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2
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2answers
392 views

What is atmospheric stratification?

In the context of atmospheric stability, what are the meanings of stable or unstable stratification? What is stratification?
2
votes
1answer
109 views

Are low pressure and high pressure areas responsible for rain?

My understanding is that low pressure areas are susceptible to rain. However, high pressure areas have no rain. Now, I want to correlate this with the following areas - Lower Hutt, Wellington , NZ - ...
2
votes
1answer
117 views

What does “downshear” mean?

I occasionally read descriptions such as "downshear of the vortex" in meteorological publications. What does this mean?
1
vote
1answer
28 views

Why do circular “snowrafts” form on a lake during a blizzard?

I was just out walking along Lake Michigan during a snowstorm and I noticed that the snow was clumping into these interesting circular "snowrafts". They all seem to be about 6 to 10 feet across with a ...
0
votes
1answer
23 views

How could I calculate the Heat Index with low humidity?

The formula shown in the Heat Index(HI) requires that the relative humidity should be equal to or greater than 40%, so how to calculate the heat index when the humidity is less than 40%? Or is there ...
0
votes
1answer
17 views

By which factors are tides and waves affected?

To my understanding, the tides and waves on Earth's oceans are caused by various factors such as the moon's gravity, the water cycle (rains, storms, evaporation), Earth's rotation, etc. Although the ...
4
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0answers
55 views

Lightning sprites

Lightning usually occurs due to an electrostatic discharge between an electrically-charged cloud and the Earth's surface, or between clouds. There are also sprites, electrical discharges that occur ...
2
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0answers
29 views

Dispersion parameters for Pasquill–Gifford stability class G (extremely stable)

Gaussian plume models are often used to model atmospheric dispersion because they are simple and computationally efficient. When not constrained by the ground or by inversion layers, the Gaussian ...
2
votes
0answers
382 views

How far we can see in the thickest possible fog?

There is quite foggy day today here, I cannot see end of the street. This made me think about how much worse can it be. So here is my question: how thick a fog can be? What's the smallest visibility ...
1
vote
0answers
18 views

What are the “balls” that are present in lightning?

Whenever I see a slow-motion video of lightning, I see that there are some sort of balls going around before the real discharge. My question is.. what are those? (Video for reference: https://vimeo....
1
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0answers
16 views

What is wind chill a function of?

When the weather report includes a wind chill, was that value experimentally determined by sampling the conditions on the day of the report? Or was it calculated from other data? If so, what do you ...
1
vote
0answers
29 views

Atmospheric Tides effect on atmospheric pressure

Regarding the atmospheric tides effect on the pressure, this answer (and the referenced sources) seem to point that such effect is very small. However, this pressure prediction graph for my hometown ...
1
vote
0answers
58 views

Heat transfer between river and air

There is a temperature sensor about 200 feet back from a large river, at about the same height as the river. A sewage pipe continuously dumps water of about 12 degrees C in the river directly in front ...
1
vote
0answers
15 views

Why hydrodynamic turbulence without heat terms matters?

A lot of research is made on turbulence in "pure" Navier-Stokes equations (NSE). There is a notion of energy cascade when energy comes from larger scales to lower scales and than dissipate. However ...
0
votes
0answers
10 views

How does Dual-polariasation weather radar detect raindrops that have a larger H to V ratio

I was reading this document on dual polarisation weather radar - http://www.wdtb.noaa.gov/courses/dualpol/documents/DualPolRadarPrinciples.pdf and looking at how this can be used to detect when water ...
0
votes
0answers
41 views

Explanation of crystal formation in a Fitzroy's storm glass with the change in weather conditions

I was recently reading about Admiral Robert FitzRoy's storm glass and how it was used to predict the weather conditions based on the formation of camphor crystals in a sealed glass tube containing ...
0
votes
0answers
59 views

Temperature change as function of solar elevation, current temperature, and cloud cover?

If it's 80F with clear skies, and the sun is at a 54 degree angle, what is the rate of temperature increase or decrease? More generally, where can I find a formula or approximation that takes ...