When cold air meets warm air, frontal wedging occurs. In frontal wedging, cold air forces warm air upward; the warm air then forms clouds, resulting in rain.Continue Reading
When cold and warm air collide, one of four types of frontal wedging occurs: warm, cold, stationary or occluded. A warm front occurs when warm air pushes away cold air. These usually come in from the southwest. When cold air pushes out warm air from the northwest, this is called a cold front. When a stationary front occurs, warm and cold fronts move in and push against each other, but neither manages to push the other one out, resulting in clouds and storms.
An occluded front occurs when both warm and cold air are moving in the same direction and one overtakes the other. If the cold air overtakes the warm air, then it is considered a cold occlusion. If the opposite happens, it is called a warm occlusion. Experts believe that an occluded front is a sign that a storm is almost blown out and weakening.
Not all air collisions occur between warm and cold air. In some cases, two air masses with the same temperature collide in a process called convergence. When this happens, both air masses rise and form clouds.Learn more about Weather & Tides
Microbursts are columns of sinking air in a thunderstorm that are 2.5 miles or less in diameter. There are three types of microbursts: wet, dry and hybrid. Wet microbursts are accompanied by precipitation, dry microbursts come with little precipitation, and hybrid microbursts possess characteristics of both wet and dry.Full Answer >
The term "basement humidity level" refers to the moisture content of the air in a basement. A humidity level above 80 percent encourages mold and mildew development, according to Basement Health Pros. The ideal humidity level for a basement is around 50 percent.Full Answer >
Examples of longitudinal waves are sound waves in air and primary waves, known as P waves, in earthquakes. Longitudinal waves are waves in which the displacement of particles occurs in parallel to the direction the wave travels. These waves are also called l-waves.Full Answer >
A rainbow is an optical illusion caused by water droplets reflecting, refracting and dispersing light, causing a prismatic representation of the color spectrum to appear in air. Rainbows can be single, also known as a primary rainbow, or they can be double.Full Answer >