Notation	Name	Description	Status
0	Cloud covering 1/2 or less of the sky throughout the appropriate period		stable
1	Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period		stable
2	Cloud covering more than 1/2 of the sky throughout the appropriate period		stable
3	Sandstorm, duststorm or blowing snow		stable
4	Fog or ice fog or thick haze		stable
5	Drizzle		stable
6	Rain		stable
7	Snow, or rain and snow mixed		stable
8	Shower(s)		stable
9	Thunderstorm(s) with or without precipitation		stable
10	No significant weather observed		stable
11	VISIBILITY REDUCED (see Note)		stable
12	Blowing phenomena, visibility reduced		stable
13	FOG (see Note)		stable
14	PRECIPITATION (see Note)		stable
15	Drizzle		stable
16	Rain		stable
17	Snow or ice pellets		stable
18	Showers or intermittent precipitation		stable
19	Thunderstorm		stable
31	Missing value		stable