Usage Notes:
  To force a data source use plot_soundings.php?source=xx
           where xx is:
                    uw = University of Wisconsin
                unisys = Unisys
                   cod = College of DuPage
            local file = a local file whos name is specified by &name=filename.ext



Fatal error:  Uncaught TypeError: Unsupported operand types: string + float in /home1/wxnorthw/public_html/weather/soundings/plot_soundings.php:1075
Stack trace:
#0 /home1/wxnorthw/public_html/weather/soundings/plot_soundings.php(235): yonker_height(Array)
#1 {main}
  thrown in /home1/wxnorthw/public_html/weather/soundings/plot_soundings.php on line 1075