Weather manuals and documentation
In this section, you will find Environment and Climate Change Canada's (ECCC) documentation pertaining to weather forecasting, observing standards, circulars and bulletins. This documentation is managed by ECCC for use by ECCC as well as for other Government of Canada departments and partners.
Manuals
MANOBS
Manual of Surface Weather Observation Standards
8th Edition, amendment 2
Effective: February 15, 2023
MANAB 4th Edition
Manual of Word Abbreviations
Valid on December 2, 2021
MANICE
Manual of Standards and Procedures for Observing and Reporting Ice Conditions
Revised Edition
MANAIR
Manual of Standards and Procedures for Aviation Weather Forecasts
8th Edition
Valid on December 2, 2021
MANCLIM
Manual of Climatological Observations
4th Edition
MANMAR
Manual of Marine Weather Observations
8th Edition
Circulars
MANAIR Circular (AIR)
MANAIR circulars supplement the current edition and amendment of the Manual of Standards and Procedures for Aviation Weather Forecasts (MANAIR) and are incorporated in subsequent editions or amendments.
AIR 1-2023
Instrument Flight Rules (IFR) approach and alternate limits for Canadian aerodromes with an Aerodrome Forecast (TAF) or an advisory program
Effective: April 20, 2023
Observer Circular (OBS)
Effective February 2019, coinciding with the publication of MANOBS 8th Edition, Observer Circulars are no longer issued by Environment and Climate Change Canada.
Bulletins
Effective February 2019, coinciding with the publication of MANOBS 8th Edition, Aviation Weather Observing Bulletins (AVOBS) are no longer issued by Environment and Climate Change Canada.
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