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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.
|Department/Agency||Environment and Climate Change Canada.|
|Other Language Editions||[French]|
|Note||Issued also in French under title: Circulaire d’observation.|
|Chronology||Began with: OBS 2-2017 (April 27, 2017).|
|Frequency||Twice a year|
|Subject Terms||Civil aviation, Weather forcasts|
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