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Sample Forecast for Australia (West Coast)

Summary for Western Australia

Synopsis: A transition to ENSO-neutral is likely during late Southern Hemisphere fall or early winter 2016, with close to a 50 percent chance for La Niña conditions to develop by the fall.

Sea surface temperature (SST) anomalies decreased across most of the central and eastern equatorial Pacific Ocean during February. The latest Niño-3.4 and Niño-3 weekly values were near 2°C, while the Niño-4 and Niño-1+2 indices were 1°C and 1.4°C respectively. The subsurface temperature anomalies in the central and eastern Pacific decreased substantially in association with the eastward shift of below-average temperatures at depth. Low-level westerly wind anomalies and upper-level easterly wind anomalies continued, but were weaker relative to January. The traditional and equatorial Southern Oscillation Index (SOI) remained strongly negative. In addition, convection was much enhanced over the central and east-central tropical Pacific and suppressed over parts of Indonesia and northern Australia. Collectively, these anomalies reflect the continuation of a strong El Niño.

All models indicate that El Niño will weaken, with a transition to ENSO-neutral likely during the late autumn or early winter 2016. Thereafter, the chance of La Niña conditions increases into the spring. While there is both model and physical support for La Niña following a strong El Niño, considerable uncertainty remains. A transition to ENSO-neutral is likely during late Southern Hemisphere fall or early winter 2016, with close to a 50 percent chance for La Niña conditions to develop by the spring.

April Temperature

Most of the State should be from slightly warmer in the southwest to moderately warmer than normal in the central and norther areas. Only the coast near Carnarvon should be near normal to slightly cooler.

April Precipitation

Almost the entire state should be wetter than normal except for the very far north and around Albany in the far south that should be slightly drier than normal.