GEMPAK Symbols, Lines, and Markers N-AWIPS 5.6 User s Guide C-2 (modified) October 2000 WEATHER SYMBOLS 0 - Cloud Development NOT observed or NOT observable during past hour 1 - Clouds generally dissolving or becoming less developed during past hour 2 - State of sky on the whole unchanged during past hour 3 - Clouds generally forming or developing during past hour 4 - Visibility reduced by smoke 5 - Haze 6 - Widespread dust in suspension in the air, NOT raised by wind, at time of obser-vation 7 - Dust or sand raised by wind, at time of observation 8 - Well developed dust devil(s) within past hour 9 - Dust storm or sand storm within sight of or at station during past hour 10 - Light fog 11 - Patches of shallow fog at station, NOT deeper than 6 feet on land 12 - More or less continuous shallow fog at station, NOT deeper than 6 feet on land 13 - Lighting visible, no thunder heard 14 - Precipitation within sight, but NOT reaching the ground 15 - Precipitation within sight, reaching the ground, but distant from station 16 - Precipitation within sight, reaching the ground, near to but NOT at station 17 - Thunder heard, but no precipitation at the station 18 - Squall(s) within sight during past hour 19 - Funnel cloud(s) within sight during past hour 20 - Drizzle (NOT freezing and NOT falling as showers) during past hour, but NOT at time of observations 21 - Rain (NOT freezing and NOT falling as showers) during past hour, but NOT at time of observations 22 - Snow (NOT falling as showers) during past hour, but NOT at time of observa-tion 23 - Rain and snow (NOT falling as showers) during past hour, but NOT at time of observation 24 - Freezing drizzle or freezing rain (NOT falling as showers) during past hour, but NOT at time of obsevation 25 - Showers of rain during past hour, but NOT at time of observation 26 - Showers of snow, or of rain and snow, during past hour, but NOT at time of observation 27 - Showers of hail, or of hail and rain, during past hour, but NOT at time of obser-vation 28 - Fog during past hour, but NOT at time of observation 29 - Thunderstorm (with or without precipitation) during past hour, but NOT at time of observation 30 - Slight or moderate dust storm or sand storm, has decreased during past hour 31 - Slight or moderate dust storm or sand storm, no appreciable change during past hour 32 - Slight or moderate dust storm or sand storm, has increased during past hour 33 - Severe dust storm or sand storm, has decreased during past hour 34 - Severe dust storm or sand storm, no appreciable change during past hour 35 - Severe dust storm or sand storm, has increased during past hour 36 - Slight or moderate drifting snow, generally low 37 - Heavy drifting snow, generally low 38 - Slight or moderate drifting snow, generally high 39 - Heavy drifting snow, generally high 40 - Fog at distance at time of observation, but NOT at station during past hour 41 - Fog in patches 42 - Fog, sky discernible, has become thinner during past hour 43 - Fog, sky NOT discernible, has become thinner during the past hour 44 - Fog, sky discernible, no appreciable change during past hour 45 - Fog, sky NOT discernible, no appreciable change during past hour 46 - Fog, sky discernible, has begun or become thicker during past hour 47 - Fog, sky NOT discernible, has begun or become thicker during past hour 48 - Fog, depositing rime, sky discernible 49 - Fog, depositing rime, sky NOT discernible 50 - Intermittent drizzle (NOT freezing) slight at time of observation 51 - Continuous drizzle (NOT freezing) slight at time of observation 52 - Intermittent drizzle (NOT freezing moderate at time of observation 53 - Continuous drizzle (NOT freezing), moderate at time of observation 54 - Intermittent drizzle (NOT freezing), thick at time of observation 55 - Continuous drizzle (NOT freezing), thick at time of observation 56 - Slight freezing drizzle 57 - Moderate or thick freezing drizzle 58 - Drizzle and rain, slight 59 - Drizzle and rain, moderate or heavy 60 - Intermittent rain (NOT freezing), slight at time of observation 61 - Continuous rain (NOT freezing), slight at time of observation 62 - Intermittent rain (NOT freezing) moderate at time of observation 63 - Continuous drizzle (NOT freezing), moderate at time of observation 64 - Intermittent rain (NOT freezing), heavy at time of observation 65 - Continuous rain (NOT freezing), heavy at time of observation 66 - Slight freezing rain 67 - Moderate or heavy freezing rain 68 - Rain or drizzle and snow, slight 69 - Rain or drizzle and snow, moderate or heavy 70 - Intermittent fall of snowflakes, moderate at time of observation 71 - Continuous fall of snowflakes, slight at time of observation 72 - Intermittent fall of snowflakes, moderate at time of observation 73 - Continuous fall of snowflakes, moderate at time of observation 74 - Intermittent fall of snowflakes, heavy at time of observation 75 - Continuous fall of snowflakes, heavy at time of observation 76 - Ice needles (with or without fog) 77 - Granular snow (with or without fog) 78 - Isolated star like snow crystals (with or without fog) 79 - Ice pellets (sleet, U. S. definition) 80 - Slight rain shower(s) 81 - Moderate or heavy rain showers(s) 82 - Violent rain shower(s) 83 - Slight shower(s) of rain and snow mixed 84 - Moderate or heavy shower(s) of rain and snow mixed 85 - Slight snow shower(s) 86 - Moderate or heavy snow shower(s) 87 - Slight shower(s) of soft or small hail with or without rain, or rain and snow mixed 88 - Moderate or heavy shower(s) of soft or small hail with or without rain, or rain and snow mixed 89 - Slight shower(s) of hail, with or without rain or rain and snow mixed, not asso-ciated with thunder 90 - Moderate or heavy shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder 91 - Slight rain at time of observation; thunderstorm during past hour, but NOT at time of observation 92 - Moderate or heavy rain at time of observation; thunderstorm during past hour, but NOT at time of observation 93 - Slight snow or rain and snow mixed or hail at time of observation; thunder-storm during past hour, but not at time observation 94 - 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 95 - Slight or moderate thunderstorm without hail, but with rain and/or snow at time of observation 96 - Slight or moderate thunderstorm, with hail at time of observation 97 - Heavy thunderstorm., without hail, but with rain and/or snow at time of obser-vation 98 - Thunderstorm combined with dust storm or sand storm at time of observation 99 - Heavy thunderstorm with hail at time of observation 201 - Volcanic ash 202 - Blowing spray 203 - Unknown precipitation from an automatic station