I suggest creating a Cron so the NOAA Doppler image is copied every 5 minutes to your server. That way your forum list will load faster. This Cron would be created on your server.
Example of a PHP file you would call from your servers Cron.
<?php // define dopplerUrl $dopplerUrl = 'http://radar.weather.gov/lite/N0R/MUX_loop.gif'; // define dopplerPath $dopplerPath = '/home/southbay/www/misc/doppler.gif'; // copy remote image to server copy($dopplerUrl, $dopplerPath);