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.

Filter by
Sorted by
Tagged with
1
vote
1answer
251 views

How to interpret the negative (actual) evapotranspiration values?

I am exploring FLUXNET sites for actual evapotranspiration (ETP) data (I convert the energy balance closure-corrected latent heat to ETP). I am interested in the half-hourly data. During the night we ...
0
votes
1answer
124 views

Is the weather of Miami, Florida and the weather of Lagos, Nigeria the same

I've been to Lagos and it rains a lot sometimes overflooding but it's pretty sunny. I'm aware that it rains a lot too in Miami. Is the climate the same apart from Lagos being near Equator and ITCZ ...
8
votes
4answers
1k views

Do winds behave like waves?

Like a sound wave, there are compressed and dilated regions in the air. But do compressed regions also occur in winds. If one considers squalls, they feel like a compressed region of air. Perhaps they ...
19
votes
7answers
18k views

Why doesn't the 71% water of the earth dry or evaporate?

Perhaps a simple question, we know 71% of the earth's surface contains water as oceans. If Earth's age is 4.543 billion years, then I guess it should be decreased with drying or should have been dried ...
11
votes
3answers
366 views

Water on Mars and Earth

If water on Earth came from meteorites, why doesn't Mars have substantial water? What made it more highly probable on Earth than on Mars?
2
votes
3answers
158 views

Is a hotter climate making trees grow faster and have lighter wood?

I started thinking about this after seeing several articles about falling trees, in particular a few articles about very large trees falling in Los Angeles and New York City. Plus, just thinking about ...
3
votes
1answer
99 views

difference between different meteorological models

I need to work with historical weather data (temperature and precipitation), we use meteoblue.com. There (https://docs.meteoblue.com/en/meteo/data-sources/data-sources#data-sources) they write about ...
2
votes
2answers
296 views

Why is the weather in San Francisco so different from that in San Jose?

San Francisco has around 5 months a year of intermittent rain. San Jose, just 50 miles south and nestled between mountains instead of between waters, has perhaps only 1 month of rain. San Francisco ...
1
vote
0answers
58 views

Korea a lot colder than New England this year

Normally, here in New England we consider our weather to somewhat parallel Korea's weather. However, this year it seems to be much colder in Korea. They are having record lows while we are having a ...
3
votes
1answer
128 views

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

Hurricane Harvey (Category 4 hurricane, in August 2017) 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 ...
3
votes
1answer
588 views

What is the most optimal latitude on Earth for the generation of extreme maximum temperatures?

First question on this StackExchange, so here goes... Overall, reaching high temperatures is dependent on 2 factors: The (maximum) solar angle in the day. The greater the solar angle, the more ...
6
votes
1answer
80 views

What factor(s) could cause this sort of temperature increase, mid-night/early morning?

I am new to having a PWS (Personal Weather Station). I have not found any answers explaining why this sometimes occurs aside from explanations given factors that were not variables in my case (winds, ...
4
votes
0answers
103 views

Free historical weather data API

Where can I find a free Python API that provides historical weather data (temperature, rainfall)? I'd need data of an Italian city, at least with hourly granularity.
4
votes
1answer
115 views

What is a reasonable range of values for resistance to heat flux?

I am developing a simple parameterisation scheme script to predict surface temperature. The script calculates six heat fluxes including sensible heat flux using a resistance to heat flux parameter. ...
3
votes
1answer
86 views

How to measure global temperature?

people always talk about global temperature (such as the global temperature goal of 1,5 K) - but how is this value achieved? It seems to me that it clearly depends on where the measuring stations are, ...
8
votes
1answer
23k 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 ...
7
votes
4answers
3k views

Does the Coriolis Effect affect a wind from East to West?

I'm studying meteorology for a pilot license and there I was taught as a rule of thumb that wind at higher altitudes is approximately turned 30° clockwise to the wind on the surface due to the ...
2
votes
0answers
33 views

Is there an average year of weather across the United States?

I am interested in which year has the best representation of average weather across a large area, the contiguous USA. This is challenging since what was average in the Midwest might have been unusual ...
4
votes
1answer
140 views

Why does wind direction change in a front? [duplicate]

Plenty of answers answer the question that it happens but I can't find a good answer as to why the wind shifts during the passing of a front. For an extreme example see: (in Dutch, x is hours and y ...
6
votes
1answer
398 views

What is the explanation of using pressure units (hPa) to express height when dealing with wind speeds?

I am trying to understand how prevailing winds and jet stream currents are formed and how they are varying in speed and direction. When looking at different wind speeds at different altitudes on ...
1
vote
3answers
222 views

Over what distance can weather be assumed to be constant?

Good afternoon, I'm working on an application makes calls to a weather API for different coordinates across the United States. Instead of getting the weather at each and every point, I'm planning on ...
1
vote
0answers
34 views

What are the leading methods for temporally interpolating wind data?

Weather providers, such as GFS and ECMWF usually provide their data in 3-6 hour intervals. What would be the best method to interpolate between the intervals to get a good intermediate wind model? I ...
1
vote
0answers
17 views

Historical detailed rainfall recordings New Zealand

I'm wanting to know where/if I can find 2019 records of hourly rainfall in New Zealand particularly for November in Greymouth South Island
3
votes
2answers
102 views

Lightning activity day curve - why it has high and narrow peak?

Atmospheric potential gradient changes during the day, as different areas of lightning activity come under Sun. This illustration from "The Carnegie Curve" by R. Giles Harrison shows ...
3
votes
1answer
95 views

Why exactly did the use of Greek letters as names for Hurricanes happen the first place, despite the fairly obvious and predictable impracticalities?

The Washington Post article Hurricanes Eta and Iota brought disaster to Central America. Officials can’t retire their names. describes a complicated situation, aspects of which are: Eta roared ashore ...
3
votes
0answers
33 views

what elevation is top of southeastern US summer humidity/haze layer?

We're interested in purchasing a vacation lake house in the piedmont/foothills of North Carolina. In earlier summers there, when driving from the mountains home to lower (sub-1000ft) elevations, I've ...
2
votes
0answers
50 views

Subsidence Inversion

With minimal knowledge of meteorology I understand how a high pressure system might lead to an inversion that builds as a high becomes more established, but why doesn’t the subsidence layer ever reach ...
1
vote
1answer
60 views

Can a Humidity Differential move PM2.5 Pollution?

Observations There is a higher level of PM2.5 pollution outside of the house. Readings are in the 80-150 range due to wildfires. (PM2.5 levels determined by sensors in PurpleAir.com's sensor network) ...
1
vote
1answer
234 views

Why does the annual temperature range get bigger where latitude is higher?

Why does the annual temperature range get bigger where latitude is higher? Is it because of the ocean currents? Or is there any other factor that causes this situation?
10
votes
1answer
442 views

What are Atmospheric Rossby Waves and how do they affect the weather?

I've been researching Atmospheric Rossby waves but from the multiple sources I used they all seem to be in conflict. Some say Rossby waves are parcels of air moving from east to west due to the ...
4
votes
2answers
642 views

Desalination and Weather Impact?

I have a question I've always been curious about regarding the topic. As I understand it, the desalination process is that they take the salt water, create usable water from it and then salt sludge ...
0
votes
1answer
62 views

Vertical air speed

Assuming that the divergence varies linearly with the pressure between the surface (1000 hPa) and the tropopause (200 hPa). Can someone tell me how do we calculate the vertical speed on the pressure ...
1
vote
1answer
64 views

How do I find the temperature of the air mass, and how do I use a t-skew chart?

So the first problem I'm stuck on is this one: An airmass is moving down a mountain from point A to B. At A the temperature is -10 Celsius and the pressure is 890hPa. At point B the pressure is 1010 ...
3
votes
1answer
47 views

Horizontal momentum flux in the surface layer

Given the question below, how would the kinematic momentum flux be at the surface layer? For letter a, why would it be that way (positive, negative, or 0)? Based on the answer below: I’m not sure if ...
3
votes
2answers
196 views

What kind of climate could you expect in a mountainous area in a subtropical region?

More specifically, I'm trying to work out climate analogues for my farm. It's at 5200-6200ft in South India. My area is a bit too small for the Köppen Map to correctly reveal patterns. I'll be ...
2
votes
1answer
59 views

Recommendations for books on boundary layer Meteorology?

Does anybody have any recommendations on books tackling Boundary layer Meteorology? I've seen the book by Roland Stull and Arya, but are there any other more updated ones that are as good as these two?...
4
votes
0answers
79 views

Weather produced by symmetric cold core cyclones

I know that, although rare, there are symmetric cold core cyclones (with a few of them even having a shallow cold core). They encompass some occluded extratropical cyclones, some dissipating tropical ...
8
votes
1answer
1k views

Why is it colder in the mountains than at sea level?

I have heard numerous reasons why that is. I just want to know which one is right.
0
votes
1answer
92 views

Why do cold-core lows slope towards the cold air with heigth? How to show mathematically that wind intensifies with height in this case?

I understand that from the hypsometric equation, in a cold core low the pressure gradient must increase with height, because in the center the isobars will be closer together: quente = hot, frio = ...
1
vote
1answer
36 views

Can I average the two RMM values?

The RMM values are sometimes quite different. Can I average the values of RMM1 and RMM2 and use it as an index for MJO?
7
votes
1answer
789 views

Madden-Julian Oscillation (MJO) - How to interpret the index?

How the Madden-Julian Oscillation (MJO) index can be interpret? Let's suppose I have got an MJO index value of 0.6 in a given day, what this does mean? Does 0.6 represents a weak MJO? Data from ...
1
vote
1answer
146 views

Does the Columbia Basin, North Cascades and Idaho Panhandle/Clearwater get a lot of violent, rotating supercellular thunderstorms?

Every storm season, supercells erupt in Montana and Wyoming. Wayward cold-core setups can trigger supercells or even long-tracked strong tornadoes in the Columbia/Willamette Valley and the rest of SW ...
2
votes
1answer
93 views

How do upper-level cyclones and anticyclones affect surface level winds?

Take something like the Bermuda High, for instance. I drew a crude illustration of it. It steers hot, humid air from the Gulf of Mexico towards the east coast of North America. But upper level winds ...
3
votes
0answers
58 views

Has a hurricane ever crossed the Atlantic Ocean more than once?

I noticed that Paulette (2020) is still a named storm and is now approaching northern Africa and Spain. It is forecast to begin moving west again in the coming week. Has a hurricane / tropical storm ...
1
vote
0answers
45 views

In a mesocyclone, why does wind shear create a horizontal axis of spinning air?

Take a look at this picture. Moist updrafts interact with highly-sheared upper-level winds, which sets up a horizontal vortex. But why? What causes the air to be forced downward and to the right, then ...
2
votes
0answers
140 views

What will happen if the Greek letter names were exhausted for naming tropical storms?

The traditional list of hurricane names for the year goes from A to W, and, in the very rare occurrence that the W storm has formed and there is another tropical storm out there, then the Greek letter ...
3
votes
0answers
56 views

In the future, is the World Meteorological Organization going to allow Hurricanes Zeta, Eta, and Theta to exist simultaneously?

In the 2005 Atlantic Hurricane Season, we got all the way to Tropical Storm Zeta, which is the current record. This year we may very well surpass that. However, right after Zeta come Eta and then ...
7
votes
2answers
15k views

What are the differences between Climatology, Meteorology and Atmospheric Science?

Please explain the main differences between Climatology, Meteorology and Atmospheric Science. Thank you
0
votes
0answers
33 views

difference between climatology and meteorology only [duplicate]

Some basic differences are needed for children to understand only. The language should be simple enough so that any age understands for 5 to 99 or maybe 100.
1
vote
0answers
79 views

wrf_chemi file with 30 time steps

I creat wrfchemi file for my wrf-chem, my wrfchemi file has 30 time step, frames_per_auxinput5 = 30, 30, auxinput5_inname = "wrfchemi_d", auxinput5_interval_m = 60, 60, ...

1 2 3
4
5
21