# Talk:History of numerical weather prediction

This page was created out of the content of the Numerical weather prediction article, so we could reduce historical content within that article per FAC comments.  Thegreatdr (talk) 14:25, 16 February 2011 (UTC)

I don't have a citation handy for this, but CMC's first global model was its spectral model in 1991. Prior to 1991 the spectral model was run in hemispheric mode. In 1994 the global spectral model was replaced by the global GEM model, as per the citation in the article. Y. Pelletier, CMC  — Preceding unsigned comment added by 205.211.133.128 (talk) 19:24, 26 July 2012 (UTC) 

We'll need a citation in order to add any of this information into the article.  Thegreatdr (talk) 23:59, 26 July 2012 (UTC)
Hello again - I can confirm the first fully global model run at CMC was the SEF (Spectral Éléments Finis) implemented March 12, 1991. Here is the citation: H. Ritchie, 1991: "Application of the semi-Lagrangian method to a multilevel spectral primitive equations model", Quart. J. Roy. Meteor. Soc., 117, 91-106.
Thanks!  — Preceding unsigned comment added by 205.211.133.128 (talk) 13:49, 27 July 2012 (UTC)
It's me again, Y. Pelletier. After scanning the article I cited, I see it does not explicitly mention the SEF model (although the article was the basis for the changes to the model). I do know the 1994 date is inaccurate... I confirmed 1991 with various sources at CMC. I'll keep trying for a citable source...  — Preceding unsigned comment added by 96.20.160.129 (talk) 21:59, 27 July 2012 (UTC)


### Citation for 1991 implemetation of global model at CMC
H. Ritchie and C. Beaudouin, 1994:"Approximations and Sensitivity Experiments with a Baroclinic Semi-Lagrangian Spectral Model", Mon. Wea. Rev., 122, 2391-2399
Near the beginning of page 2395 it says that "Optimizing and multitasking this semi-Lagrangian spectral model enabled it to respect the operational deadlines at the Canadian Meteorological Centre and be implemented as the global data assimilation and medium-range forecast model on 12 March 1991".  — Preceding unsigned comment added by 205.211.133.128 (talk) 15:19, 30 July 2012 (UTC) 

Hello Editors,
The first operational Canadian limited area (regional) model was the Regional Finite Elements model (RFE). The RFE was abandoned in favor of the variable resolution GEM model and later the piloted GEM LAM. According to the following linked article, the RFE was implemented at CMC on 22 April 1986 : http://journals.ametsoc.org/doi/abs/10.1175/1520-0493(1989)117%3C1726:IOATBL%3E2.0.CO;2
Yves Pelletier  — Preceding unsigned comment added by 205.211.133.128 (talk) 13:53, 13 May 2015 (UTC) 

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Ditto here in regards to updates being needed for changes since this GA passed. Will be sent to GAR if not resolved. Noah, AATalk 13:53, 1 February 2024 (UTC)

Ok.  Since you’ve researched the topic, what do you think is missing?   Thegreatdr (talk) 22:18, 7 February 2024 (UTC)
Im not sure on everything but I am specifically aware that global ensembles have been upgraded quite a bit like the ECMWF for example. I am also aware of upgrades that have been made to tropical cyclone forecasting models such as the GFS and new models have been added to the mix. The improvements here have likely contributed to the increase in accuracy. I would have to look into the other topics to see what would be involved for them but I would assume they have had advances in the last 10+ years. There's also some journals here that detail some more recent advancements in numerical weather prediction in general. Noah, AATalk 00:07, 8 February 2024 (UTC)