TABLE 24 

 Present Weather 

 Conversion from 1936 International Meteorological Organization Code to the 



WMO Code 4501 



Code Underlined WMO 



Code 



ABBREVIATED DESCRIPTION OF SKY AKD SPECIAL PHENOMENA 4501 



(modified) 



GO Cloudless 



01 Partly cloudy. 1 



02 Cloudy. 1 



03 Overcast. 2 



04 Low fog, on ground or over sea. k 



05 Haze (but visibility greater than 2,000 m., 2,200 y<ls) . k 



06 Dust devils seen. 4 



07 Distant lightning. 9 



08 Light fog or mist (visibility between 1,000 and 2,000 m., 4 

 1,100 and 2,200 yds). 



09 Fog at a distance, but not at the ship. 4 



10 Precipitation within sight. 6 



11 Thunder, without precipitation at the ship. 9 



12 Dust storm within sight, but not at the ship. 3 



13 Ugly, threatening sky. 9 



14 Squally weather. 9 



15 Heavy squalls, ) ^^ ^^^^ 3 ^^^^^ 9 



16 Waterspouts seen. ) 9 



PRECIPITATION IN LAST HOUR BUT NOT AT TIME OF OBSERVATION 



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



21 Drizzle \ I 5 



22 Rain ( ^-u ^v i, I 6 

 ^_ _, > other than showers / . -, ^ i. ^ 



23 Snow I I i.n last hour J 



24 Rain and snow or sleet / I but not at 7 



25 Rain shower (s). /time of 8 



26 Snow shower (s). I observation. 7 



27 Hail or rain and hail shower (s). I 9 



28 Slight thunderstorm. I 9 



29 HeaAry thunderstorm. / 9 



60 



