Notation	Name	Description	Status
0	Quasi-stationary front at the surface		stable
1	Quasi-stationary front above the surface		stable
2	Warm front at the surface		stable
3	Warm front above the surface		stable
4	Cold front at the surface		stable
5	Cold front above the surface		stable
6	Occlusion		stable
7	Instability line		stable
8	Intertropical front		stable
9	Convergence line		stable
10	Jet stream		stable
11	Cloud clear		stable
12	Cloud		stable
13	Turbulence		stable
14	Storm		stable
15	Airframe icing		stable
16	Phenomenon		stable
17	Volcano		stable
18	Atmospherics		stable
20	Special clouds		stable
21	Thunderstorm		stable
22	Tropical cyclone		stable
23	Mountain wave		stable
24	Duststorm		stable
25	Sandstorm		stable
63	Missing value		stable