Manuals, Standards, Circulars and Bulletins
In this section, you will find Environment Canada's documentation pertaining to weather forecasting, observing standards, circulars and bulletins. This documentation is managed by Environment Canada for use by Environment Canada as well as for other Government of Canada Departments and partners.
Note: Clicking on the document cover image will bring you directly to the PDF version of the document. To view the document landing page and HTML versions, where available, click on the hyperlinked document title.
Manual of Word Abbreviations
Manual of Standards and Procedures for Observing and Reporting Ice Conditions
Manual of Standards and Procedures for Aviation Weather Forecasts
Manual of Surface Weather Observations
7th Edition, Amendment 19
Manual of Climatological Observations
Observer circulars provide instructions concerning new or revised observing procedures and/or new equipment and provide temporary interim instructions. Observer circulars supplement the current edition and amendment of the Manual of Surface Weather Observations - MANOBS - and are incorporated in subsequent editions or amendments.
There are currently no active circulars.
Aviation Weather Observing Bulletins (AVOBS) convey reminders, additional instructions, and clarification of observing procedures to weather observing stations.
AVOBS 4-2012 | PDF (accessible); 0.43 MB
Recording cloud traces at HWOS equipped sites
Effective December 2012
AVOBS 1-2014 | HTML
Recording Surface Weather Observation on Form 63-2322 for stations using the NAV CANADA Human Weather Observation System
Effective February 1, 2014
- Date Modified: