Larry:
Sorry to hear about all the rain at Hallet for CVAR this year. I'm was in the Ozarks, or I would have gone out to watch. I went to watch it last year and there was 6 inches of snow that wiped out Friday and Saturday. A few cars (maybe 30) stayed and were able to get on the track on that Sunday. Here are my notes from last year:
http://clubcobra.com/forums/showthread.php?t=95906
Oklahoma weather in the Spring can be "variable". (Another understatement, from a friend of mine in Calgary: Canadian winters can be "brisk".)