[slight at time of observation. 



>moder; 



[heavy (dense) 



at time of observation. 



>moderate at time of observation. 



TABLES 



41 Fog or ice fog in patches. 



42 Fog or ice fog, sky discernible \has become thinner during the preced- 



43 Fog or ice fog, sky not discernible/ ing hour. 



44 Fog or ice fog, sky discernible \no appreciable change during the pre- 



45 Fog or ice fog, sky not discernible/ ceding hour. 



46 Fog or ice fog, sky discernible Ihas begun or has become thicker during 



47 Fog or ice fog, sky not discernible/ the preceding hour. 



48 Fog, depositing rime, sky discernible. 



49 Fog, depositing rime, sky not discernible. 



lio-59 precipitation at the station (or ship) at the time of observation 



Drizzle at time of observation 



Drizzle, not freezing, intermittent 



Drizzle, not freezing, continuous 



Drizzle, not freezing, intermittent! , .„.„ „. ,•„„ „, „. „ „i. 



T-, • 1 if • ,■ >moderate at time of observation 



Drizzle, not freezing, continuous J 



Drizzle, not freezing, intermittent!,. Mense! at time of observation 



Drizzle, not freezing, continuous ^^eavy (aense) at time ol observation 



Drizzle, freezing, slight. 



Drizzle, freezing, moderate or heavy (dense). 



Drizzle and rain, slight. 



Drizzle and rain, moderate or heavy. 



Rain at time of observation. 



Rain, not freezing, intermittent! ,;j^ ; ^ observation. 



Rain, not freezing, continuous / ° 



Rain, not freezing, intermittent^ , , . .. , ohsprvation 



Rain, not freezing, continuous /moderate at time ot observation. 



Rain, not freezing, intermittent! j^ ^ observation. 



Rain, not freezing, continuous J 



Rain, freezing, slight. 



Rain, freezing, moderate or heavy. 



Rain or drizzle and snow, slight. 



Rain or drizzle and snow, moderate or heavy. 



Solid precipitation not in showers at time of observation. 



Intermittent fall of snowflakes! .. ■ . 



Continuous fall of snowflakes / ° 



Intermittent fall of snowflakes! 



Continuous fall of snowflakes / 



Intermittent fall of snowflakesjj^ . ^ observation. 



Continuous fall of snowflakes / ^ 



Ice prisms (with or without fog). 



Snow grains (with or without fog). 



Isolated starlike snow crystals (with or without fog). 



Ice pellets (i.e., frozen raindrops or largely melted and refrozen snow- 

 flakes). 



Showery precipitation, or precipitation with current or recent 

 thunderstorm. 



Rain shower(s), slight. 



Rain shower (s), moderate or heavy. 



Rain shower(s), violent. 



Shower(s) of rain and snow mixed, slight. 



Shower(s) of rain and snow mixed, moderate or heavy. 



Snow shower(s), slight. 



Snow shower(s), moderate or heavy. 



Shower(s) of snow pellets or ice pellets* with or without rain or! i- . . 

 rain and snow mixed / ^ 



Shower(s) of snow pellets or ice pellets* with or with-! jj^gj.j^jg ^^ heavy 

 out rain or rain and snow mixed / ■' " 



Shower(s) of hail with or without rain or rain and snow '"'"Bd,! .• ■ . 

 not associated with thunder / ^ ' 



Shower(s) of hail with or without rain or rain and! ^ j^ 



snow mixed, not associated with thunder J •' 



Slight rain at time of observation ^ 



Moderate or heavy rain at time of observation thunderstorm during the 



Shght snow or rain and snow mixed or hail* ^^.^jing hour but not 



at time of observation ^^ ^.^^ »f observation 



Moderate or heavy snow, or rain and snow 

 mixed or hail* at time of observation I 



Thunderstorm, slight or moderate, without hail*^ 

 but with rain and/or snow at time of observation 



Thunderstorm, slight or moderate, with hail* at 

 time of observation 



Thunderstorm, heavy, without hail* but with rain 

 and/or snow at time of observation 



Thunderstorm combined with duststorm or sand- 

 storm — at time of observation 



Thunderstorm, heavy, with hail * at time of observation, 



105 



50-59: 

 50 

 51 

 52 

 53 

 54 

 55 

 56 

 57 

 58 

 59 



60-69: 

 60 

 61 

 62 

 63 

 64 

 65 

 66 

 67 

 68 

 69 



70-79: 

 70 

 71 

 72 

 73 

 74 

 75 

 76 

 77 

 78 

 79 



80-99: 



80 

 81 

 82 

 83 

 84 

 85 

 86 

 87 



88 



89 



90 



91 

 92 

 93 



94 



95 



96 



97 



**98 



99 



thunderstorm at time 

 of observation. 



•nail, ice pellets, i.e., pellets of snow encased in a thin layer of ice: snow pellets. 



••In reporting code figure 98, the observer is allowed considerable latitude in the presumption that pre- 

 cipitation is or Is not occurring if it is not actually visible. 



