I can give you a clue but not the whole solution 
The initial page load is loading the .gif version of the rose e.g. http://www.mohawkvalleyweather.com/ajax-images/wr-SSW.gif, but the subsequent AJAX page updates are loading the .png version of the rose, e.g. http://www.mohawkvalleyweather.com/ajax-images/wr-SSW.png. So, you need to fix the AJAX load to load .gif instead of .png.
