Current observations are for the nearest airport. The point forecast uses that airport and a ring of airports that will surround your location and they "interpolate" from the forecasts at those airports. They do not include results from personal weather stations.
________________________________ From: "c...@traditio.com" <c...@traditio.com> To: U.S. Metric Association <usma@colostate.edu> Sent: Wed, March 13, 2013 2:06:37 PM Subject: [USMA:52514] Re: Weather Forecasts Jim (Frysinger): I don't know about that "point" forecasting by the NWS. When I input my ZIP code, I got figures for an airport in a different city, at least 5 km away. Weather Underground, on the other hand, reports data for five locations in my actual city, all of which are closer to the airport, one of which is only 1 km away. Martin Morrison Metric Training & Eductional Columnist USMA's "Metric Today"