U.S. forecasts and advisories on the wunderground.com web site are generated by the National Weather Service (NWS). The NWS transmits the data to a satellite data feed called NOAAPORT insuring rapid delivery of NWS information within seconds of when it is sent out. The Weather Underground\'s maintains a NOAAPORT satellite dish that continually collects NWS information. The NWS issues forecasts specific for every county in the U.S. two to four times per day, or more often when conditions warrant.