This might be the most common type of aerosol delivery that I've observed in 2008.  It's very stealthy.  You barely notice a chemtrail and then soon the sky is partly overcast with aerosol clouds or is completely covered by a white-out.

1:35 PM

1:49 PM

1:51 PM

2:28 PM  White-out

6:24 PM

6:30 PM  White-out

12:08 PM

12:09 PM