Questions tagged [meteorology]

The study of how the earth's atmosphere works, including weather forecasting. Use this tag for questions about the earth's weather. When asking questions specifically about the atmosphere, also include the [atmosphere] tag.

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6
votes
1answer
136 views

Are these plane trails seen from satellite

Here are photos from West of Normandy, at 7-9am after sunrise on the 14th of may, from the visible satellite. It's a bit strange that they are visible from space, they are 2-3 miles wide? Are they jet ...
6
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1answer
108 views

Can someone help me identify this cloud formation?

These pictures were taken today in Oklahoma City and I am both baffled and curious as to what formation this may be. I was wondering if anyone had any idea? Thank you!
5
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1answer
104 views

There are cloud identification guides, are there also (guided) rock identification websites?

Seeing all these rock identification questions, got me wondering, is there no straightforward guided rock identification website? In Intro to Geology lab, I remember going through a bit of a process ...
6
votes
1answer
278 views

What type of storm cloud is this?

We have had (and are still experiencing) waves of storms passing through this area of the central Queensland 'Capricornia' coast, Australia. This area is a subtropical coastal environment, close to ...
15
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1answer
742 views

What type of cloud formation are these dark low-hanging clouds?

I was thinking it could have been a non-rotating wall cloud, but I'm not sure. YouTube video Picture taken on September 9 2014... between 5-7 pm in North Georgia, about 40 miles north of Atlanta.
8
votes
2answers
449 views

What are these Gizmos at Izaña Atmospheric Research Center in Spain?

This tweet from the account of the Centro de Investigación Atmosférica de Izaña (AEMET) http://izana.aemet.es Izaña Atmospheric Research Center (AEMET) shows images of meteorological instruments ...
7
votes
2answers
1k views

What is this spaceship-shaped cloud?

This tweet from the European Space Agency (ESA)'s Spanish account show a striking photo of a round, flat, "space-ship-shaped" cloud in an otherwise completely clear sky. The stars are out so I assume ...
4
votes
2answers
85 views

Is it normal for a cyclonic storm to form at the latitude of New York, USA?

I am following climate activist Greta Thunberg's sail to N America from Europe on https://tracker.borisherrmannracing.com/. The model shows a cyclonic storm forming south of Nova Scotia, east of New ...
4
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1answer
60 views

Is there any possible way that a tropical cyclone of any strength could form over land?

Most tropical cyclones rapidly weaken over land, however, given some conditions (such as very wet soil/ground cover and tropical lower atmospheric conditions) they can sustain themselves or even ...
2
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0answers
38 views

Hypothetical: an immense disc blocks sunlight, how does this affect the weather?

I have a hypothetical situation, and I am specifically interested in how this situation would affect the weather. I have asked this question elsewhere, however I feel that nobody with any expertise ...
9
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1answer
4k views

What is the loudest thunder ever recorded (dB) at ground level and where did it occur?

Sound travels fastest through warm air and conditions such as temperature inversions can help to amplify the sound of thunder (source). Conversely, during a thundersnow event the falling, and ...
2
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0answers
42 views

Why did Hurricane Harvey have so much lightning associated with it?

Hurricane Harvey was a prodigious lightning producer when it hit Houston/SE Texas. But I thought hurricanes don't have much lightning (with the eyewall being the only exception), due to tropical ...
8
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1answer
1k views

Continuous lightning for over an hour; is this phenomenon common and does it have a name?

A few months ago, I witnessed something off the coast of Florida that I have never seen in my life. From my apartment, from about 10PM - 12AM, I saw pretty much continuous cloud to cloud lightning. I ...
2
votes
1answer
94 views

Why during subsidence inversion, upper layer warms more than lower layer?

Source : weather.gov This is mentioned in the book I have been reading regarding stability in atmosphere. But I am not able to pin point exact reason behind this. "As the layer subsides, it ...
82
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3answers
27k views

Impossible or improbable? Hurricane crossing the equator

No known hurricane has ever crossed the equator. Hurricanes require the Coriolis force to develop and generally form at least 5° away from the equator since the Coriolis force is zero there. Are ...
4
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1answer
1k views

Does ground-to-cloud lightning create crystals as well?

I've read that cloud-to-ground lightning can create fulgurites. Does ground-to-cloud lightning also create crystals within the earth as it surges through the minerals?
15
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3answers
11k views

How far away can you see a thunderstorm?

At 9:30 PM on July 13, 2015, I was looking due south from Oshkosh, WI. I saw very clearly a large storm with 1-2 lightning strikes per second. I could see cloud-to-cloud lightning traces, as well as ...
1
vote
1answer
36 views

Historical isobaric charts?

I am looking for a small-scale isobaric chart, which encompasses central Africa. I am interested in the time span of the past few months. Do you know where to find it? Thanks
2
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1answer
110 views

Interpolating world data to a local grid in Python

I have an NC file that has global data with a high resolution (about 25 minutes) so a lot of coordinates. I have some measured values of some region with irregularly spaced coordinates. In order to ...
0
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0answers
82 views

Moisture flux convergence/divergence calculation in Grads

I want to calculate moisture flux divergence/convergence in 850 hpa for the summer and I have monthly mean gridded data sdfopen shum.mon.mean.nc sdfopen uwind.mon.mean.nc sdfopen vwind.mon.mean.nc ...
2
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1answer
37 views

Discrete distribution of daily rainfall [closed]

How can I estimate the rainfall rate every ten minutes during a day having the total amount of rainfall during that day ?
0
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1answer
28 views

Does the feel of temperature change, when you're in two different places [duplicate]

I'm from Baltimore Maryland. And our summers can be very intense sometimes a heatwave could put us at 100 degrees and with humidity it could feel like 110 degrees. Now, I have friends from the U.S. ...
2
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4answers
171 views

What is the difference between dew and rain?

What is the main difference between dew and rain? Would it be correct if we say that rain is done in the upper troposphere while dew done in the lower troposphere? Or there are better definitions for ...
7
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3answers
1k views

Could Global Climate Change increase the average moisture in the air?

Given several hundred years, assuming global climate change results in the melting of the polar ice caps which leads to an increase in surface area of the oceans and an overall warming of the earth (...
2
votes
1answer
43 views

Atmospheric conditions needed that blocks all bright light during sunsets and allows you to stare directly at the sun

Today (July 5th, 2019 just before 8 pm KST), along the Han River in Seoul, the surface of the sun could be viewed with my naked eye (no protection needed), and this was safe on the eyes. It appeared ...
3
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1answer
68 views

What is the physical meaning of second moment of wind velocity?

I have been reading some documents about meteorological data and many of them mention the second moment of wind velocity. I guess it has to do with the way the wind is changing but in such case I ...
2
votes
1answer
148 views

Presence of Diabatic heating term in the continuity equation

The tropical circulation paper by Gill (1980) approximates vertical velocity as the sum of pressure and diabatic heating terms (equation 2.5 at page 449). Since the pressure is already a function of ...
1
vote
1answer
78 views

When and where is the atmospheric greenhouse effect strongest?

Is the greenhouse effect stronger in the ice covered area or in the equator? Also is it stronger during winter or summer? I am thinking it is stronger in the Ice covered area and during winter because ...
7
votes
2answers
269 views

What are good metrics to compare climates?

I'm interested in visualizing climate data across the conterminous U.S. to determine regions that I would be interested in living in. So far, I've pulled in NOAA data, and I've: averaged the maximum ...
2
votes
0answers
41 views

Application of vorticity tendency equation

I have a question about the dynamics of westward propagating vortices. In meteorology, the vorticity tendency is often used to explain the westward propagation of vortices (cyclonic circulation). A ...
3
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1answer
175 views

What is the synoptic/atmospheric setup that is causing the U.S. severe weather outbreak in May 2019?

I asked this in the chat and it was suggested I ask on the main site. There's been a seemingly perpetual severe weather outbreak over the central and eastern U.S. over the past two weeks. Killer EF3s ...
1
vote
1answer
60 views

Do cloud formations change depending on the season?

I'm currently working on some software for cloud masking, and thus far I have only been using satellite data as recent as spring (northern hemisphere). However, I'm wondering if cloud coverage or ...
4
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0answers
37 views

Oscillating dew point throughout the year?

I was searching for the climate of Saudi Arabia and I noticed that the city of Abha (altitude of 7000 feet) has a "strange" behavior in its dew point, as numbeo suggests: https://www.numbeo.com/...
0
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0answers
25 views

Do less trees equal less rain? [duplicate]

It is said the the Sahara desert was once a dense forest until it was cut. Do trees contribute to precipitation and less trees equal less rain locally?
3
votes
1answer
49 views

Get atmospheric pressure values through JavaScript

I'm working on a programming project in which I want to show isobars on a map with OpenStreetMap and the HTML tag canvas. The main problem that I'm facing is the dificulty of retrieving consistent ...
1
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0answers
48 views

Thermal likelihood formula

Background: I use the X-Plane flightsimulator for flying and gliding. In the program we have real weather (clouds, winds, etc...) but thermals are not well implemented, they don't have any connection ...
2
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0answers
42 views

Are there more meteorological catastrophic events due to climate change?

I was told by a sedimentologist there is no evidence of more climatic catastrophic events at the geological register previous to Pleistocene, when climate was warmer. My question is if meteorologists ...
6
votes
1answer
85 views

What is brown carbon?

There is a lot of interest in brown carbon in the atmospheric science community these days. There is a paper in the journal, "Atmospheric Chemistry and Physics" titled, "Black carbon or brown carbon? ...
0
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0answers
23 views

How does a change in the tilt of the Earth effect climate? [duplicate]

Could the Earth survive if the axis was less or more of the tilt of that what it is now, and by how much? How would the Earth act if the axis was pushed to an extreme tilt or lack there of?
6
votes
1answer
140 views

Do Siberia and Canada have a rasputitsa?

The rasputitsa is a muddy season that happens twice per year in West Russia, Ukraine, and Belarus. It happens in mid-October to late November due to rains, and mid-March to late April due to thaws (...
4
votes
1answer
47 views

What exactly are “ambient aerosols”?

I see this term being used everywhere, but I have not been able to find a formal definition for "ambient aerosols".
5
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2answers
68 views

Can I interpolate rainfall data from stations outside of watershed for the watershed?

I have only few station inside the watershed so I want to use the stations outside if I can to get better results
3
votes
0answers
66 views

Initiation of Rossby waves during MJO

I am trying to understand the basic dynamics of MJO, where I find several studies which relate it to the initiation of equatorial Rossby and Kelvin waves. Though MJO is an eastward propagating wave, I ...
4
votes
1answer
144 views

Why is potential vorticity so emphasized in technical work, but often neglected in maps on weather websites?

When I was first introduced to potential vorticity, I was told that it is a very important tool for meteorologists to learn. Sure, it solved a simple problem in dynamics, but it wasn't apparent to me ...
2
votes
0answers
85 views

Characteristics of saddle points in stream line charts

I am trying to locate saddle points or commonly known as "col" in synoptic meteorology. This is "z" in the following figure. References Here are some of the references regarding this. a). http://www....
16
votes
1answer
5k views

What do quasi-geostrophic and ageostrophic mean?

I know that geostrophic flow means straight wind flow that is balanced by the pressure gradient and Coriolis forces. But what do quasi-geostrophic and ageostrophic mean specifically?
1
vote
1answer
66 views

How big of an event is needed to trigger a long winter?

Could a small meteor or natural nuclear explosion melt an ice cap on Earth to trigger a mini ice age without the event being observed by people? Can the Earth have an overlaying thermal cycle that ...
1
vote
0answers
93 views

Does this weather pattern have a name?

The past few weeks of spring in northern Ohio I believe I have noticed a weather pattern where the weather forecast will show a string of days with rain, but what happens is the day is mostly clear, ...
7
votes
3answers
452 views

Algorithmically Determining the Rainy Season

I have historical precipitation data for hundreds of cities around the world. I would like to algorithmically determine when the rainy season (if exists) is for each location. Are there any algorithms ...
-1
votes
1answer
103 views

How to improve this prediction about the climate in future?

The more carbon dioxide in the atmosphere the more global warming. The more global warming the more cloud formations that cool the earth and clean the air from carbon dioxid when rain- and snowfall, ...