0 0 No significant weather phenomena
1 1 Blowing snow, sand storm, dust storm
2 2 Fog, ice fog, thick haze (visibility < 4 km)
3 3 Drizzle
4 4 Rain
5 5 Snow
6 6 Showers of snow, rain, rain and snow mixed, hail
7 7 Thunderstorm with or without precipitation
8 8 Top of inversion layer < 800 m
9 9 Top of inversion layer < 800 m (typo?)
10 10 Top of inversion layer < 800 m (typo?)
15 15 Missing value
