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Global Forecast System
1
vote
How do I convert a latitude/longitude coordinate to a NOAA GFS grid cell location?
(GFS time steps have always been a mire... but based on this full list of data files and the info page previously given, it indeed appears the data provided here is just every 3 hours for the first 10 …
1
vote
upper air data(observation) and analysis step for GFS model
You are right that upper air soundings are typically only done twice a day, and even at quite a coarse observation spacing.
And that upper air data is definitely very important in models.
I'd sugges …
1
vote
Where can I find archived NAM/HRRR model runs?
You may be able to find success for the HRRR at either CHPC U of Utah or via Amazon Web Services (if I remember right, AWS typically has data access charges that you may be able to get around for acad …
4
votes
Accepted
How to find the altitude above mean sea level of the wind in forecast data such as GFS
It makes sense, some locations have a surface pressure under 1000 mb... which means to get to 1000 mb you'd have to go below ground (the basic idea of the calculation is that pressure decreases as you …