That was the model overview from BUFKIT, the NWS' WDTB model visualization tool. You download model files for the major models (NGM, ETA, ETAM, GFS3) and this tool produces lots of weather visualizations of the model data. In the overview you see:
Heavy blue line - read on the left side scale, visibility
Heavy green line - apparent temp, at the surface for the station selected (in this case, KORH)
Heavy white veritcal line - current date/time on the chart (since the models can be up to 6-8 hours old)
White / Grey / Slashed boxes - cloud cover, and I forget how to read the cloud type. Thickness is on the right side, the left-most scale of the 3.
Light colored contour lines - Temperature at altitude.
Green bars - Precipitation (in this case, rain), read from the right side, middle key.
Graph is read from right to left. I've found that using this tool is priceless - compare the major models (short term - RUC, NGM; long term ETA and GFS) and figure out what I think the weather is going to. It's not exact, I'm not always right, but this gives you a level of detail in such a beautiful fashion that it really gives a lot of insight into how the weather is going to evolve. A good FSS briefing, a visit to ADDS, and this tool are about as valuable to flight planning as one could possibly get.
And your tax dollars paid for this tool (to be used by the National Weather Service), and the NWS is giving it back to the public. How novel.
http://www.wdtb.noaa.gov/tools/BUFKIT/index.html
Cheers,
-Andrew