                                 NOTE


     A large number of total cloud cover and opaque cloud cover values have
been filled for this station using ceiling height as a determinant.  This
procedure was automated following a pre-defined scheme:


      If opaque cloud cover is missing, then total cloud cover is used.
      If total cloud cover is also missing, then a "0" is used for opaque
      cloud cover if the ceiling is greater than 7000 feet (high level
      clouds are generally not opaque), and "7" if the ceiling is less
      than or equal to 7000 feet.  If the opaque cloud cover, total cloud
      cover, and ceiling are all missing, values of ceiling and opaque (or
      total) cloud cover from the preceding hour are used, provided that
      values from both the preceding and the succeeding hours are present
      (i.e. only a single hour is missing).


     For additional information concerning the fill-in methods for the surface
and mixing height meteorological data on the SCRAM BBS, refer to the
"Procedures for Substituting Values for Missing NWS Meteorological Data for
Use in Regulatory Air Quality Models," by Dennis Atkinson and Russell F. Lee.
This protocol is located on the SCRAM BBS in the Meteorological Data area.

