Visibility Flashcards
1
Q
Fog is (visibility and RH)
A
Visibility < 1000m
RH - 100%
2
Q
Haze is …
A
Visibility -1000-5000m
RH- < 95%
3
Q
Mist
A
1000-5000m visibility
RH- 95%+
4
Q
Heavy rain -
Moderate rain -
Moderate to heavy drizzle -
A
1000m or less
3000m-10km
500-3000m
5
Q
Radiation fog
A
High RH
Clear skies
Forms at night and early morning
2-8kts wind
100-400m thick
6
Q
Advection fog
A
High RH
Sufficient wind -15kts
Cold underlying surface
7
Q
Humid air blown towards hills
A
Is likely to lead to the formation of hill fog
8
Q
WMO low level cloud visibility is
A
10-30metres
