Quick Answer: Why Do We Record Rainfall?

Why is rainfall measured at 9am?

to get the extra rain between midnight at 9am.

Rain gauge is on the way into the office.

Forecast report is probably compiled then.

It’s not actually measured “to” 9am they just update the report at that time meaning the range of the forecast whatever it be daily weekly, monthly, it will start at that period..

How do you calculate rainfall?

Here’s what you’ll need to do:Measure the diameter of the bucket at the level of the rain. … Measure the diameter of the bucket at the bottom in the same way.Calculate the average of the two diameters.Divide by two to find the average radius.Find the average volume of rain = Depth x radius x radius x 3.14.More items…

What is the best digital rain gauge?

The 10 Best Wireless Rain GaugesRainWise Rainew. REVIEW.Ecowitt WH5360B. REVIEW. … Ambient Weather Station. REVIEW. … AcuRite 01012M. REVIEW. … Irritrol Sensor. REVIEW. … Netatmo Smart. REVIEW. … La Crosse Weather Station. REVIEW. … AcuRite 00899. REVIEW. … More items…

How heavy is an inch of rain?

Volume and weight One inch of rain falling on 1 acre of ground is equal to about 27,154 gallons and weighs about 113 tons.

What is a rainfall map called?

Answer. An isohyet or isohyetal line (from ὕετος or huetos, meaning ‘rain’) is a line joining points of equal rainfall on a map in a given period . A map with isohyets is called an isohyetal map.

Is rain water clean?

Most rain is perfectly safe to drink and may be even cleaner than the public water supply. Rainwater is only as clean as its container. Only rain that has fallen directly from the sky should be collected for drinking. … Boiling and filtering rainwater will make it even safer to drink.

Does rain more at night?

However, there are other reasons why we get more rain during the night. One factor is the top of the clouds cool during the night, allowing the air mass to reach its dew point more readily and produce greater amounts of precipitation — drizzle, rain, hail or snow.

What would happen if rain fell all at once?

Originally Answered: What if rain came down all at once and not in tiny raindrops ? Then we would all die. Not from the rain but because of the lack of oxygen. Moisture in the air can only condense into droplets of water when cooled down by the adiabatic effect of a lesser pressure.

What is the purpose of rainfall measurement?

By precisely measuring precipitation with a rain gauge, you’ll know when it’s the right time to plant certain types of flowers, vegetables, fruits, or even trees. You will also know when rainfall amounts are beneath optimal levels so that you can supplement with your own water.

What does 1mm of rain look like?

1mm rainfall means every one square meter area is filled with the water of height 1mm. So 1mm rain means 1000mm length × 1000mm breath × 1mm height = 1litre of water.

What is a lot of rain?

Moderate rain — when the precipitation rate is between 2.5 mm (0.098 in) – 7.6 mm (0.30 in) or 10 mm (0.39 in) per hour. Heavy rain — when the precipitation rate is > 7.6 mm (0.30 in) per hour, or between 10 mm (0.39 in) and 50 mm (2.0 in) per hour.

Who invented rain gauge?

In 1441, the Cheugugi was invented during the reign of Sejong the Great of the Joseon Dynasty of Korea as the first standardized rain gauge. In 1662, Christopher Wren created the first tipping-bucket rain gauge in Britain in collaboration with Robert Hooke.

Where should I put my rain gauge?

HEIGHT ABOVE THE GROUND In open areas place the gauge top approx. 2 feet off the ground. In developed areas place the gauge top approx. 5 feet off the ground.

What is the meaning of 10 cm rainfall?

When poured in a measuring glass cylinder with 10 Sq Cm base, the height will be amplified to 10 Cm but graduation will show as 1 cm; 1 cm will be 1 mm;and 0.1 cm will be 0.1 mm. So rainfall can be measured correct up to 0.1 mm.

Why is rain measured in cm?

Intensity of rainfall is the rate at which it falls at any one time. It is expressed as cm per hour or mm per hour. Rainfall is measured by means of rain gauges. … The rainfall collected in the bottle is measured with the help of a graduated measuring cylinder furnished with each rain gauge.

How does rain fall?

Water vapor turns into clouds when it cools and condenses—that is, turns back into liquid water or ice. … In the cloud, with more water condensing onto other water droplets, the droplets grow. When they get too heavy to stay suspended in the cloud, even with updrafts within the cloud, they fall to Earth as rain.