Station Observation Symbols

	Visibility reduced by smoke		Visibility reduced by haze		Widespread dust in suspension in the air, NOT raised by wind
	Dust or sand raised by wind		Well developed dust devils		Dust storm or sand storm within site or at station at time of observation
	Light fog		Patches of shallow fog at station, not deeper than 6 foot on land		More or less continuous shallow fog at station, Not deeper than 6 ft
	Lightning visible, no thunder heard		Precipitation within sight, but not reaching the ground		Precipitation within sight, reaching the ground, but distant from station
	Precipitation within sight, reaching the ground, near but not at station		Thunder heard, but not precipitation at station		Squalls within sight during past hour
	Funnel cloud(s) within sigh during past hour		Drizzle (NOT freezing and Not falling as showers) during past hour, but NOT at time of observation		Rain (NOT freezing and NOT falling as showers) during past hour, but NOT at time of observation
	Snow (NOT falling as showers) during past hour, but not at time of observation		Rain and snow (NOT falling as showers) during past hour, but NOT at time of observation		Freezing drizzle or freezing rain (NOT falling as showers) during past hour, but NOT at time of observation
	Showers of rain during past hour, but NOT at time of observation		Showers of snow, or of rain and snow, during past hour, but not at time of observation		Showers of hail, or of hail and rain, during past hour, but NOT at time of observation
	Fog during past hour, but NOT at time of observation		Thunderstorm (with or without precipitation) during past hour, but NOT at time of observation		Slight or moderate dust storm or sand storm, has decreased during past hour
	Slight or moderate dust storm or sand storm, no appreciable change during past hour		Slight or moderate dust storm or sand storm, has increased during past hour		Severe dust or sand storm, has decreased during past hour
	Severe dust storm or sand storm, no appreciable change during past hour		Severe dust storm or sand storm, has increased during past hour		Slight or moderate drifting snow, generally slow
	Heavy drifting snow, generally low		Slight or moderate drifting snow, generally high		Heavy drifting snow, generally high
	Fog at distance at time of observation		Fog in patches		Fog, sky discernible, has become thinner during past hour
	Fog, sky NOT discernable, has become thinner during past hour		Fog, sky discernible, no appreciable change during past hour		Fog, sky NOT discernible, no appreciable change during past hour
	Fog, sky discernable, has begun or become thicker during past hour		Fog, sky NOT discernible, has begun or become thicker during the past hour		Fog, depositing rime, sky discernible
	Fog, depositing rime, sky NOR discernible		Intermittent drizzle (NOT freezing), slight at time of observation
	Intermittent drizzle (NOT freezing), moderate at time of observation		Continuous drizzle (NOT freezing), moderate at time of observation		Intermittent drizzle (NOT freezing), thick at time of observation
	Continuous drizzle (NOT freezing), thick at time of observation		Slight freezing drizzle		Moderate or thick freezing drizzle
	Drizzle and rain, slight		Drizzle and rain, moderate or heavy		Intermittent rain (NOT freezing), slight at time of observation
	Continuous rain (NOT freezing), slight at time of observation		Intermittent rain (NOT freezing), moderate at time of observation		Continuous rain (NOT freezing), moderate at time of observation
	Intermittent rain (NOT freezing), heavy at time of observation		Continuous rain (NOT freezing), heavy at time of observation		Slight freezing rain
	Moderate or heavy freezing rain		Rain or drizzle and snow, slight		Rain or drizzle and snow, moderate or heavy
	Intermittent fall of snow flakes, slight at time of observation		Continuous fall of snow flakes, slight at time of observation		Intermittent fall of snow flakes, moderate at time of observation
	Continuous fall of snow flakes, moderate at time of observation		Intermittent fall of snow flakes, heavy at time of observation		Continuous fall of snow flakes, heavy at time of observation
	Ice needles (with or without fog)		Granular snow (with or without fog)		Isolated star like snow crystals
	Ice pellets (sleet)		Slight rain showers		Moderate or heavy rain showers
	Violent rain showers		Slight showers(s) of rain and snow mixed		Moderate or heavy showers of rain and snow mixed
	Slight snow showers		Moderate or heavy snow showers		Slight showers of soft or small hail with or without rain, or rain and snow mixed
	Moderate or heavy showers of soft or small hail, with or without rain or rain and snow mixed		Slight showers of hail, with or without rain, or rain and snow mixed, not associated with thunder		Moderate or heavy showers of hail, with or without rain or rain and snow mixed, not associated with thunder
	Slight rain at time of observation, thunderstorm during past hour, but NOT at time of observation		Moderate or heavy rain at time of observation, thunderstorm during past hour, but NOT at time of observation		Slight snow or rain and snow mixed or hail at time of observation; thunderstorm during past hour, but NOT at time of observation
	Moderate or heavy snow, or rain and snow mixed, or hail at time of observation; thunderstorm during past hour, but NOT at time of observation		Slight or moderate thunderstorm without hail, but with rain and/or snow at time of observation		Slight or moderate thunderstorm with hail at time of observation
	Heavy thunderstorm, without hail, but with rain and/or snow at time of observation		Thunderstorm, combined with dust storm or sand storm at time of observation		Heavy thunderstorm with hail at time of observation