Questions tagged [wind]

The flow of air with respect to the ground. On the surface of the Earth, wind consists of the bulk movement of air.

Filter by
Sorted by
Tagged with
13
votes
1answer
1k views

How big does a lake have to be to have its own Sea Breeze?

How big does a body of water need to have a sea breeze? Is there a chart on sea breezes wind speed that include lakes? Could a circular lake create enough sea breeze to create a wind vortex in the ...
4
votes
1answer
41 views

What is an 'obstacle vista diagram'?

Currently I do some research about SODAR and at this paper, the author wrote (p. 1502f): A site should be relatively clear of obstacles that could act as potential fixed-echo reflectors. If that ...
1
vote
0answers
97 views

What would happen to the Subtropical Ridge/Horse latitudes and Polar front if the Earth was rotating 5% faster?

Would they move towards the Equator/Poles? Stay in the same place? What about if the Earth was rotating 10% slower? Is there a rotation speed for Earth which will lead to 4 wind belts instead of 3 ?
3
votes
0answers
68 views

why does Earth have three wind cells instead of just one? [duplicate]

I wondered what causes three wind cells on earth -Hadley Cells, Ferrel Cells, and Polar Cells, instead of just a one big cell from equator to the pole? I'd like a straightforward, intuitive ...
7
votes
1answer
204 views

What wind forecast datasets are available for forcing a wave forecast model?

I am trying to set up a spectral wave model for waves forecasting in the Mediterranean. I need the meteorological forecast for this region. I am aware of the ECMWF datasets. But unfortunately, only ...
5
votes
1answer
302 views

Why does wind blowing against a strong current create way bigger waves?

It's a well known fact that wind will cause very big waves if blowing against a strong current, for example in the gulf stream off the US coast, or in the bay of San Francisco with a very strong (5 ...
0
votes
1answer
144 views

Does being in the air provide any protection from an asteroid?

How does radiation and shock waves from a radioactive asteroid or atomic explosion disperse throughout Earth's atmosphere? Are there specific areas on Earth that are less likely to receive the shock ...
1
vote
2answers
475 views

What is the highest balloons possible in a chain?

The BU60-1 balloon attained an altitude of 53.0 km (32.9 mi; 173,900 ft). Weather permitting, would a series of climbable balloons in a chain be able to be linked from the ground to that height of ...
4
votes
1answer
345 views

If a prevailing wind traveled due east in the Northern Hemisphere, would the Coriolis Effect act on the water?

I am in a Marine Environmental Science II class, and we are discussing the Ekman Spiral. As I understand, the Coriolis Effect does not occur when whatever is observed does not change latitude. So, if ...
2
votes
1answer
105 views

Are high velocity winds, or the lack of wind, the most common cause for low visibility?

Low visibility, say <1km (3300 ft), can be caused by fog when there is no/little wind present. On the other hand, high winds associated with blizzards or wildfires can also create low visibility ...
4
votes
0answers
51 views

Want to buy wind speed sensor, small, cheap [closed]

I want to build a small atmospheric sensor setup that will include an anemometer. It doesn't have to be especially accurate but should be small, lightweight and reliable. The part I'm missing is the ...
2
votes
0answers
33 views

Why is wind sporadic in a Boston northeaster?

We are having a tough little northeaster in Boston, USA, right now and one oddity that I notice is the wind pattern. There will be complete calm for 3-5 minutes, then the wind will blow hard in gusts ...
2
votes
0answers
102 views

Why do nearby thunderstorms move in different directions?

The image below from the Australian Bureau of Meteorology shows several thunderstorms in southeast Queensland today and the directions they are expected to move. I'm surprised how different these ...
3
votes
2answers
76 views

Looking for fun and illuminating weather visualizations

I'm looking for illuminating and fun weather data visualizations like e.g. EarthWindMap. More specifically, I was hoping to find wind vectors overlayed onto a prognostic chart to visualize how the ...
1
vote
2answers
17k views

What wind speeds and gusts can usually damage houses or trees?

In my region wind speed increases in Autumn. It reaches to 30 km/h with gust up to 40 km/h. I want to know at which speed the wind and gust can cause small damage of the normal window glass (We mostly ...
3
votes
1answer
168 views

Wavewatch III data

I need to simulate some ocean data on the south coast of France, near to Marseilles. Ideally I am looking for parameters such as wind direction, wind speed, significant wave height, peak wave period ...
0
votes
1answer
1k views

Prevailing winds between 30 to 60 degrees latitude [duplicate]

Prevailing winds are generated by Coriolis effects. I think I understand why NE winds are the prevailing winds in 0 to 30 degrees and 60 to 90 degrees latitude in the northern hemisphere (e.g., ...
12
votes
4answers
6k views

Do hurricanes cool the earth?

I noticed that temperature drops in the surrounding area of a hurricane. Is the heat converted into kinetic energy? Could the shape of the hurricanes reflect sunlight? Do they create more lightning ...
3
votes
1answer
180 views

Is there a table available for the maximum potential intensity of hurricanes?

The maximum potential intensity (MPI) is a computed quantity that often sets a maximum bound for maximum hurricane wind speed, though rarely, the wind speeds observed can exceed it. MPI is based off ...
4
votes
1answer
82 views

How does wind cause large waves?

I was just wondering about the large waves associated with storms. It seems a little counter-intuitive that large masses of water can be put into motion by moving air (which is much lighter than water)...
0
votes
1answer
218 views

How to make wind forecast like Predictwind.com? Which mathematical model has been used?

PredictWind.com is able to make wind forecasts on a very precise 8 km scale. For educational reasons I would need the mathematical model used or at least one very similar. Searching on the internet I ...
5
votes
1answer
554 views

Depth of the wind-induced currents and the shoreline

In the open sea the speed of the current in the developed sea can be estimated as 3% the wind velocity at 10 meters. Why is ocean surface velocity around 3% of wind velocity? Is there a similar ...
3
votes
2answers
2k views

Plotting wind barbs in python (no U,V component)

I've got 4 different .txt files for longitude, latitude, wind speed and wind direction (so no U and V components of the wind). Is there any way to plot wind barbs from such a dataset?
5
votes
1answer
895 views

How to make, read, and calibrate a ping-pong ball anemometer?

I'd like to make a ping-pong ball anemometer to make estimates or approximate measurements of wind and surface air currents at low to moderate speeds. I don't own an anemometer now, but I'd estimate ...
2
votes
1answer
41 views

How to simulate wind's trend from his windrose distribution?

I need to simulate a realtime wind's trend from his windrose distribution (made from statistical data). How winds change direction and speed in function of time? I cannot pick a random value from ...
4
votes
1answer
136 views

Can we extrapolate wind speed data to higher altitudes?

I have some data (GRIB layers) about wind components u and v, which I would like to use to estimate wind magnitude and direction. But the model says it is for 10 m altitude. Is there a way to ...
7
votes
2answers
8k views

What is the definition of wind gust?

I'm currently building a weather station from scratch. It measures temperature, pressure, humidity, wind speed and direction. The end result shall be a weather station that sends out METAR weather ...
5
votes
1answer
112 views

The grains of the parabolic dunes

My text book says that parabolic dunes consist of consolidated limestone grains, but I wondered if they have sand grains too, so I googled this issue and found that they consist of sands, but I am ...
5
votes
1answer
76 views

How do these cloud forms grow?

What conditions would cause these windswept clouds at sunset in Michigan? Do these cloud forms have a name?
2
votes
0answers
510 views

Do U & V vectors differ depending on GRIB layers (wind vs current)?

Essentially I would like to know how current direction "DIR C" and wind direction "WDIR" for gribs is computed. I'm trying to compute some angles from u and v vectors in grib files. My understanding ...
3
votes
2answers
1k views

Wind direction data

I'm trying to validate some work I've been doing on extracting wind direction measurements from data. Where can I access historical wind direction data online that gives ~hourly measurements? ...
5
votes
3answers
8k views

Is it less windy in a valley than on a hill?

Assume we have a mountain landscape without trees. Would it be less windy in a valley than on a hill, or would the wind just be the same? Or in other words, which of the two images below describe ...
7
votes
1answer
1k views

How to calculate w-wind?

My model (AGCM) does not compute w-wind (the vertical component of the wind velocity). However, I do have the following available variables from AGCM output: ...
2
votes
1answer
6k views

How to identify low or high pressure area

If rain is due to the flow of humid air from a high pressure area to a low pressure area, without the use of devices, technology or mass media is it possible to detect regions of high or low ...
0
votes
2answers
757 views

Other than the South Pole where is the windless place on Earth?

For this other question "Would this chambered cylinder be possible", preferably near the equator where is a calmest place from the troposphere to the stratosphere where is the windless place one Earth ...
2
votes
1answer
192 views

Why is the Atlantic anticyclone an area of high pressure if it's the warmest spot on the planet?

I am taking a navigational course and part of it is about meteorology. There is one thing which is, although obvious, quite hard for me to grasp. Looking at a global weather map like this: https://...
1
vote
1answer
105 views

Wind speed, precipitation, extreme daily precipitation

I am trying to figure out what type of precipitation lifting mechanism occurs in a area that is unknown but I know some facts about the climate. So I know that there are 4 precipitation lifting ...
2
votes
1answer
506 views

Determing whether an area is Inland or Coastal

I have determined an area to be along the coastline just from looking at its climagraph. Its temperatures only range from -10 to 21 so there is not a large range of temperatures because it is being ...
6
votes
2answers
5k views

What is (negative) wind stress curl?

I'm currently doing research for a paper in school where we need to research on a university-like level. When I read the paper Causes and impacts of the 2014 warm anomaly in the NE Pacific, I found ...
4
votes
3answers
586 views

Why would Earth have stable weather patterns if it stopped spinning and vigorous weather if it had a much faster rotation?

According to https://www.youtube.com/watch?v=nH3bmG-KjvU, Earth would have stable weather patterns after it stopped spinning and according to https://www.youtube.com/watch?v=QHwLopLUrB8, Earth would ...
4
votes
2answers
782 views

Is wind just mainly nitrogen particles moving in one direction?

The air is composed of mainly nitrogen. Therefore, when you feel wind, is it mainly nitrogen particles hitting you that, on average, are moving in one direction?
-2
votes
1answer
2k views

What is the difference between w-wind, vertical p-velocity and Omega?

I am wondering the difference between w-wind, vertical p-velocity and Omega. I understand that all represents the vertical profile of Wind, but then why do we use these three different terms?
7
votes
1answer
4k views

Why does wind blow offshore in the morning?

I live in San Diego, CA, and surfers capitalize on dawn hours because the offshore (seaward) winds help "hold up" the waves, i.e. prevent them from crashing before the surfer gets to ride it a while. ...
1
vote
1answer
113 views

How does vertical wind change over time?

My question is about how vertical component of wind may change over time; in particular, as I am interested in simulating the effect of vertical wind on flight mechanics, I'd like to know whether I ...
4
votes
1answer
77 views

Is there a concise industry standard way of displaying wind speed, gust and direction?

I'm writing a smart-watch watch-face app with weather details. Since it's on a 1"x1" screen, I'm trying to keep all information as compact as possible. I'm using open weather map for my testing, and ...
3
votes
1answer
225 views

CFSR hourly surface wind time series

I am looking for hourly surface wind reanalysis data for the past two years. I am looking at the CFSR/CFSv2 data accessible from UCAR: http://rda.ucar.edu/datasets/ds094.1 The 6-hourly products are "...
8
votes
2answers
871 views

Long-term Wind Speed Forecasting: reality or wishful thinking?

I have been studying/working with Wind Energy for a while and, one of my main responsabilities right now is to search for adequate long-term wind speed forecasting models. However, 2 things strike me ...
2
votes
1answer
110 views

How are wind speeds typically distributed?

What probability distribution do wind speed measurements typically follow? I have seen a Weibull distribution used, but the page was a bit lacking on background information so I would appreciate ...
3
votes
2answers
109 views

How does the air-circulation in the lower stratosphere look like?

I would like to simulate the trajectory of a weather balloon in an altitude of 12 to 20 km. For this I would like to know how the velocity-field (i.e. wind-speed and direction as a function of ...
7
votes
2answers
2k views

Help interpreting a wind rose diagram

Can someone comment on technical explanation of the wind rose attached? I can understand the wind is blowing between WNW & SSW with speed of 7-11 km/h. For frequency of 11-16 km/h its blowing ...