TABIiE 25 

 Present Weather 

 WMO Code hSjJ for recording present weather 



(0 



>- o 



O 4^ 0) 



o E 

 X o 



o 



Code figure 



WW 



00 



"S 

 E 



Q. 



0) 

 O 



E 



(0 



■o 



c 



CO 



(O 



I 



01 



02 

 03 

 04 



05 

 06 



07 



08 



09 



10 

 11 



12 



13 



14 

 15 



16 



17 

 18 

 19 



characteristic change 

 of the state of sky 

 during the past hour 



Cloud development not observed or not 



observable 



Clouds generally dissolving or becoming less 



developed 



State of sky on the whole unchanged 



Clouds generally forming or developing 



Visibility reduced by smoke, e.g. veldt or forest fires, industrial smoke 

 or volcanic ashes 



Haze 



Widespread dust in suspension in the air, not raised by wind at or near 



the station at the time of observation 



Dust or sand raised by wind at or near the station at the time of observa- 

 tion, but no well developed dust whirl(s) or sand whirl(s), and no dust- 

 storm or sandstorm seen 



Well developed dust whirl(s) or sand whirl(s) seen at or near the station 

 during the preceding hour or at the time of observation, but no duststorm 

 or sandstorm 



Duststorm or sandstorm within sight at the time of observation, or at the 

 station during the preceding hour 



Mist 



Patches of | shallow fog or ice fog at the station, whether on land or 

 > sea, not deeper than about 2 metres on land or 10 metres 

 at sea 



More or less 



I continuous 



Lightning visible, no thunder heard 



Precipitation within sight, not reaching the ground or the surface of the sea 



Precipitation within sight, reaching the ground or the surface of the sea, 

 but distant (i. e. estimated to be more than 5 km) from the station 



Precipitation within sight, reaching the ground or the surface of the sea, 

 near to, but not at the station 



Thunderstorm, but no precipitation at the time of observation 



Squalls 1^ at or within sight of the station during the preceding 



Funnel cloud(s) ** | hour or at the time of observation 



* The expression "at the station" refers to a land station or a ship. 

 •• Tornado cloud or waterspout. 



64 



