Yes, "Tronc" was a huge step down for the once-famous Chicago Tribune. I wrote in to their "Colonel Tribune" columnist, and got back a rather sad reply.

The National Weather Service has an API endpoint [1] which returns weather forecasts in XML. Put in a latitude and longitude, and it calculates a forecast for that location. The data is returned in a structured format. This is the underlying data for most weather sites. One XML item is <wordedForecast>, which looks like this:

    WEATHER FORECAST FOR 2 MILES SE SAN JOSE INTERNATIONAL AIRPORT
    CA ON JULY 11TH AT 2:34 AM.
    TODAY, JULY 11TH: SUNNY, WITH A HIGH NEAR 81. NORTHWEST WIND 6
    TO 16 MPH, WITH GUSTS AS HIGH AS 21 MPH.
    TONIGHT, JULY 11TH: MOSTLY CLEAR, WITH A LOW AROUND 55. NORTH
    WIND 16 TO 21 MPH DECREASING TO 7 TO 12 MPH AFTER MIDNIGHT.
    WINDS COULD GUST AS HIGH AS 26 MPH.

That's what you hear in broadcast radio weather broadcasts.

[1] http://forecast.weather.gov/MapClick.php?lat=%1.4f&lon=%1.4f... (fill in lat and lon).