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12 votes
Accepted

Predicting rainfall with governing equations

The Barotropic vorticity equation is insufficient to model rain. Part of this is due to the word 'Barotropic,' which indicates a lack of thermal gradient. The other reason is that while vorticity is a ...
BarocliniCplusplus's user avatar
8 votes

How do spectral methods work in the context of numerical weather prediction models?

Presume that the atmosphere can be modeled with waves of different frequencies. Therefore, the atmosphere can be written as a series of sine and cosine functions with different frequencies and ...
BarocliniCplusplus's user avatar
8 votes

Predicting rainfall with governing equations

TL;DR: Global NWP models such as NCEP's GFS (free access) and ECMWF's IFS (restricted access) provide forecasts at a horizontal scale of a few tens of kilometers every few hours. Starting from global ...
Nerevar's user avatar
  • 81
5 votes

Predicting rainfall with governing equations

You could look further into how currently used weather models actually work. If you want to do a prediction you will have to run a model which is not just as simple as your question would imply. There ...
Communisty's user avatar
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2 votes
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How spatial resolution of a NWP model works?

Yes, the deterministic GFS model (one model) has higher spatial resolution than the GEFS models (31 models). That is, that the latitude and longitude of the entire world is incremented by 0.25° in the ...
BarocliniCplusplus's user avatar
2 votes

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

A good rule of thumb for down-scaling with WRF is not to interpolate down more than 3 or 4 times; with 3 being the standard recommendation. So while 18 km is probably overkill for an outer domain (...
Mike Kavulich's user avatar

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