Legend. temperature (°C), dewpoint (°C), mean sea level pressure (hPa), circle=amount of cloud in okta, arrow=wind direction and speed (kt), pressure tendency of last 3 hours (hpa), present weather code, wind gust in knots, symbols=cloud type, black lines=surface isobar each 4 hPa, red dashed lines=geopotential height at 500 hPa each 6 dam, H=center of high, L=center of low.   amount of cloud in okta   pressure tendency of last 3 hours (hpa) The two-digit figure is amount of change of pressure, expressed as tenths of hPa:  +8   = 0,8 hPa change in pressure over previous 3 hours (rising) -9    = 0,9 hPa change in pressure over previous 3 hours (dropping) +71 = 7,1 hPa change in pressure over previous 3 hours (rising) -82  = 8,2 hPa change in pressure over previous 3 hours (dropping)   present weather code 0 Cloud development not observed or not observable during past hour (not plotted) 1 Clouds generally dissolving or becoming less developed during past hour (not plotted) 2 State of sky on the whole unchanged during past hour (not plotted) 3 Clouds generally forming or developing during past hour (not plotted). 4 Smoke reducing visibility 5 Haze 6 Widespread dust in suspension in the air, not raised by wind at or near the station at the time of observation 7 Dust or sand raised by the wind at or near the station at the time of the observation, but no well-developed dust whirl(s), and no sandstorm seen: or, in the case of ships, blowing spray at the station 8 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 9 Duststorm or sandstorm within sight at the time of observation, or at the station during the preceding hour 10 Mist 11 Patches of shallow fog at station, not deeper than 2 meter (6 feet) on land 12 More or less continuous shallow fog at station, not deeper than 2 meter (6 feet) on land 13 Lighting visible, no thunder heard 14 Precipitation within sight, but not reaching the ground 15 Precipitation within sight, reaching ground or the surface of the sea, but distant, i.e. estimated to be more than 5 km (3 miles) from the station 16 Precipitation within sight, reaching the ground or the surface of the sea, near to (within 5 km or 3 miles), but not at the station 17 Thunder heard, but no precipitation at the station 18 Squall(s) within sight during past hour 19 Funnel cloud(s) / Tornado(s) during the preceding hour or at time of observation 20 Drizzle (not freezing) or snow grains not falling as shower(s) ended in the past hour 21 Rain (not freezing) not falling as shower(s) ended in the past hour 22 Snow not falling as shower(s) ended in the past hour 23 Rain and snow or ice pellets not falling as shower(s) ended in the past hour 24 Freezing drizzle or freezing rain not falling as shower(s) ended in the past hour 25 Shower(s) of rain ended in the past hour 26 Shower(s) of snow, or of rain and snow ended in the past hour 27 Shower(s) of hail, or of rain and hail ended in the past hour 28 Fog or ice fog ended in the past hour 29 Thunderstorm (with or without precipitation) ended in the past hour 30 Slight or moderate duststorm or sandstorm (has decreased during the preceding hour) 31 Slight or moderate duststorm or sandstorm (no appreciable change during the preceding hour) 32 Slight or moderate duststorm or sandstorm (has begun or increased during the preceding hour) 33 Severe duststorm or sandstorm has decreased during the preceding hour 34 Severe duststorm or sandstorm has no appreciable change during the preceding hour 35 Severe duststorm or sandstorm has begun or increased during the preceding hour 36 Slight or moderate drifting snow (generally below eye level) 37 Heavy drifting snow (generally below eye level) 38 Slight or moderate blowing snow (generally above eye level) 39 Heavy drifting snow (generally above eye level) 40 Fog at a distance at the time of observation, but not at the station during the preceding hour, the fog or ice fog extending to a level above that of the observer 41 Fog in patches 42 Fog sky visible (has become thinner during preceding hour) 43 Fog sky obscured (has become thinner during preceding hour) 44 Fog sky visible (no appreciable change during the preceding hour) 45 Fog sky obscured (no appreciable change during the preceding hour) 46 Fog sky visible (has begun or has become thicker during the preceding hour) 47 Fog sky obscured (has begun or has become thicker during the preceding hour) 48 Fog, depositing rime ice, sky visible 49 Fog, depositing rime ice, or ice fog, sky obscured 50 Drizzle, not freezing, intermittent (slight at time of observation) 51 Drizzle, not freezing, continuous (slight at time of observation) 52 Drizzle, not freezing, intermittent (moderate at time of observation) 53 Drizzle, not freezing, continuous (moderate at time of observation) 54 Drizzle, not freezing, intermittent (heavy at time of observation) 55 Drizzle, not freezing, continuous (heavy at time of observation) 56 Drizzle, freezing, slight 57 Drizzle, freezing, moderate or heavy 58 Drizzle and rain, slight 59 Drizzle and rain, moderate or heavy 60 Rain, not freezing, intermittent (slight at time of observation) 61 Rain, not freezing, continuous (slight at time of observation) 62 Rain, not freezing, intermittent (moderate at time of observation) 63 Rain, not freezing, continuous (moderate at time of observation) 64 Rain, not freezing, intermittent (heavy at time of observation) 65 Rain, not freezing, continuous (heavy at time of observation) 66 Rain, freezing, slight 67 Rain, freezing, moderate or heavy 68 Rain or drizzle and snow, slight 69 Rain or drizzle and snow, moderate or heavy 70 Intermittent fall of snowflakes (slight 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 Snow grains (with or without fog) 78 Isolated star-like snow crystals (with or without fog) 79 Ice pellets (sleet) 80 Rain shower(s), slight 81 Rain shower(s), moderate or heavy 82 Rain shower(s), violent 83 Shower(s) of rain and snow mixed, slight 84 Shower(s) of rain and snow mixed, moderate or heavy 85 Snow shower(s), slight 86 Snow shower(s), moderate or heavy 87 Shower(s) of snow pellets or small hail, slight with or without rain or rain and snow mixed 88 Shower(s) of snow pellets or small hail, moderate or heavy with or without rain or rain and snow mixed 89 Shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder, slight 90 Shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder, moderate or heavy 91 Thunderstorm during the preceding hour but not at time of observation with slight rain at time of observation 92 Thunderstorm during the preceding hour but not at time of observation with moderate or heavy rain at time of observation 93 Thunderstorm during the preceding hour but not at time of observation with slight snow, or rain and snow mixed, or hail at time of observation 94 Thunderstorm during the preceding hour but not at time of observation with moderate or heavy snow, or rain and snow mixed, or hail at time of observation 95 Thunderstorm, slight or moderate, without hail but with rain and or snow at time of observation 96 Thunderstorm, slight or moderate, with hail at time of observation 97 Thunderstorm, heavy, without hail but with rain and or snow at time of observation 98 Thunderstorm combined with duststorm or sandstorm at time of observation 99 Thunderstorm, heavy, with hail at time of observation   Back symbols = cloud type (Source legend: WMO Manual)

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