Re: La ~ Nina and her effect on the Australian storm season / General weather

La Nina Impacts on New South Wales for November 2010

As suggested by the POAMA (Predictive Oceanic Atmospheric Model for Australia), the month of November around New South Wales was regarded as:-

- Cooler than normal especially during the daytime (With some variations).
- Wetter than normal especially across the inland of the state.

Generally conditions were a close match to that suggested by the POAMA models.

Maximum temperature anomaly

The following analysis is provided:-

- The south east of the state and areas near the Victorian state border experienced average daytime temperatures of 0C to 1C above average. Although this is close to the long term average for the month.
- Coastal areas and areas in a line from Batemans Bay to Coffs Harbour then south west to the Victoria State border experienced temperatures of 0C to 1C below average. Although this too could be regarded as being close to the long term average.
- Coastal areas in north east New South Wales through to central New South Wales towards south west New South Wales experienced daytime maximum temperatures of 1C to 2C below average for the month.
- Northern New South Wales experienced daytime maximum temperatures of 2C to 3C below average for the month.
- Northern border areas experienced average daytime temperatures of 3C to 4C below average for the month.

Minimum temperature anomaly

The following analysis is provided:-

- The South West slopes and Albury / Wodonga to Wagga Wagga then east to the foothills of the Great Dividing Range experienced minimum nightly temperatures of 2C to 3C above average.
- South east to southern New South Wales experienced minimum nightly temperatures of 1C to 2C above average for the month.
- Northern New South Wales stretching towards the south west of the state experienced minimum nightly temperatures of 0C to 1C above average.
- North west New South Wales experienced minimum nightly temperatures of 0C to 1C below average.
- An area around Tibooburra experienced minimum nightly temperatures of 1C to 2C below average.

Rainfall

Inland New South Wales experienced a wet month and above average rainfall was spread throughout the Murray Darling Basin. Interestingly, an area in south east and north east New South Wales experienced below average rainfall. An area across south east Queensland experienced falls of 25 to 100 mm below average for the month which stands in stark contrast to what happened across the remainder of eastern Australia.

When analysing the various plots for temperature and rainfall it is becoming evident that rainfall patterns stands in great contrast when compared to 2009. La Nina is impacting on eastern Australia and it is noted that the Murray Darling Basin is benefiting heavily from the event with many localities enjoying average yearly rainfall which is now well above average.

I have provided the relevant plots for temperature and rainfall anomalies for the whole of Australia so other states can be...

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