Table 11. Distribution of Reports over the Synoptic Reporting Times
________________________________________________________________________________
                              Percent of reports at reporting times (GMT)       
                Total Number  00   03   06   09   12   15   18   21    6-hr 3-hr
LAND
all reports     124,164,607  14.4  9.4 14.6 11.4 15.7 10.3 14.4  9.8   59.1 40.9
light reports    90,348,885  12.6  9.6 17.6 14.7 17.3 10.3 11.3  6.6   58.8 41.2
cloud type rpts  87,982,297  12.6  9.7 17.6 14.6 17.3 10.3 11.3  6.6   58.8 41.2
  (light)

SHIP
all reports      14,721,941  22.7  2.6 22.4  2.8 22.6  2.9 21.7  2.3   89.4 10.6
light reports    11,093,710  22.0  2.2 21.1  3.0 22.9  3.4 23.2  2.2   89.3 10.7
cloud type rpts   9,400,201  22.5  2.1 21.8  2.8 22.8  2.9 23.0  2.1   90.1  9.9
  (light)
________________________________________________________________________________

  





  Table 12. Contribution of the Various Paths to Total Nimbostratus Frequency
  ___________________________________________________________________________
                                        LAND                 OCEAN
                                     88 million           9.4 million
                                 light type reports    light type reports
                                 frequency  percent    frequency  percent
     Path to Ns          ww         Ns,%     of Ns       Ns,%      of Ns
     _______________   _____     _________  _______    _________  _______
     Total                          6.24                  4.90

     CM=2,7            D,R,S        3.59      58          1.60      33

     N=9               D,R,S        0.39       6          0.96      19

     CM=/:                          2.26      36          2.34      48
          CL=7         D,R,S                 (17)*                 (26)     
          CL=0         D,R,S                 ( .1)                 ( .02)
          CL=6           R,S                 ( 5)                  (12)
          CL=4,5,8       R,S                 (14)                  (10)

          Exclusions*:
          CL=4,5,6,8   D           ~0.2                  ~0.6
          CL=1,2,3,9   D,R,S       ~0.08                 ~0.3
  ___________________________________________________________________________
  * Approximate values based on January data: for exclusions and values in
   parentheses.