WWA applies a unique scientific approach that combines observational data, analysis of a range of models, peer-reviewed research, and on-the-ground reports.

WWA uses the following criteria to decide which extreme weather events are candidates for a rapid, near real-time analysis by the partner organizations.

  • The event has major impacts on people

  • Enough usable data is available to understand what happened in terms of the meteorology in order to define the event, and there’s enough historical observations to put the event in context.

  • There is output of a model in principle capable of describing the event.

North American Winter (Dec. 2017-Jan. 2018)

Hurricane Harvey (August 2017)

Two Year Anniversary of UK’s Storm Desmond

Historical Responsibilities for Extreme Weather Events (November 2017)

Euro-Mediterranean Heat (Summer 2017)

Extreme Heat — Europe (2017)

U.S. Heat (Feb. 2017)

Australia Heat (Feb. 2017)

SE Europe Cold (Jan. 2017)

Somalia Drought (2016-2017)

North Pole (Nov – Dec, 2016)

U.S. Deep Freeze (Dec. 2016)

Kenya Drought (2016)

Louisiana Downpours (August 2016)

European Rainstorms (May 2016)

India Heat Wave (2016)

Great Barrier Reef (March 2016)

UK’s Storm Desmond (Dec. 2015)

Chennai Floods (December 2015)

Hottest Year on Record (Dec. 2015)

European Heat Wave (July 2015)

Ethiopia Drought (2015)

Western Drought (ongoing)

Southeast Brazil Drought (2014-2015)

Record European Heat (2014)