code_name,Weather condition units,WMO code 4501 (if <=0):WMO code 4677 (if >0)] -9,THUNDERSTORM(S) -8,SHOWER(S) -7,SNOW, OR RAIN AND SNOW MIXED -6,RAIN -5,DRIZZLE -4,FOG, THICK DUST OR HAZE -3,SANDSTORM, DUSTSTORM, OR BLOWING SNOW -2,CONTINUOUS LAYER(S) OF CLOUD(S) -1,PARTLY CLOUDY (SCATTERED OR BROKED) 0,CLEAR (NO CLOUD AT ANY LEVEL) 01,CLOUDS GENERALLY DISSOLVING OF BECOMING LESS DEVELOPED-CHAR. CHANGE OF STATE OF SKY DURING PAST HR. 02,STATE OF SKY ON THE WHOLE UNCHANGED-CHAR. CHANGE OF THE STATE OF SKY DURING THE PAST HOUR 03,CLOUDS GENERALLY FORMING OR DEVELOPING-CHAR. CHANGE OF THE STATE OF SKY DURING THE PAST HOUR 04,VISIBILTY REDUCED BY SMOKE, E.G. VELDT OF FOREST FIRES, INDUSTRIAL SMOKE OR VOLCANIC ASHES 05,HAZE 06,WIDESPREAD DUST IN SUSPENSION IN THE AIR, RAISED BY WIND AT OR NEAR THE STATION AT TIME OF OBS. 07,DUST OR SAND RAISED BY WIND AT OR NEAR THE STATION AT THE TIME OF OBSERVATION, BUT NO WELL DEVELOPED DUST WHIRL(S) OR SAND WHIRL(S), AND NO DUSTSTORM OR SANDSTORM SEEN 08,WELL DEVELOP. DUST WHIRL(S) OR SAND WHIRL(S) SEEN AT OR NEAR STATION DURING THE PRECEDING HOUR OR AT THE TIME OF OBSERVATION, BUT NO DUSTSTORM OR SANDSTORM 09,DUSTSTORM OR SANDSTORM WITHIN SIGHT AT THE TIME OF OBSERVA., OR AT STATION DURING PRECEDING HOUR 10,MIST 11,PATCHES OF SHALLOW FOG OR ICE FOG AT THE STATION, WHETHER ON LAND OR SEA, NOT DEEPER THAN ABOUT 2 METERS ON LAND OR 10 METERS AT SEA 12,MORE OR LESS CONTINUOUS SHALLOW FOG OR ICE FOG AT THE STATION, WHETHER ON LAND OR SEA, NOT DEEPER THAN ABOUT 2 M ON LAND OR 10 M AT SEA 13,LIGHTNING VISIBLE, NO THUNDER HEARD 14,PRECIPITATION WITHIN SIGHT, NOT REACHING THE GROUND OR THE SURFACE OF THE SEA 15,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 16,PREC. WITHIN SIGHT, REACHING GROUND OR SURFACE OF THE SEA, NEAR TO, BUT NOT AT THE STATION 17,THUNDERSTORM, BUT NO PRECIPITATION AT THE TIME OF OBSERVATION 18,SQUALLS AT OR WITHIN SIGHT OF THE STATION DURING THE PRECEDING HOUR OR AT TIME OF OBSERVATION 19,FUNNEL CLOUD(S) AT OR WITHIN SIGHT OF STATION DURING PRECEDING HOUR OR AT THE TIME OF OBSERVATION 20,DRIZZLE (NOT FREEZING) OR SNOW GRAINS - NOT FALLING AS SHOWER(S) 21,RAIN (NOT FREEZING) - NOT FALLING AS SHOWER(S) 22,SNOW - NOT FALLING AS SHOWER(S) 23,RAIN AND SNOW OR ICE PELLETS, TYPE (A) - NOT FALLING AS SHOWER(S) 24,FREEZING DRIZZLE OR FREEZING RAIN - NOT FALLING AS SHOWER(S) 25,SHOWER(S) OF RAIN - NOT FALLING AS SHOWER(S) 26,SHOWER(S) OF SNOW, OR OF RAIN AND SNOW - NOT FALLING AS SHOWER(S) 27,SHOWER(S) OF HAIL, OR OF RAIN AND HAIL - NOT FALLING AS SHOWER(S) 28,FOG OR ICE FOG - NOT FALLING AS SHOWER(S) 29,THUNDERSTORM (WITH OR WITHOUT PRECIPITATION) 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 HAS INCREASED DURING THE PRECEDING HOUR 33,SEVERE DUSTSTORM OR SANDSTORM-HAS DECREASED DURING THE PRECEDING HOUR 34,SEVERE DUSTSTORM OR SANDSTORM-NO APPRECIABLE CHANGE DURING THE PRECEDING HOUR 35,SEVERE DUSTSTORM OR SANDSTORM-HAS BEGUN OR HAS INCREASED DURING THE PRECEDING HOUR 36,SLIGHT OR MODERATE BLOWING SNOW-GENERALLY LOW (BELOW EYE LEVEL) 37,HEAVY DRIFTING SNOW-GENERALLY LOW (BELOW EYE LEVEL) 38,SLIGHT OR MODERATE BLOWING SNOW-GENERALLY HIGH (ABOVE EYE LEVEL) 39,HEAVY BLOWING SNOW-GENERALLY HIGH (ABOVE EYE LEVEL) 40,FOG OR ICE FOG AT A DISTANCE AT 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 OR ICE FOG IN PATCHES 42,FOG OR ICE FOG, SKY VISIBLE-HAS BECOME THINNER DURING THE PRECEDING HOUR 43,FOG OR ICE FOG, SKY INVISIBLE-HAS BECOME THINNER DURING THE PRECEDING HOUR 44,FOG OR ICE FOG, SKY VISIBLE-NO APPRECIABLE CHANGE DURING THE PRECEDING HOUR 45,FOG OR ICE FOG, SKY INVISIBLE-NO APPRECIABLE CHANGE DURING THE PRECEDING HOUR 46,FOG OR ICE FOG, SKY VISIBLE-HAS BEGUN OR HAS BECOME THICKER DURING THE PRECEDING HOUR 47,FOG OR ICE FOG, SKY INVISIBLE-HAS BEGUN OR HAS BECOME THICKER DURING THE PRECEDING HOUR 48,FOG, DEPOSITING RIME, SKY VISIBLE 49,FOG, DEPOSITING RIME, SKY INVISIBLE 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 (DENSE) AT TIME OF OBSERVATION 55,DRIZZLE, NOT FREEZING, CONTINUOUS-HEAVY (DENSE) AT TIME OF OBSERVATION 56,DRIZZLE, FREEZING, SLIGHT 57,DRIZZLE, FREEZING, MODERATE OR HEAVY (DENSE) 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 SNOW FLAKES-SLIGHT AT TIME OF OBSERVATION 71,CONTINUOUS FALL OF SNOW FLAKES-SLIGHT AT TIME OF OBSERVATION 72,INTERMITTENT FALL OF SNOW FLAKES-MODERATE AT TIME OF OBSERVATION 73,CONTINUOUS FALL OF SNOW FLAKES-MODERATE AT TIME OF OBSERVATION 74,INTERMITTENT FALL OF SNOW FLAKES-HEAVY AT TIME OF OBSERVATION 75,CONTINUOUS FALL OF SNOW FLAKES-HEAVY AT TIME OF OBSERVATION 76,ICE PRISMS (WITH OR WIHTOUT FOG) 77,SNOW GRAINS (WITH OF WITHOUT FOG) 78,ISOLATED STARLIKE SNOW CRYSTALS (WITH OR WITHOUT FOG) 79,ICE PELLETS, TYPE (A) 80,RAIN SHOWER(S), SLIGHT 81,RAIN SHOWER(S), MODERATE OR HEAVY 82,RAIN SHOWER(S), VIOLENT 83,SHOWER(S) OF RAIN ANS SNOW MIXED, SLIGHT 84,SHOWER(S) OF RAIN ANS SNOW MIXED, MODERATE OR HEAVY 85,SNOW SHOWER(S), SLIGHT 86,SHOW SHOWER(S), MODERATE OR HEAVY 87,SHOWER(S) OF SNOW PELLETS OR ICE PELLETS, TYPE(B),WITH/WITHOUT RAIN AND SNOW MIXED-SLIGHT 88,SHOWER(S) OF SNOW PELLETS OR ICE PELLETS, TYPE(B), WITH/WITHOUT RAIN OR RAIN AND SNOW MIXED- MODERATE OR HEAVY 89,SHOWER(S) OF HAIL, WITH OR WITHOUT RAIN OR RAIN AND SNOW MIXED, NOT ASSOC. WITH THUNDER-SLIGHT 90,SHOWER(S)OF HAIL, WITH/WITHOUT RAIN OR RAIN AND SNOW MIXED, NOT ASSOC. W/THUNDER-MODERATE OR HEAVY 91,SLIGHT RAIN AT TIME OF OBSERVATION-THUNDERSTORM DURING THE PRECEDING HOUR BUT NOT AT TIME OF OBS. 92,MODERATE OR HEAVY RAIN AT TIME OF OBSER.-THUNDERSTORM DURING PRECEDING HR. BUT NOT AT TIME OF OBS. 93,SLIGHT SNOW, OR RAIN AND SNOW MIXED OR HAIL AT TIME OF OBSER.-THUNDER STORM DURING THE PRECEDING HOUR BUT NOT AT TIME OF OBSERVATION 94,MODERATE OR HEAVY SNOW, OR RAIN AND SNOW MIXED OR HAIL AT TIME OF OBSERVATION-THUNDERSTORM DURING THE PRECEDING HOUR BUT NOT AT TIME OF OBSERVATION 95,THUNDERSTORM, SLIGHT OR MODERATE, WITHOUT HAIL, BUT W/RAIN AND/OR SNOW AT TIME OF OBSERVATION-THUNDERSTORM AT TIME OF OBSERVATION 96,THUNDERSTORM, SLIGHT OR MODERATE, WITH HAIL AT TIME OF OBSERVATION-THUNDERSTORM AT TIME OF OBS. 97,THUNDERSTORM, HEAVY, WITHOUT HAIL, BUT WITH RAIN AND/OR SNOW AT TIME OF OBSER.-THUNDERSTORM AT TIME OF OBSERVATION 98,THUNDERSTORM COMBINED WITH DUSTSTORM OR SANDSTORM AT TIME OF OBSER.-THUNDERSTORM AT TIME OF OBS. 99,THUNDERSTORM, HEAVY, WITH HAIL AT TIME OF OBSERVATION-THUNDERSTORM AT TIME OF OBSERVATION