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6
votes
1answer
59 views

Why is there no desert in Southeast China?

Arabia, Sahara and Southeast China and India all are on the tropic of Cancer yet Southeast China and India are not deserts. I know that India is not a desert because of monsoon wind which causes heavy ...
9
votes
2answers
716 views

Why do rivers sometimes travel down the opposite side of the mountains from where the rain happens?

My teacher explained that when wind coming from the ocean gets blocked by a mountain it makes rain on one side of the mountain, like in the image below. This rain leads to the creation of rivers. (...
33
votes
9answers
10k views

What does a mm of rain mean?

Lots of people have explained it over many sites but I still can not confidently say that I know what it means when they say Hong Kong experienced 3mm of rainfall last Friday. Does it mean that 3mm ...
0
votes
0answers
102 views

Looks like rain, but isn't

Two days in a row now, we have looked out the window to see the sparkling noise in the air that you see when it rains. If I go outside, I can see it around me, around 10-20 meters from where I stand. ...
5
votes
0answers
33 views

What are typical ranges of rainfall drop sizes, speeds, and areal or volume densities?

I'd like to look into the possibility of using a Raspberry Pi and the PiCam module to detect rain, and to try to make some measurements of droplet size and rate. This could be done using an LED flash ...
11
votes
1answer
199 views

How to tell the difference between real rain and fake rain (cloud seeding)?

I live in a city where the pollution is bad, so bad that sometimes we get 'fake' rain (from cloud seeding). This may last for an extended period. There have been times before when it has “rained” and ...
2
votes
0answers
109 views

Why are all rainbows are not the same? [closed]

How does these rainbows water drops differ? I know it has to do with the size of water drops refracting light. Is there a formula that determines the type of rainbow? Icebow Unlike this questions ...
1
vote
4answers
304 views

How is Doppler radar used in rain prediction?

How is Doppler radar used in rain prediction?
6
votes
1answer
93 views

Why is thunder and lightning rare, even though it rains frequently?

Why in some places (for example Dublin, Ireland) the thunder and lightning is such a rare thing even though it rains so frequently?
2
votes
1answer
81 views

National Weather Service “average daily/yearly” (temp, rainfall) life cycle?

Does anyone know the "life-cycle" of the averages used for daily and yearly temperatures and rainfall by the National Weather Service? I have lived in the same (semi-desert) area for over 40 yrs, and ...
2
votes
1answer
2k views

Why does it rain during the sunny day?

What are factors that cause rainfall while the sun is still shining. The phenomena is known as sunshower? The information I found so far is very limited. Please help me answer this question if you ...
2
votes
1answer
115 views

Reason for rotting smell after first rain of the season?

Last day we had first rain after 3-4 months of hot&dry weather, and within 3-4 minutes a rotting smell came from nowhere. Due this smell I had running nose for a day. What might be the reason for ...
6
votes
1answer
2k views

What would the pH of rainwater be if carbon dioxide in the atmosphere doubled?

Natural rain water is slightly acidic (pH = 5.6) since there is carbon dioxide in the atmosphere that dissolves to make carbonic acid. What would be the pH of rainwater if carbon dioxide in the ...
4
votes
1answer
319 views

What is a pre-monsoon shower? Is there any distinguishing feature between monsoon and pre-monsoon showers?

While attending a lecture about monsoon, our professor mentioned about pre-monsoon showers. However, he never bothered to explain it. So, what is a pre-monsoon shower and what are its distinguishing ...
3
votes
1answer
263 views

By how much can rain temperature vary from the ground-level air temperature?

I'm guessing that falling rain equilibrates fairly quickly to the temperature of the air it's falling through. However, it isn't always at the exact same temperature, which is why we can get the ...
4
votes
1answer
72 views

How effective is seeding rainclouds? What are the indications for initiating seeding?

I've heard that dry ice, iodides have been used as seeding agents to induce rainfall. Is this technique really being used widely? What are the prerequisites for initiating seeding? Is it as bounteous ...
11
votes
1answer
1k views

Does rain (temporarily) deplete the surrounding atmosphere of carbon dioxide?

CO2 in the air dissolves into rain water, making them slightly acidic. Is that enough to deplete the surrounding air out of CO2? If yes, how fast does this occur? Is it only with the first drops of ...
8
votes
2answers
846 views

How accurate is a tipping-bucket rain gauge?

My question is simple - how accurate is a tipping-bucket rain gauge? I have read about what causes the errors (wind, bucket mechanics for extreme events, ...) and I know the accuracy is strictly ...
6
votes
1answer
149 views

What is the significance of the “super historic” rainfall for July 2015 in southern California?

On July 19, 2015 there was record rainfall over the Los Angeles and San Diego areas. This is amidst a historic drought and the rain is needed. This article: http://www.weather.com/storms/hurricane/...