Since MB Pro doesn't generate a forecast, the
davconvueCW.php and
davconvp2CW.php show the three bars indicated by the "grid.png" file. This is the intent of the script when the forecast is missing. I always thought it resembled the "fog" icon on weather station circles.
I decided that I would rather have "nothing" than this icon showing. After some experimentation, I created a 100% transparent icon using one of those favicon generators online. I then saved this favicon as grid.png and uploaded to my web server. It is working as I want it, there is no icon showing on the virtual console displays.
You can see it at
http://rogerscityweather.com/davconvp2CW.php and
http://rogerscityweather.com/davconvueCW.php. I'll attach my modified grid.png file so if you want to use it, you don't have to generate your own.
Greg H.