Observer circular: En58-20E-PDF

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.

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Department/Agency Environment and Climate Change Canada.
Title Observer circular
Publication Type Series
Language [English]
Other Language Editions [French]
Format Electronic
Note Issued also in French under title: Circulaire d’observation.
Date [2017]-
Chronology Began with: OBS 2-2017 (April 27, 2017).
Frequency Twice a year
ISSN 2291-2886
Catalogue Number
  • En58-20E-PDF
Subject Terms Civil aviation, Weather forcasts

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