This is a mostly functional tool for plotting weather data from Penacook NH. One data set has the weather snapshots taken every 10 minutes, the other has a summary of data for each day. You can select several things to plot together, however, the system only does a limited job of making sensible plots. Each variable is a member of a class, e.g. temperature and dew points are both temperatures and it makes sense to plot them with the same scale. Likewise, rain and snow depth are both measured in inches, but they don't go together nearly as well. Barometric pressure is also in inches (of mercury) but its small range makes it just plain silly to include with the others. Currently defined classes are inch, percent, pressure, speed, and temperature.

Gnuplot has two yaxis scales. The left axis is used for the class of the first variable plot (e.g. degrees for temperature). The right axis is used for all the rest. The class used is that of the last variable selected. In general, you only want to select variables from two classes.

Select the starting date (year, month, day), the number of days to plot, and the variables you want to see. Clicking submit will send the query to the weather data server which will create the plot and send back a web page that includes it.

Contact Ric Werme or return to his home page.

Last updated 2015 Dec 13.