BoM expected to declare La Niña weather event as summer’s first tropical cyclone forms

Most of the models the Bureau of Meteorology uses tip cool and wet conditions will last until at least January 2022

• Follow our Australia news live blog for the latest updates
• Get our free news app; get our morning email briefing

Australia's Bureau of Meteorology is expected to declare on Tuesday that a La Nina event is under way in the Pacific, underscoring the prospect of a relatively cool, damp and stormy summer for much of the north and east.

The declaration will come a day after the bureau confirmed the season's first tropical cyclone had formed in the Australian region. Cyclone Paddy developed near Christmas Island and reached category-one stretch on Monday but will weaken within days without making landfall.

Sign up to receive an email with the top stories from Guardian Australia every morning