Weather Code Weather according to WMO Code 4501. 



Code Code 



Clear 5 Drizzle 



1 Partly cloudy 6 Rain 



2 Cont. layers of 7 Snow and rain 

 clouds and snow mixed 



3 Blowing!: snow, 8 Shower (s) 

 sandstorm, etc. 9 Thunder- 



4 Fog, haze, dust storm (s) 



Cloud Code 



Type Cloud type according to WMO Code 0500. 



Code Type Code Type 



Cirrus 5 Ninibostratus 



1 Cirrocunmlus 6 Stratocumulus 



2 Cirrostratus 7 Stratus 



3 Altocumulus 8 Cumulus 



4 Altostratus 9 Cumulonimbus 



X Clouds not visible due to darkness, fog, or other analogous phenomena 



Amount Cloud amount in eighths. Entry of the numeral 9 



indicates cloud amount could not be estimated. 



Wind 



Dir. Rounded to nearest multiple of 10 degrees. 



Speed Wind speed in knots. 



Barometer Barometric pi-essure given in tens, units, and tenths 



of millibars. 



Vis. Code Visibility according to WMO Code 4300. 



Code Visibility Code Visibility 



Less than 50m 5 2-4km 



1 50-200m 6 4-lOkm 



2 200-500m 7 10-20km 



3 500-lOOOm 8 20-50km 



4 l-2km 9 50km or more 



Dyn. Ht. Dynamic height in dynamic meters with respect to 



1000 decibar reference surface. 

 Messenger time Entered in hours and tenths of an hour. Indicates 



the starting time for lowering the STD sensor. 



Depth Depth to nearest meter. 



Temp. Temperature to hundredths of a degree Celsius. 



Sal. Salinity to hundredths of a part per thousand. 



Sig-t Sigma-t value. 



79 



