Questions tagged [wind]
The wind tag has no usage guidance.
104
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1answer
54 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 ...
1
vote
1answer
35 views
Where can I find wave height/period, current velocity and wind speed/direction data at the Qiangzhou strait in China?
I'm looking for time series of wave height/ period, velocity currents and wind speed/direction specifically for the Qiangzhou strait in China.
Global data sets could also work.
2
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2answers
100 views
Temperature Advection using finite differences with gridded data
Advection of a scalar quantity, such as temperature (T), by the horizontal wind, is defined as follows:
$-\textbf{U}\cdot\nabla T$
where $\textbf{U}$ is the horizontal wind vector, $\textbf{U}=(u,v)$...
4
votes
1answer
90 views
How to strong winds cause baroclinic intensification in the upper ocean?
Below is an excerpt from The Biology of the Indian Ocean, Bernt Zeitzschel, Sebastian A. Gerlach
The more vigorous atmospheric and oceanic circulation during the SW
monsoon causes not only the ...
2
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0answers
26 views
What is the accepted measure for Wind Coherency (Strength and Direction)
I have wind data from a Met station (Speed and Direction), and I'm looking for a way to characterize a strong coherent wind.
AKA - Wind that averages 12 m/s out of the East for 2 days would have a ...
5
votes
1answer
130 views
Judging wind speed based on flags and inland-water observations
About a year ago, I took this video along the Hudson river in NY, and I'm trying to figure out the Beaufort number based on the water and the flags.
https://www.youtube.com/watch?v=nqjvTALRWW8
The ...
1
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0answers
22 views
Find True Wind from ship course and observed wind
Assume that I am sailing in a ship where I know the course of the ship & speed of the ship and observed wind direction & speed using Automatic Weather Station fitted on mast. I would like to ...
1
vote
1answer
307 views
If storms form above low pressure regions, why doesn't the eye of a hurricane, a low pressure region, have any storms?
If this is due to the Coriolis Effect, my other question would be how does the wind go upwards to form the storm clouds?
2
votes
1answer
58 views
Deep sea pumps that work on wind power, can they control the weather?
If they used wind power to bring up cold water from far under the ocean in the day time and spray it on prevailing winds going into land, could they make it rain more in arid regions? What weather ...
1
vote
3answers
96 views
At the same speed, is a tornado as dangerous as straight wind?
If we have a place with wind at a given speed, and a tornado at the same speed, are they equally dangerous, or the tornado is more powerful?
3
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0answers
104 views
Where on Earth does the wind only blow one way?
Is there a place on Earth that if the wind is blowing its only blowing (here is the twist) in the same direction from the ground to 53 km high?
3
votes
1answer
55 views
How would a particle travel in a hurricane?
How would a particle other then water travel in a hurricane? At what buoyancy or height would a small air born life preserver be safe from the ground in a hurricane? How fun would that be?
6
votes
1answer
98 views
Why is there no desert in Southeast China?
Arabia, Sahara and Southeast China and India all are on the tropic of Cancer yet Southeast China and India are not deserts. I know that India is not a desert because of monsoon wind which causes heavy ...
9
votes
2answers
1k views
Why do rivers sometimes travel down the opposite side of the mountains from where the rain happens?
My teacher explained that when wind coming from the ocean gets blocked by a mountain it makes rain on one side of the mountain, like in the image below. This rain leads to the creation of rivers.
(...
5
votes
3answers
1k 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
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0answers
49 views
For how long can the wind blow unabated on a “trade wind route”?
Take a specific point at sea level (less than 100 meters above it) on a "trade wind" oceanic route. For example, somewhere on Labrador-Ireland route, at roughly 50 degrees of latitude north. Let's say,...
2
votes
1answer
50 views
How is wind made [duplicate]
Everyone surely enjoys waves in the beach, but one question that has always been hovering around my head was about the wnd.
I have always been told that waves are formed by wind and all, but then ...
13
votes
1answer
523 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
40 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
75 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
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0answers
53 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
183 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
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1answer
190 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
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1answer
124 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
243 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
284 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
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1answer
87 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
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0answers
49 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
31 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
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0answers
83 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
64 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 ...
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vote
2answers
4k 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
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1answer
126 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
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1answer
816 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
3answers
3k 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
156 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
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1answer
68 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
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1answer
156 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
402 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
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2answers
1k 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
546 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
104 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
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2answers
5k 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 ...
4
votes
1answer
98 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
69 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
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0answers
289 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
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2answers
779 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? ...
4
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3answers
5k 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
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1answer
793 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:
...
