Hi,I have taken the liberty of modifying a saved dat file so as to have heavy thunderstorms along my entire route (KPHX

Hi Glen,Interesting project. The cloud tops altitude is hard coded into AS. It is based on the type of cloud and the conditions surrounding it. As far as I know it is not controlled by anything a user can edit.FYI, one new feature of ASV will be to easily set up weather conditions for a variety of flights. This will be much quicker and easier than the "edit" method you used!Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg

Jim,I am looking forward to ASV. I