TABLE 23 

 Present Weather 

 Conversion from 1936 International Meteorological Organization Code to the 



WMO Code ii501 



Code Underlined 



ABBREVIATED DESCRIPTION OF SKY AKD SPECIAL PHENOMENA 



00 Cloudless 



01 Partly cloudy. 



02 Cloudy. 



03 Overcast. 



OU Low fog, on ground or over sea. 



05 Haze (but visibilitj- greater than 2,000 m., 2,200 yds). 



06 Dust devils seen. 



07 Distant lightning. 



08 Light fog or mist (visibility between 1,000 and 2,000 m., 

 1,100 and 2,200 yds). 



09 Fog at a distance, but not at the ship. 



10 Precipitation within sight. 



11 Thunder, without precipitation at the ship. 



12 Dust storm within sight, but not at the ship. 



13 Ugly^ threatening sky. 

 ik Squally weather. 



15 Heavi^ squalls. ) ^^ ^^^^ 3 ^ours 



16 Waterspouts seen. ) 



WMO 

 Code 

 4501 

 (equivalent ) 





 1 

 1 

 2 



h 

 k 

 h 



9 



k 



h 

 6 

 9 

 3 

 9 

 9 

 9 

 9 



other than showers 



PRECIPITATION IN LAST HOUR BUT NOT AT TIME OF OBSERVATION 



20 Precipitation (rain, drizzle, hail, snow, or sleet) 



21 Drizzle 



22 Rain 



23 Snow 

 2k Rain and snow or sleet , 



25 Rain shower (s). 



26 Snow shower (s). 



27 Hail or rain and hail shower (s). 



28 Slight thunder stomi. 



29 Heavy thunderstorm. 



in last hour 

 but not at 

 time of 

 observation. 



5 

 6 



7 

 7 

 8 



7 

 9 

 9 

 9 



66 



