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Questions tagged [weather]

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2answers
38 views

Exact mode of evaporation

I am having a doubt regarding what is the exact mechanism of cooling during evaporation. At one place it is said that as surface water molecules evaporate it takes heat from surroundings and hence ...
0
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0answers
12 views

What are the implications of a warmer earth for hurricanes by 2100?

The main magic number is the surface sea water temperature. Above, I think 27 C the warm, moist air provides more energy that the storm uses. This is why the hurricane season is late summer into ...
3
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1answer
126 views

Is it possible to find dry ice crystals lying around the base in Antarctica?

Dry ice sublimates at -78.5°C, while the lowest temperature registered is about -89.2°C around the Vostok station in Antarctica. Imagine a person living on that station on that day (or night, since it ...
2
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1answer
46 views

When the barometer drops, my well level seems to rise - how?

I have a deep water well, with a length of 1/4" drip tubing, open at the bottom, taped to the pump 180' down. The other end of the tubing is connected to a gauge pressure sensor in the cabinet of my ...
3
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1answer
78 views

Why does high pressure cause clear skies?

In high-pressure areas, air falls, but why does high pressure leads to clear, sunny skies?
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0answers
8 views

What forms of energy are present in a thunderstorm

Is there plasma present and if so can the interraction of the wind with the clouds cause the charges move in such a configaration that it creates a rotating electric field?
1
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1answer
32 views

What exactly is the time step in weather predictions?

The question basically says it all. I am confused as to what the 'time step' in weather prediction signifies-- is it the time interval between each measurement of the initial condition? Or is it the ...
1
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2answers
39 views

What kind of outdoor weather is ideal for condensing moisture that's in air?

What kind of outdoor weather is ideal for condensing moisture that's in air? Temperature, humidity? Does condensation increase the more difference in temperatures there is?
0
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1answer
78 views

How do frogs and fish rain? [closed]

I saw a documentary about the rain of frogs and fish in certain areas due to water sprouts sucking them up and causing rain of frogs and fish (pretty large ones) hundreds of miles away. But how is it ...
2
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2answers
80 views

Why are clouds lighter than the sky during the day but darker at night

This is probably a very basic question but I couldn't find a good answer to it, most search results are about rain clouds or clouds appearing red at night (something I've never seen except for during ...
9
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0answers
154 views

Why do random slabs stay dry in the rain?

The image below shows the slabbed area I can see from my work window Whenever it rains some of the slabs stay dry however, it is never consistent which ones. Can anyone explain why this happens to ...
-5
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1answer
65 views

if you shoot rpg in eye hurricane, destory it? [closed]

I been think way to save people by destroy the hurricane.
40
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5answers
7k views

Why aren't rainbows more common?

Why are rainbows relatively rare? On any given day, there are billions of water drops in the air of varying sizes and dispersions, all of which light is passing through and refracting. What physical ...
1
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1answer
26 views

Is it sufficient to consider a small part of a system (without potential energy sources which can be released) to determine if it's chaotic?

The world around us abounds with chaotic systems: dripping taps (when a certain dripping rate is reached the dripping becomes irregular, which can be seen in this old but very entertaining video, ...
0
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1answer
23 views

Wind direction affecting temperature,

I am working on a paper for a Graduate School class and I wonder how can I create an experiment that shows how wind direction affects temperatures? I understand the concept myself however I want to ...
0
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1answer
46 views

What causes the perceived intensity of the sun to change on a short timescale?

I was inspired by this question to ask, what causes the "beating down" feeling of the sun to vary day to day? While the linked post explains why the sun feels hotter in the summer than in the winter, ...
1
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1answer
27 views

Human body water storage effects on weather patterns

There are 7.614 billion humans and counting. On average a human being consists of 60% water. With that water being locked away from natural circulation for an average of 80 years. Are there any ...
0
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1answer
34 views

How to know wind speed, given the force

I'm doing a game that is set in a desert and there are sand storms that occur periodically. What I've done is very basic and far from realistic, which is ...
0
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0answers
121 views

Calculate Height of Ocean Tides if Earth Had a Larger/Smaller Radius

For context, I'm coming at this question from the Worldbuilding stackexchange, where I've posted a related question. I'm not a physicist or scientist by training, so if I make any glaring errors, ...
2
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2answers
82 views

Icy roads while the temperature is above 0 Celsius?

The temperature last night in my suburb and in Montreal was 4 Celsius at 9 P.M. . The snow and rain of the day had melted and the roads were damp but not icy. This morning at 5 A.M, the temperature ...
3
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1answer
291 views

How do convective clouds form?

What are necessary conditions to form convective clouds with their flat cloud base, like this one: I know that convective instalibity at the ground is at start of the process, but I have realized ...
0
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2answers
54 views

Why does cooling down result in a decrease in density?

In chapter one of the textbook by AC Phillips, we find "... as the temperature fell, the density of the universe became too low for the neutrinos to interact effectively with matter..." This doesn't ...
3
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1answer
144 views

Why do we feel hot when temperature is relatively high even though it might be lower than our normal body temperature

This question popped into my head while studying simple thermodynamics. Let's say the air temperature outside is 30 degrees Celsius/ 86 fahrenheit, which is relatively high to the average, even though ...
-1
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1answer
39 views

Sun distance, temperature changes

During winter, given that over a few days the earth is basically the same distance from the sun, why can there be such a significant drop in temperature in just one or two days that have equally ...
3
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0answers
95 views

Why don't two air masses just mix in the atmosphere?

In weather fronts, two air masses of different temperature, density etc. meet and one just moves over or under the other. Why do these two just mix together? What is the physical mechanism that ...
5
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0answers
52 views

What is this line on water? [duplicate]

What is this line on water? What causes this difference in appearance? I often see it on lakes. Not sure if it appears in the sea too.
5
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1answer
313 views

Does fog clean the air of fine dust

When fog forms, the air is usually saturated with moisture. Thus, small droplets form and creates fog. Suspended fine dust can serve as condensation nuclei during the formation of fog. So my question ...
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3answers
2k views

Why is it hot before raining?

What causes the temperature hike before a rain? I have heard explanations like one that says as the moisture rises, you sweat more. Can somebody provide a more scientific explanation for this.
1
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3answers
3k views

If I shoot into a hurricane, can the bullet come back and hit me?

Are the winds strong enough to turn a bullet around and launch it back towards me? I'm (incorrectly) assuming there's no debris to bounce off of; I just want to know if the winds are strong enough.
1
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1answer
162 views

What's the point of normalizing air pressure in the weather report?

If I were to check the weather report on a typical day where I live I would probably see that the air pressure is something like 101kPa. I understand that this has been normalized to sea-level. In ...
-3
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2answers
60 views

Tornado vs sound speed

A tornado can be faster than sound, on Earth? Please explain as for a 6 years old (I am not the one interested in tornadoes).
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0answers
34 views

Large circular distribution of clouds

I've just noticed a strange circular pattern of clouds, above Netherlands, in a weather forecast website: This image was taken from the website around 11h30, and it was the frame from 9h45 (CET). Is ...
34
votes
3answers
7k views

Why does snow stay after a snowfall?

I have just experienced a snowfall and I am not so clear on how it works. Three days after a short day of snowfall, and having 2 min | 17 max degrees Celsius, full sunny scarcely cloudy each day, ...
1
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1answer
366 views

Noise heard simultaneously with lightning

During a recent thunderstorm in an urban area, I saw lightning strike within about half a mile, estimated as such because I heard the thunder about 2 seconds after I saw the strike. What surprised me ...
35
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1answer
4k views

Why does wind direction significantly affect sound propagation?

I live about 2 miles from a race track. Some days the noise from testing is extremely noticeable, Other days despite the exact same testing activity, there is little-to-no noise at all. This is ...
-1
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1answer
327 views

Why don't cloud water droplets fall to the ground? [duplicate]

Clouds are made of extremely small droplets of water ranging from 1 to 100 microns. Their high surface area to volume ratio means that air resistance would greatly slow their fall. However, ...
6
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1answer
64 views

Does the wind push harder at lower temperatures?

When air gets colder, the air molecules get closer together. Does this mean that for a given wind speed, the wind will push much harder against objects and people at a lower temperature than at a ...
1
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1answer
75 views

What produces high and low meteorological pressure areas?

I know the common explanation is that the hot air raises due to lower density and creates a low pressure zone and the air then flows from high pressure (cold) to low pressure (warm) areas, but that ...
25
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3answers
5k views

Why is snow white when water has no color? [duplicate]

I just don't get it. Isn't snow just another form of water? Also are all ices transparent or do they go white after a certain temperature?
1
vote
2answers
42 views

Temperature or Heat in reported temperatures

When I look at the digital thermometer or read the current temperature in my area, am I looking at a value based on the heat of the area or something else? If it's not based on actual heat, could this ...
6
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4answers
1k views

Why does fog float?

I was reading this question: Physical state of Fog And it made me curious about the larger question of how fog exists at all, that is, what causes an aerosol to remain suspended in air? There's an ...
10
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2answers
184 views

Why fog and water have such a good relationship

Today in the morning, I was in the bus and when the bus was on a flyover (which was built on a river) I saw an interesting thing. There was a lot of fog there, so much that it was impossible to see ...
1
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1answer
333 views

Dew on the grass

A large drop of dew forms on the very tip a blade of grass. Dew forms on grass when a blade of grass looses heat by radiation from its whole surface and is cooled down to the dew point of the ...
3
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1answer
529 views

Air column pressure distribution in the atmosphere for high/low ground pressure

I cannot figure out how to imagine the high and low (ground level) pressure effect on the rest of the atmosphere. How is the air column distribution different from a mean pressure? "Areas of high and ...
-1
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1answer
106 views

Can rails on the ground or blimps in the air be positioned to collect lightning?

This question was inspired by Ben Franklin key on a kite string. There's A Place On Earth That Experiences 1.2 Million Lighting Strikes A Year. In a small area of northwestern Venezuela, where the ...
0
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1answer
381 views

Where to start, if I would like to run a planet climate simulation? [closed]

I would like to understand the math behind it, and maybe write an own climate simulator program. I know, that it is a really hard subject. But I'm curious, and I would like to learn more about it. But ...
2
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1answer
111 views

Why do clouds appear pinkish after rain?

Monsoon winds are blowing over India and after every rain I observe that the clouds are turning pinkish, even during the night. What causes such a phenomena? Or are the observations coincidence?
2
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2answers
110 views

Can we calculate some of the main properties of lightning? [closed]

I've always been really interested in lightning. It's so cool, yet it's never really discussed in depth in typical physics courses. How do you calculate some of the basic properties of lightning? For ...
3
votes
1answer
267 views

What causes the silence before the storm?

Everybody meet that phenomenon if a big storm comes (for example a cold front after a long heater period), before the arriving there is a short silence time, when there isn't nothing (no wind, no bird ...
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0answers
40 views

Cloud measurement apparatus, please help with the design

Radar satellites currently use IR measurements of cloud albedo to determine the water mass, density, and altitude of clouds, to understand precipitation for weather forecasts. I am studying a ...