The orographic effect occurs when air masses are forced to flow over high topography. As air rises over mountains, it cools and water vapor condenses. As a result, it is common for rain to be concentrated on the windward side of mountains, and for rainfall to increase with elevation in the direction of storm tracks.

Orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge.

Frontal uplift occurs when two different air masses interact. The rising warm air cools to produce clouds and precipitation. Orographic uplift occurs when air is forced upward by a topographic obstacle, like a mountain. Rising air cools to form clouds and precipitation.

Convectional rainfall. When the land warms up, it heats the air above it. This causes the air to expand and rise. Orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range.

Here are the three main types of rainfall:

• Relief Rainfall.
• Convectional Rainfall.
• Frontal Rainfall.

In the equatorial regions, convectional rainfall is received almost daily in the afternoon. It generally happens regularly at 4 p.m. throughout the year. For this reason it is called 4’o clock rainfall. In the late afternoon the clouds burst into a heavy downpour often accompanied by thunder and lightning.

Convectional rainfall

The common name of four o’clocks was given to Mirabilis jalapa because the flowers of this plant do not open until late in the day. Native to tropical South America in the Andes – and also sometimes called Marvel of Peru – it is the most commonly grown ornamental species of Mirabilis.

In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzling, rain, sleet, snow, ice pellets, graupel and hail. Short, intense periods of rain in scattered locations are called showers.

Pluviophile (n.) A lover of rain; someone who finds joy and peace of mind during rainy days.

Drizzle is a term used for a very light, fine rain. The drops tend to be very small and not very dense. Mist is similar to drizzle, only the number of drops in any given area is greater.

Precipitation – General name for water in any form falling from clouds. This includes rain, drizzle, hail, snow and sleet. Although, dew, frost and fog are not considered to be precipitation.

Freezing rain begins as snow, but when it reaches the warm pocket, it melts and becomes rain. Before hitting the ground, it passes through a very shallow pocket of cold air, which cools it some but not enough to turn it into sleet.

Black ice, sometimes called clear ice, is a thin coating of glaze ice on a surface, especially on roads. The ice itself is not black, but visually transparent, allowing the often black road below to be seen through it.

snowmelt

Snow is still great, just refrain from eating it! The study revealed that from just one hour of exposure, the levels of pollutants within the snow increased dramatically, with toxic particles becoming trapped within the small ice particles or dissolved within the pockets of melted snow.

SNOW means “Cocaine” So now you know – SNOW means “Cocaine” – don’t thank us. YW! What does SNOW mean? SNOW is an acronym, abbreviation or slang word that is explained above where the SNOW definition is given.

The light fluffy snow forms when all layers of the atmosphere are below freezing. because the air is cold, all the way down to the surface, snowflakes don’t melt. That allows the individual flakes to stay light and fluffy.

These larger aggregates occur when temperatures are near freezing (32 degrees), which melts some of the snow crystals and causes them to become sticky. As the snow crystals fall, they collide with other snow crystals, causing them to grow in size and appear as larger snowflakes once they get closer to the ground.

Snow is an insulator. Its R-value varies, depending on moisture content and density of the snow granules; but on average snow has an R-value of 1 per inch — about the same as wood. Twelve inches of snow have roughly the same insulating value as a 2×4 wall filled with fiberglass insulation.