Stratus and nimbostratus clouds are found where warm and humid air is lifted over cooler air ahead of a front.
Fog
This could apply to any low-level cloud. If the cloud is at ground level it is called fog.
There are two types of fog, advection fog and radiation, or ground fog. Advection fog is common along the pacific coast of the United States. Warm, moist air over the Pacific Ocean is blown inward. The other kind of fog is radiation, or ground fog. This fog is common lots of places. It forms when a layer of warm, moist air forms low to the ground.
Water gets down on Earth by rain, snow, and other forms of weather. How water gets up though, is kind of a weird answer, though I will try my best to answer it. When it rains, some of the water that falls leads into the ocean. Then, when the sun comes out, the sun evaporates some of the water in the ocean, and the water becomes moist air. The moist air moves around like any other air, so it go upwards. That air then forms clouds, and after a while, to much moist air is in the cloud. So the cloud releases the air as water, then that whole process starts over again. I hope I answered your question.
During the parts of the year when less rain falls, the constant cloud cover is enough to keep the air moist and prevent plants from drying out.
Fog
This could apply to any low-level cloud. If the cloud is at ground level it is called fog.
A wall cloud forms when the rotating updraft of a supercell thunderstorm, called a mesocyclone, draws in moist air and causes the moisture to condense. The wall cloud marks the strongest part of the mesocyclone.
Yes, rising warm moist air adds energy to a cloud. This energy can be released in many forms (e.g. tornados, lightning) and the moisture can fall out in many forms too (e.g. rain, snow, sleet, hail).
The funnel cloud forms ins the very early stages as the vortex descends below cloud base. It pulls in moist air, and the pressure drop in side it cools the air, causing the moisture to condense.
Cooler. The cloud forms because the water vapor condenses by cooling down. Thunderstorms occur because a warm, moist air mass is cooled by an incoming cold air mass. When the moist air gets chilled, the water vapor condenses to form clouds, resulting in rain.
A funnel cloud forms when the vortex of a developing tornado draws in moist air. As the air enters the vortex it undergoes a pressure drop, which in turn produce a temperature drop. This causes the moisture to condense and form a funnel cloud.
no
Yes, rising warm moist air adds energy to a cloud. This energy can be released in many forms (e.g. tornados, lightning) and the moisture can fall out in many forms too (e.g. rain, snow, sleet, hail).
keeps them moist
Generally the air is moist as tornadoes require thunderstorms to form.
The funnel cloud forms when the tornado pulls in moist air and the pressure drop inside the tornado cools the air and causes condensation. The funnel shape is due the fact that air at higher altitudes is generally cooler, which allows more of the moisture to condense, resulting in a cloud that is wider at the top than a t the bottom.