The Effect of Shade, 9-10 March 2004.

 - Clouds shaded the weather station briefly on an otherwise bright sunny day.
 - The associated pattern of heating and cooling is oscillatory
 - There was a strong advective cooling event that occured later in the 
   afternoon that had nothing to do with the clouds (you can see the signal
   most clearly in the temperature plot and the wind direction plot).
 - One of the most interesting features of the Solar Intensity figures is the
   amplification of the forcing by clouds nearby which are not blocking
   the sun.  These clouds must be re-reflecting the radiation back onto the
   sensor (and us).