Seasonal Climate Outlook

Bureau of Meteorology seasonal climate outlook

The Bureau of Meteorology's climate forecast system for monthly and seasonal climate outlooks is the Australian Community Climate Earth-System Simulator – Seasonal (ACCESS–S2). It is a dynamical (physics-based) forecast modelling system and is a collaboration between the Bureau of Meteorology and the UK Meteorological Office.

The Bureau of Meteorology’s seasonal outlook for May to July 2022 is indicating neutral (40-55%) chance of above median rainfall for the SWLD.  Predictive skill is moderate to good (55-100% consistent). The current longer-term outlook (at time of writing) for winter June to August 2022 is also mostly neutral, with lower chances (35-45%) for the northern grainbelt, with moderate to good skill (55-75%).

Temperature outlooks for May to July 2022, from the Bureau indicate a 45-80% chance of above average day-time maxima, with the higher chances along the coast. Skill is 75-100%. For night-time minima for the SWLD, the Bureau is indicating 55- 80% chance of exceeding above average temperatures, with the higher chances along the coast. Skill is poor mostly at 45-55%.

Rainfall outlook for May to July 2022 for Western Australia from the Bureau of Meteorology indicating 40-55% chance of above median rainfall for the SWLD.
Rainfall outlook for May to July 2022 for Western Australia from the Bureau of Meteorology indicating 40-55% chance of above median rainfall for the SWLD.
Percent Consistent skill of the Bureau of Meteorology’s outlook for May to July  indicating 65 to 100 percent consistent skill over the SWLD.
Percent Consistent skill of the Bureau of Meteorology’s outlook for May to July

 

Looking at other rainfall forecasting models, the majority of models are indicating neutral chance of exceeding median rainfall for the SWLD for May to July 2022.

Model distribution summary of 12 models outlook for May to July 2022 rainfall in the South West Land Division. The majority are indicating neutral chance of exceeding median rainfall for the next three months.
Model distribution summary of 12 models outlook for May to July 2022 rainfall in the South West Land Division.