There is at least one issue with this style guide which prevents me from writing a correct CSL style (it has to do with the use of "et al." in in-text citations and "and Coauthors" in the bibliography). There is some discussion on how to change CSL to make it possible though:

http://sourceforge.net/mailarchive/forum.php?thread_name=fbb7c5df0812120613p610a3bd2oc0a5e895240dab13@mail.gmail.com&forum_name=xbiblio-devel

As an aside, the style guide you linked to wasn't complete. Some addition info on the style can be found in some of the Authors' Guides on this page:

http://www.ametsoc.org/pubs/journals/index.html

more specifically the full Authors' Guide:
http://www.ametsoc.org/pubs/authorsguide/pdf_vs/authguide.pdf
and the Comprehensive Reference Guide:
http://www.ametsoc.org/pubs/refguide.pdf

+1

Looking forward to see American Meteorological Society citation style..

Many Atmospheric Sciences scientists are using LaTex to publish their work.. Zotero would give great flexibility to this community..

thx for the link. Since the style was not in the "Style Repository" list and since the request was already here, I thought not to duplicate the request, and simply support it here..

About LaTex, I guess little misunderstanding. Let me correct it: if Zotero would come up with an AMS style, it would be a great flexibility for those who does not want to use LaTex (i.e. MS Word users).. I didn't mean Zotero would be helpful writing writing with LaTex..

Also, LaTex and Word templates are given at AMS web page. If AMS can be persuaded to display a link to the "Zotero AMS style for Word" along with the Word template, that would further help spreading the word..

Below is a similar journal and the differences..
Thanks a million in advance for the time and the effort if anyone can help.


Style Requested “American Meteorological Society”
Similar Journal: “Annals of the Association of American Geographers”

Differences in the Reference List:
Last author should be separated from year with a comma rather than a full stop.

When there are two or more publications referred from same authors for same year, year should have a single letter suffix (from a to z) based on the second author surname. (i.e. 2007a, 2007b, 2007c).
i.e.
Smith, E. and A.,Russell, 2007a: Molecular Cloning. Appl. Microbiol., 45, 120-130.
Smith, E., A., Simon, and A. Russell, 2007b: Xylose Fermentation. Appl. Microbiol., 48, 180-187.

Year should be separated from title with colon rather than full stop.

(if can be implemented) Reference list should be case in-sensitive to the bibliography entry. Title should be lower case and only the initial letter of the journal name should be upper case. This would be particularly useful, when libraries are shared and the initial bibliography entry was written case in-sensitive.

Journal names should be abbreviated rather than full name.

Volume numbers should be bold.

Volume number should be separated from page numbers with a comma rather than colon.

Total page number of the cited book should be given after the publisher with a comma in between. (Author(s), publication year: Book Title. Publisher, total pages.)


Differences in the Citations
If three or more citations are listed together, then they should be separated with a semicolon rather than a comma. i.e. (Smith et al, 2007; Russell et al., 2008; Pear et al., 2009).

When there are more than two authors, only the first author should be given, and the remaining should be referred as “et al.”

When there are two or more publications from the same author from same year, year should be followed by a single letter suffix showing the order of the citation i.e. (Smith et al., 2007a; Russell et al. 2007a,b)

If a specific page or page range needs to be cited, this should also follow the year, preceded by a comma.i.e. Smith (1996, 235–237). If a single page is cited, "p." should be inserted before the number. i.e., Smith (1996, p. 125).

thanks - I had not seen blackfox's post so thanks for bringing this up again.
To start with csl, see these three pages:
This
http://www.zotero.org/support/csl_simple_edits
and this
http://www.zotero.org/support/dev/creating_citation_styles
to get you started

This for an (almost) complete documentation
http://www.zotero.org/support/dev/csl_syntax_summary
let us know if you run into problems, happy to help

most of this is actually possible
- number of pages will be possible with the next release of Zotero, due out in the next couple of days, it will be text variable="number-of-pages" - you might even want to put it in already because the release is pending.
- letters are generally possible with
<option name="disambiguate-add-year-suffix" value="true"/>
in the citation section.
That gives you
Smith 2008a, Smith 2008b
if you also put
<option name="collapse" value="year"/>
you get
Smith 2008a, 2008b or
and with
<option name="collapse" value="year-suffix"/>
Smith 2008a, b.
- I think p. vs no p. should be doable by defining terms in the beginning http://www.zotero.org/support/dev/csl_syntax_summary#terms - those usually allow for multiple vs. single and you should just be able to define multiple as empty.
I can have a look if you can't figure that out.
- the last point isn't possible.

thanks - there is indeed no good guide to uploading style.

if you want I can upload it for you - put it on gist.github.com and post the address here
I could also check out the page issue for you.

If you want to do it yourself (and it is kind of fun...) you first need to get trac/SVN access:
https://www.zotero.org/dev/trac_access

Then you probably want an SVN frontend. On Windows people use Tortoise SVN, about which Rintze has posted here:
http://forums.zotero.org/discussion/3808/wrong-german-citation-in-chicago-and-harvard-style/?Focus=16585#Comment_16585

On Ubuntu Linux I use RabbitVCS, which works pretty much the same way and integrates nicely with Nautilus. I'm not sure what the Mac solution is, but I'm sure there is one.
On Mac and Linux SVN also works nicely of the command line if you're so inclined, you'll find plenty of tutorials online.

I committed the file. It's not showing up yet on the website, so I'm not sure if I did something wrong or if it just takes a little while.

Ok, looks like it's all set to go. The style can be found at:

http://www.zotero.org/styles/ametsoc/dev?install=1

And the Import/Export discussion is at:

http://forums.zotero.org/discussion/10671/new-american-meteorological-society-style/