how do mist and fog form?

Answer 1

Good question. Now remember first that the dewpoint is the temperature to which the air must be cooled to produce saturation, or 100 % humidity. When this occurs fog forms. Mist on the other hand is a form of fine precipitation in which the relative humidity may be significantly lower than 100%. The temperature tells us how much moisture the air can hold while the dewpoint tells us how much moisture the air does hold.

Answer 2

Thick mist is called fog.Fog is said to prevail when the visibility is less than 1000 meters.Mist is said to prevail when the visibility is between 1000 metres and 2000 metres.Above 2000 metres ,haze is said to prevail which is different from mist and fog.
Both mist and fog form in a similar way.
Fog is formed(1)when the temperature is reduced below the dew point or (2)when moisture is added to air until condensation takes place.
As stated above,the temperature is brought down below the dew point by the loss of heat by radiation of energy into space. This cools the air near the surface resulting in the formation of suspended water droplets in the atmosphere by condensation.This is how the ground fog(which is a common type of fog) is formed.
The conditions favourable for the formation of this radiation fog are(1)Clear sky (2) ground inversion (3) light wind and (4)presence of sufficient moisture in the air.

Answer 3

Fog - A visible aggregate of water droplets suspended in the air at the Earth's surface. Fog is literally a cloud on the ground.
(1) By definition, dense fog reduces horizontal visibility to 1/4 mile or less.
(2) Fog is reported in aviation weather observations when it reduces horizontal visibility below seven miles.
Mist - Water droplets so small that they are suspended in the air. Because mist droplets do not fall, mist is a type of fog and is not considered to be precipitation. It is erroneous to refer to very light rain as mist.

Answer 4

I think of the forms as a text book. If you have a teacher and partners in front of you then learning and training with them will be the best way to practice. However once you are home or have a short term leave where you won’t have an instructor and a partner the forms becomes your best source of learning. Think of the forms also not as a preplanned battle tactics, but as a math text book. You’ll learn 2+3=5, 5+3-2=6, and that 5*2+3-4=9. Will you use these exactly as they are? You’ll add 2 apples and 3 oranges to get 5 fruits, but you won’t have to add 5 apples to 3 oranges then take out 2 apples to get 6 fruits so much. But the idea is to train the most basics and more likely so that when faced with a new situations then you’ll know the principles by heart and come up with brand new solutions to questions you never have been asked.

Answer 5

The formation of mist and fog is about the same as a cloud. The layer of air (in the case for fog it is at the earth's surface) is near or at saturation with respect to water and then is cooled by either lifting slowly or by cooling (usually radiational cooling) further to attain saturation and the water will condense into microscopic water droplets on condensation nuceli. Theses droplets are so small they are suspended in the air.

Now for mist it becomes a little tricky. In most countries, mist is the same as fog. The difference between the two are in what the visibility is.

The one country there is an exception to this is the USA. Popularly mist is the same as drizzle.

Here is a quote from the American Meteorological Society (AMS) Glossary.

"drizzle—(Sometimes popularly called mist.) Very small, numerous, and uniformly distributed water drops that may appear to float while following air currents.
Unlike fog droplets, drizzle falls to the ground. It usually falls from low stratus clouds and is frequently accompanied by low visibility and fog. In weather observations, drizzle is classified as 1) light, the rate of fall being from a trace to 0.3 mm (0.01 in.) per hour; 2) moderate, the rate of fall being from 0.3 to 0.5 mm (0.01–0.02 in.) per hour, and 3) heavy, the rate of fall being greater than 0.5 mm (0.02 in.) per hour. When precipitation equals or exceeds 1 mm (0.04 in.) per hour, all or part of the precipitation is usually rain. However, true drizzle falling as heavily as 1.3 mm (0.05 in.) per hour has been observed. By convention, drizzle drops are taken to be less than 0.5 mm (0.02 in.) in diameter. Larger drops are considered raindrops. Compare mist."

Now compare that to the AMS glossary for mist. Again quoting:

“mist—1. A suspension in the air consisting of an aggregate of microscopic water droplets or wet hygroscopic particles (of diameter not less than 0.5 mm or 0.02 in.), reducing the visibility at the earth's surface to not less than 1 km or 5/8 mi.
The term mist is used in weather reports when there is such obscurity and the associated visibility is 1000 m or more, and the corresponding relative humidity is 95% or more, but is generally lower than 100%. These hydrometeors form a thin greyish veil that covers the landscape. It also reduces visibility, but to a lesser extent than fog. 2. In popular usage in the United States, same as drizzle. "

So, it depends on what country you are in how it is defined. .

Nothing in weather is easy.

Answer 6

air becomes saturated, usually by cooling for a radiation fog, and water condenses out