Worldwide Airfield Summary The Worldwide     Airfield     Summary provides climatological data for airfields and geographical areas throughout  the  world.  There  are  10  volumes,  some published in two or more parts. CLIMATOLOGICAL REFERENCES There  are  many  references,  which  can  be  used  in climatological work, so many in fact that they would be too  numerous  to  list  here.  They  are  tabularized  in  the following publications:   Guide    to    Standard    Weather    Summaries (NAVAIR   50-1C-534)   contains   an   index   of   all   the standard machine-tabulated summaries available through FNMOD, Asheville. In   addition,   many   navy   climatic   references   are listed in the Navy Stock List of Forms and Publications, NAVSUP publication 2002, section 2B. Navy climatology publications are found under the NA-SO-1C-series. The  following  publications  can  also  be  used  to prepare climatological briefings and packets:   U.S. Navy Marine Climatic Atlas of the World, volumes 1 through 7 and 9 (NAVAIR 50-1C-528 through   533,   550,   554,   s   and   565).   These publications  contain  climatic  data  for  all  the principal  ocean  areas  of  the  world.  They  have both   land   and   ocean   sections.   The   surface section   contains   data   presented   by   graphs, tables, and isopleths on such elements as surface winds, visibility, precipitation, storm tracks, etc. The  oceanographic  section  includes  charts  of tidal data, currents, and ice.   U.S. Navy Hindcast Spectral Ocean Wave Model Atlases,   volume   1,   North   Atlantic   (NAVAIR 50-1C-538), volume 2, Pacific (NAVAIR 50-1C-539). These atlases represent ocean wave data by tables, bar graphs, and isopleths. Data is based  on  numerically  derived  historical  data  in the  form  of  wind  and  wave  climatology.  These publications  are  designed  to  provide  a  more accurate  representation  of  overall  ocean  wave climatic  data  for  some  applications.  They  are designed  to  supplement  but  not  supersede  the conventional Marine climatic atlases. Local Area Forecaster’s Handbooks The    Local    Area    Forecaster’s    Handbooks,    as required  by  NAVMETOCCOM  Instruction  3140.2(  ), contain valuable information on local and area weather as   follows:   A   description   of   the   local   topography, terrain and general synoptic characteristics of weather occurrences  in  the area.  Mean  storm  tracks  for  the region,  a  limited  amount  of  climatological  data,  and local    forecasting    rules    and    techniques    are    also available.   A   handbook   can   serve   as   a   composite summary of expected weather events and the effects of certain parameters on local weather. 6-15 0 1 2 3 4 5 6 7 8 100 90 80 70 60 50 % 40 30 20 10 0 NE N E   SE S    SW   W   NW    C 0 * 1234 } } Total Cloud Amount Low  Cloud Amount CLOUD  AMOUNT IN  EIGHTHS Cumulative percent frequency of indicated cloud amount equal to or less than the amount intersected by the curve. Number of observations. Obscurations (77% of all total cloud amounts were 7/8.) < < (46% of all low cloud amounts were 2/8.) Low cloud amount:  Percent frequency of observations from each direction and calm that were accompanied by low cloud amounts 5/8 and 7/8. Low clouds are clouds with bases <8000 feet. } } 5/8 ^5/86/8 7/8 & (28% of all SE winds were accompanied by low cloud amounts 5/8 and 14% by low cloud amounts 7/8.) An asterisk indicates that the percentage is based on 10 - 30 obser- vations of wind direction,  total and low cloud amount.  0 replaces bar graph when no low cloud amounts 5/8 were observed with a wind direction or calm.  0 or bar is omitted when number of observations of total and low cloud amount from a wind direction or calm is less than 10. AG5f 0606 Figure 6-6.—Combination bar and line graph (with legend and instructions for use).