reference|https://www.wmo.int/pages/prog/www/WMOCodes/WMO306_vI1/Publications/2017update/Sel9.pdf
short_description|Visibility
wmo_code|4300
long_description|Horizontal visbility
codeTYPE|S
@| Values
0|Less than 50 m
1|50-200 m
2|200-500 m
3|500-1000 m
4|1-2 km
5|2-4 km
6|4-10 km
7|10-20 km
8|20-50 km
9|50 km or more