Graphical Hazardous Weather Outlook - Visibility

Weather Impact Levels

Visibility Hazard

Resources
	About Fog

Legend
None	No visibilities below 1/4 mile.
Slight	Patchy (1-20% coverage) visibilities < 1/4 mile in fog or < 1 mile in heavy rain
Moderate	Areas (30-50% coverage) of visibility < 1/4 mile.
High	Widespread (60-80% coverage) visibilities < 1/4 mile.
Extreme	Total (>80% coverage) visibilities < 1/4 mile.