The problem is the image on the web server could change and the browser will display the cached image instead. To update the image, hit the Reload button on the browser. Sometimes Netscape doesn't reload even when the reload button is hit. Try shift-Reload in these cases. The process is very automated but in some remote cases, data won't get updated or the script runs just as new data is coming in.
Timing can be critical.
Check again in a few minutes or an hour and see if the images have updated. If this persists, notify me. Even though the GIF generation process is highly automated, we have to rely on timely receipt of data from the National Weather Service. From time to time, data is not delivered on time or is incomplete. The GIF generator will not update the images in those cases.