Questions tagged [weather-forecasting]

Questions about the application of weather data in meteorology/forecasting.

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3
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1answer
89 views

How long does it take to refresh the entire water supply in the Earth's atmosphere?

Water in the atmosphere is present as vapour, liquid and ice. It is just a small amount of the Earth's total water supply. I'm wondering how long it will take to rain down all the water from the ...
3
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1answer
573 views

How to calculate 3-hour flux values in ERA-Interim?

Referring to the post: https://www.myroms.org/forum/viewtopic.php?f=30&t=3003 I understood how to calculate the slhf and sshf for 03, 06, 09 and 12 time steps. But I have values for 00, 15, 18 ...
3
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1answer
67 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 ...
3
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1answer
63 views

On what basis are hurricanes,cyclones or typhoons named? [duplicate]

now its well known that common names are used to name weather storms but on what bases are they named ? is it the person who first notices them ? Is it the the most common name in the region where the ...
3
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2answers
68 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 ...
3
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2answers
211 views

How much is Solar Radiation effected by Axial Tilt or Obliquity?

I know that the Axial Tilt of Earth is about 23.4° - 23.5°. And I would like to know how much this change effects Solar Radiation for particular geo-location. What is the Axial Tile change rate? How ...
3
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1answer
521 views

How to properly setup a domain in NWP model (WRF) according to meteorological input data

I want to setup a mesoscale weather prediction model (WRF or something else) to work with NCEP/GFS meteorological input data with resolution of 0.25deg. My question is how to choose a proper size for ...
3
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0answers
94 views

Difference between GDAS and GFS data

What is the exact difference between GFS 0.25 and GDAS 0.25 data which is available in http://nomads.ncep.noaa.gov/. And are the GFS 0.5 and 1 degree data available in the above url and here the same?...
3
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0answers
40 views

Will global Warming continue to produce winter storms in the Northeast US?

Will GW just cause more winter storms in Northeast US or will all of US have colder winters ? This winter in East TX we had three record cold snaps and I lost a lot of Camellia Japonica buds and ...
3
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0answers
23 views

What 3-day smoke forecasts are height-resolved?

In order to accurately perform weather forecasts during large wildfire events, weather models must include the smoke. Smoke reflects sunlight back to space, decreasing the light absorbed by the ...
3
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0answers
350 views

Learn weather forecast

Is there any website for videos/articles that explains how to read maps or other graphics use to make forecast prediction (more advanced than the weather channel please) ? It could be about any ...
2
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2answers
318 views

What is are the benefits of map 500 hPa geopotential for weather forecasting?

From the weather forecasting perspective: what is the main reason for showing just map of 500 hPa geopotential? Are there any practical or theoretical reasons? Why do not show 600 hPa geopotential or ...
2
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2answers
112 views

Can you have a low pressure with no clouds?

My understanding is that low pressure is usually associated with cloudy skies, however in the last week I observed a day that had low pressure reading but no clouds. Is this possible or did I perhaps ...
2
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3answers
1k views

Do high pressure systems draw air towards them?

I refer to the this very recent article, which quotes Andrew Watkins (Manager of Climate Prediction Services at the Australian Bureau of Meteorology). My understanding has always been that air flows ...
2
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2answers
524 views

How do I convert a latitude/longitude coordinate to a NOAA GFS grid cell location?

Looking at this GFS http://nomads.ncep.noaa.gov:9090/dods/gfs_0p50/gfs20170707/gfs_0p50_12z.ascii?tmax2m[0:2][124:128][279:283] The range defined by the second and third set of brackets specify the ...
2
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1answer
342 views

upper air data(observation) and analysis step for GFS model

Global forecast systems(GFS) gives analysis and forecasts at different time steps. Their main source of input is upper air data which is recorded only twice in a day(observation comes at 00 and 12). ...
2
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1answer
361 views

How can I learn to make mesoscale/synoptic analyses of major weather events?

With the tornado outbreak in southern Georgia and northern/central Florida on Sunday that has tragically resulted in significant loss of life, eyes are once again on the weather. I was particularly ...
2
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0answers
31 views

Night sky visibility prediction [on hold]

Given a location (e.g. Osoyoos, British Columbia) and human eyes only, what's the ranges for the nights of the year most likely to give clear astronomical viewing? What historical data sources might ...
2
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0answers
50 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
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0answers
185 views

Average life span of a hurricane

Wondering if there's data of what could be the average life span of an hurricane considering global warming as factor.
2
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0answers
308 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 ...
2
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0answers
48 views

What kind of storm tracks produce snow in the eastern United States?

What storm tracks are favorable for snow in the eastern United States? Articles like this one on a winter storm in the Northeast in 2011 indicate that storm tracks are important in snowfall amounts. ...
2
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2answers
112 views

Global warming and winter temperatures

What causes cold temperatures to move earlier than they usually move? Here in Buffalo the weather was 9 °C. However, everyone had winter coats and hats on. There was no snow, but it was very very ...
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3answers
286 views

Websites providing visual weather data

What websites are there providing visual weather data? The question actually contains the past and future weather. The purpose is for this question is to provide a list of easy-to-access websites that ...
1
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1answer
73 views

Why don't they give hurricanes uncommon names?

So people with common names don't have to share names with a destructive hurricane.
1
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1answer
465 views

Weather forecast based on pressure, temperature and humidity only (for implementation in Arduino)

I have a project for my school to make, and I'd like to have some materials of research/graphs of dependencies about how the weather is predicted (i.e. cloudy, sunny, rainy). I've been searching the ...
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2answers
259 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 ...
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1answer
39 views

Clouds altitude

I'm amateur photographer and professional programmer and I'm trying to create an application to predict exceptionally beautiful sunsets (something like https://www.flickr.com/photos/photogtom43/...
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1answer
64 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
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1answer
117 views

How can I implement a visualization of archived convective data from numerical weather models?

I've always found geographic visualizations of surface/mixed-layer CAPE models and other weather data to be incredibly interesting. Here's a map featured by the Capital Weather Gang over at the ...
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1answer
94 views

Could a large burst of super-heated or super-cooled air cause tornadoes to fall apart?

We know how tornadoes form: when areas of hot air and cold air mingle, causing rotation. We can even see them form on the radar. Yet, for all of our technology, we can't stop such events from ...
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1answer
50 views

How to predict when the pressure will change

For example, on windy.com I see that there is a high pressure area to the west of Washington in the Pacific Ocean. What heuristic techniques could I use to guess if the high pressure area will migrate ...
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1answer
47 views

Where can I get good raw meteorological data for Middle East?

I live in the Middle East and I am really fond of understanding meteorology and using raw data make my own weather predictions. However, a limitation I encounter here is that most raw meteorological ...
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1answer
272 views

Why do tropical cyclones get more attention than extratropical cyclones?

For tropical cyclones we have carefully tracked every instance of them, and naming them as soon as they have reached a certain intensity... flying aircraft in to measure conditions... compiling ...
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1answer
78 views

Human hurricane forecasting?

I'm referring to an article I've read on Ars Technica about the differences in various weather models. One thing that stood out for me was a mention of Forecast models typically show their skill ...
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2answers
840 views

How to calculate air temperature for given time, location and altitude?

I would like to calculate (estimate) air temperature at given time, location and altitude. All I have is air pressure for 20°C. The formula based on NTP (Normal Temperature and Pressure) to calculate ...
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0answers
40 views

Forecast accuracy in different climate types

Which climate is easier to be predicted. In other words. Which climate forecast results better accuracy? Is there any climate more convenient to be predicted? Is there any paper concerning this topic?...
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0answers
101 views

Sailing Around the World on a Jet Stream

An ultra light plane can stay in flight up to 2400 km (the World Record) with out an engine using thermal lift. Can a huge kite like airship (not a blimp) be built to indefinitely sail in and out of ...
0
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1answer
174 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 ...
0
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1answer
21 views

Local Weather Forecast (Self-Learning Algorithm)

First of all, the question! : Is it possible to predict local weather tendencies for the upcoming hours (let's say 2-3 hours) using only local data? If yes, which data is needed to make such ...
0
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1answer
31 views

WRF/Chem: Editing NetCDF (wrfchemi files) for own emissions

Does anybody here have any experience with editing wrfchemi outputs from the prep_chem utility so that I overwrite the file with my own emissions? I am knowledgeable in python, but I am not that well ...
0
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0answers
41 views

Why it doesn’t always rain with lightning and thunder when it’s hot [duplicate]

Thunderstorms happen after a period of warm weather. There are times though in the summer after it’s been warm for a while and even after it was 95 degrees Fahrenheit, the thunderstorms they predicted ...
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?
-1
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1answer
238 views

If Earth had rings would gravity exerted by Earth decrease?

If Earth had enough mass in its own rings, more than the weight of Earth: What could it decrease the gravity to? Would the atmosphere have more depth or be thinner? What would the weather be like? ...
-1
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1answer
236 views

Temperature Fluctuation in a Day

I was looking at the temperature plots in Nashik, India and noticed an intriguing trend. What could explain this trend? [screenshot from WeatherUnderground forecast] Shouldn't the plot be smoother? ...