Visibility

Other than precipitation the three main things that can inhibit visibility are fog, mist, and haze. The international definition of fog is a visibility of less than 0.62 miles, or 1 kilometer.

Mist is a visibility of between 0.62 and 1.2 miles (1 to 2 kilometers), while haze is a visibility between 1.2 to 3.1 miles (2 to 5 kilometers).

Aside from the visibility categorization, fog and haze form in a totally different way. Mist and fog are caused by water droplets in the air, and the only difference is visibility, as discussed above. On the other hand, haze is the reflection of sunlight off of air pollution, typically found on hot and humid summer days.

Note: Mist is not the same thing as drizzle or light rain. Drizzle is precipitation consisting of numerous tiny droplets of water less than 0.02 inches in diameter. Light rain is simply rain falling at a rate of 0.1 inches or less per hour. Both drizzle and light rain fall to the ground, while mist and fog, which remain in the air close to the ground.

Advertisements

2 thoughts on “Visibility

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s