Question: What Conditions Do You Think Is Necessary For Rain To Fall?

What can affect rainfall?

Size, shape, slope and roughness of a channel influence the speed of surface run-off to streams and consequently the time allowed for infiltration and also for direct evaporation at the site of rainfall.

Hence these factors are also important in influencing effective rainfall..

Is 30 percent chance of rain a lot?

The forecast of a 30 percent chance of rain can mean all of the area will get rain if it rains, but the forecaster has only a 30 percent confidence that rain will indeed arrive. It can also mean that scattered rain is a certainty, but it will affect only 30 percent of the area.

What does 40% precipitation mean?

If the forecaster is only 50% sure that precipitation will occur, and expects that, if it does occur, it will produce measurable rain over about 80 percent of the area, the PoP (chance of rain) is 40%. ( PoP = . 5 x . … So a 50% chance of rain means that half of your day will get rain.

What would happen if there is no rain?

When little or no rain falls, soils can dry out and plants can die. When rainfall is less than normal for several weeks, months, or years, the flow of streams and rivers declines, water levels in lakes and reservoirs fall, and the depth to water in wells increases.

Does rain need dust to fall?

Raindrops and snowflakes require dust in the atmosphere in order to form because it requires less energy for water or ice to bond to a particle, than to form on their own.

At what precipitation does it rain?

Let’s say tomorrow’s forecast says your city has a 30% chance of precipitation. This does not mean: There’s a 30% chance it will rain and a 70% chance it won’t….How Much Rain Will Accumulate.TerminologyRainfall RateLight0.01 to 0.1 inch per hourModerate0.1 to 0.3 inches per hourHeavy>0.3 inches per hour1 more row•Aug 8, 2019

What is the meaning of lack of rain?

Definition of rainless. : lacking rain : lacking precipitation a rainless month.

What countries use cloud seeding?

Contents1 Methodology.2 Effectiveness.3 Impact on environment and health.4 History of cloud seeding. 4.1 Asia. 4.1.1 China. 4.1.2 India. 4.1.3 Indonesia. 4.1.4 Israel. 4.1.5 Kuwait. 4.1.6 Southeast Asia. 4.1.7 United Arab Emirates. 4.2 North America. 4.2.1 United States. 4.2.2 Canada. … 5 Conspiracy theories.8 External links.

Is artificial rain harmful?

Artificial raining is done by clod seeding. It is weather modification by dispersing substances into the air that served as clod condensation or ice nuclei. Harmful effects of this are as follow, Silver iodide used for such rain can cause temporary incapacitation in mammals.

What do raindrops really look like?

Raindrops start to form in a roughly spherical structure due to the surface tension of water. … As the raindrop falls, it loses that rounded shape. The raindrop becomes more like the top half of a hamburger bun. Flattened on the bottom and with a curved dome top, raindrops are anything but the classic tear shape.

What are the conditions necessary for rain to fall?

Solution: 1) The air must contain water vapor that can precipitate, 2) the moist air must cool down in order to release water in liquid form, and 3) there must be condensation nuclei for water vapor to condensate on.

How can you make it rain?

How to (Try to) Make It RainSeeding the Sky. The most widely used weather-modification technique is probably cloud seeding, which involves priming clouds with particles of silver iodide. … Rain Rockets. Airplanes aren’t the only way to seed clouds. … The Atmosphere Zapper. … Ice-Breaking Booms. … Riding the Lightning.

How do you enjoy a rainy day?

Here are 10 fun activities to enjoy with your children on rainy days.Go on a rainy day walk. Put those rain boots to good use and head out for a walk in the rain. … Measure the rain. … Make rain art. … Sing in the rain. … Go ahead and get wet. … Play in the mud. … Stay inside and make a fort. … Read about rain.More items…•

What happens to dust particles when it rains?

The atmosphere is full of tiny dust particles called condensation nuclei, which come from volcanic eruptions, dust storms, fires and pollution. When water vapor condenses, it clings to these microscopic specks. If there’s enough cooling water vapor in the air, these accumulate by the trillions to form clouds.

Why does rain not fall all at once?

The rain doesn’t dump all it’s water at once because: Inside the cloud, it always rains. Water vapor rises from the bottom of the cloud to the top, condenses and falls back to the bottom of the cloud, where it (mostly) vaporizes again and repeats this cycle.

What is the reason for low rainfall?

The proximate or immediate cause of a rainfall shortage may be due to one or more factors including an absence of available moisture in the atmosphere; large scale subsidence (downward movement of air within the atmosphere) which suppresses convective activity; and the absence or non-arrival of rain-bearing systems.

What causes high rainfall?

Heavy Rain & Flooding. More heavy rain is one of the hallmark signs of climate change. As the atmosphere warms, more water evaporates from soils, plants, lakes, and oceans. … So when this additional water vapor condenses into precipitation, it leads to heavier rain — or when cold enough, heavier snow.

Is fog a precipitation?

Fog begins to form when water vapor condenses into tiny liquid water droplets that are suspended in the air. … Fog commonly produces precipitation in the form of drizzle or very light snow. Drizzle occurs when the humidity of fog attains 100% and the minute cloud droplets begin to coalesce into larger droplets.