A humid change is taking place in Sydney. Showers have started developing, marking a shift from a sunny, dry spell to more humid and unstable weather. This change will bring the most widespread storm activity the state has seen this season, with storms in the Blue Mountains already forming this afternoon.
A high pressure ridge provided plenty of sunshine on Sunday in Sydney, with a top of 21 degrees in the city and 23 in the west. Overnight this stubborn high was replaced by a low pressure trough, bringing widespread instability and causing cloud to blanket the city.
Sydney can expect isolated showers this afternoon, with some places seeing 5-10mm but others missing out all together. Suburbs in the west near the Blue Mountains may see up to 20mm of rain, as thunderstorms form along the ranges.
Showers should ease overnight, however tomorrow will tell a similar story to today as the trough lingers over the state. The western suburbs again have the best chance of seeing thundery action in the afternoon. Elsewhere in Sydney should be drier than today, with only a few isolated showers totaling 2-5mm in some places.
It will be generally dry on Wednesday as a weak high pressure ridge builds over the state. Another trough should then form on Thursday, ending the week with the chance of another burst of thundery showers on Friday. In total, parts of Sydney could see up to 30mm of rain this week. This is more than we've seen in the past three months and will quench the thirst of gardens and parks. The outlook is then brighter for the weekend, which should be mostly sunny.
© Weatherzone 2012
16:53 EST The first shipment of sugar to leave the Port of Bundaberg since floods devastated south-east Queensland in January is setting sail this afternoon.