Precipitation and Fog (50-58).

50

Slight r

2f. or 3f.

51

Moderate r

52

Heavy r

53

Slight r

4f. or 5f.

54

Moderate r

55

Heavy r

56

Slight r

6f. to 8f.

57

Moderate r

58

Heavy r

Precipitation and Squalls of Wind (59-70).

59

Slight r.

60

Moderate r.

61

Heavy r.

62

Slight h.

63

Moderate r. and h.

64

Heavy r and h.

65

Slight rs.

66

Moderate rs.

67

Heavy rs.

68

Slight s.

69

Moderate s.

70

Heavy s.

Snow Covering.

71

s over whole country.

72

s with bare patches.

73

Deep drifts.

74

Reserve figures

75

Reserve figures

76

Reserve figures

Precipitation (77-97).

77

Slight d.

78

Moderate d.

79

Thick d.

80

Slight r.

81

Moderate r.

82

Heavy r.

83

Slight h.

84

Moderate h.

85

Heavy h.

86

Slight rs.

87

Moderate rs.

88

Heavy rs.

89

Slight s.

90

Moderâte s.

91

Heavy s.

92

Slight tlr.

Without hail

93

Moderate tlr.

Without hail

94

Heavy tlr.

Without hail

 

95

Slight tir

With hail.

96

Moderate tlr

97

Heavy tlr

98

Reserve Figures.

99

Code II. - Past Weather. - WW.

Note. - 00-49. Weather without precipitation. 50-97. Weather with precipitation.

No Precipitation or Fog (00-14).

00

equals

Cloudless.

01

-

b and bc; med. or high cloud.

02

-

b and bc; low cloud.

03

-

b and c; mixed cloud.

04

-

bc and c; med. or high cloud.

05

-

bc and c; low cloud.

06

-

bc and c; mixed, cloud.

07

-

c and o; med. or high cloud.

08

-

c and o; low cloud.

09

-

c and o; mixed cloud.

Overcast with blue patches (10-12).

10

equals

med. or high cloud.

11

-

low cloud.

12

-

mixed cloud.

13

-

completely overcast; low or mixed cloud.

14

-

b and o; low or mixed cloud.

Fog with Cloüd above (15-19).

15

equals

overcast and 1f.

16

-

overcast and 2f.

17

-

overcast and 3f.

18

-

overcast and 4f. or 5f.

19

-

overcast and 6f. to 8f.

 

Haze or Fog (20-24).

20

equals

Haze 1f.

21

-

Haze 2f.

22

equals

Fog 3f.

23

-

Fog 4f. or 5f.

24

-

Fog 6f. to 8f.

Wet Fog, or Mist (25-29).

25

equals

Mist 1fe.

26

-

Mist 2fe.

27

-

Fog 3fe.

28

-

Fog 4fe. or 5fe.

29

-

Fog 6fe. to 8f.

Special Phenomena without Precipitation (30-49).

30

equals

e (we air).

32

-

Dust Haze.

33

-

Dew.

34

-

Hoar Frost.

35

-

Rime.

36

-

Glazed Frost.

37

-

Glazed Roads.

38

-

Solar Halo.

39

-

Lunar Halo.

40

-

Solar corona.

41

-

Lunar corona.

42

-

Aurora.

43

-

Squalls.

44

-

Gale.

45

-

Gloom.

46

-

Ugly; threatening.

47

-

Thunder.

48

-

Lightning.

49

-

Thunder and Lightning.

Precipitation. Passing Showers (50-61).

50

of slight

rain

51

of moderate

52

of heavy

53

of slight

hail or r and h.

54

of moderate

55

of heavy

56

of slight

57

of moderate

58

of heavy

59

of slight snow.

60

of moderate snow.

61

of heavy snow.

 

Occasional Precipitation (62-76).

62

occasional

slight d.

63

-

moderate d.

64

-

thick d.

65

-

slight r.

66

-

moderate r.

67

-

heavy r.

68

-

slight r and h.

69

-

moderate r and h.

70

-

heavy r and h.

71

-

slight

rs or r and rs.

72

-

moderate

73

-

heavy

74

-

slight s.

75

-

moderate s.

76

-

heavy s.

Continuous or nearly continuous Precipitation (77-91).

77

slight

drizzle.

78

moderate

79

thick

80

slight

rain.

81

moderate

82

heavy

83

slight

r and hail.

84

moderate

85

heavy

86

slight

rs or r and rs.

87

moderate

88

heavy

89

slight

snow.

90

moderate

91

heavy.

Thunderstorms (92-97)

92

slight tlr

without hail.

93

moderate tlr

94

heavy tlr

95

heavy tlr

with hail

96

slight tlr

97

heavy tlr

98

Reserve Numbers.

99

Code III. - Form of Cloud.


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