layer.

"We have created this product to help communities in the US threatened by flooding," said Alan Steremberg, President and co-founder of Weather Underground. "People will easily be able to find the data they need to assess the threat to their homes and businesses. We have brought the product to market as quickly as possible in light of the many flood alerts currently in place in the middle of the country."

This product is a new layer that has been added as a further option to Weather Underground's WunderMap(TM), the most user-friendly and interactive weather map on the Web. The WunderMap(TM) is a visual display of weather layers that are plotted and overlaid on a map interface. Users can choose from a variety of layers including current conditions, animated radar, severe weather and tornado warnings, live webcam images and animated infrared or visible satellite imagery showing cloud coverage.

About Weather Underground

The nation's first online weather service, Weather Underground is committed to delivering the most comprehensive, reliable weather information possible. The company's state-of-the-art technology monitors conditions and forecasts for locations across the world. With thousands of international users contributing local observations from personal weather stations, Weather Underground is able to provide up-to-the-minute weather conditions for the most finely targeted areas. In addition to serving free online weather information to millions of Web users, Weather Underground delivers custom-designed weather page solutions to an array of businesses and media clients -- both online and in print.