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Severe pulse storms SE Australia – Storms continue November 2009

Monday, November 2nd, 2009

Storms have been ongoing throughout Victoria over the past couple of days spreading into NSW. Some interesting pulse cells developed with some impressive anvil shields due to deep convection. Temperatures in the upper levels at anvil level have been rather cooler than I have seen it for many years. So the lapse rates in the upper portion of the atmosphere have allowed for some rapid development including the odd overshoot on pulse cells even. This has also enhanced the conditions for hail development once storms can tap into the upper atmosphere. Mid level temperatures have also been rather cool warming up yesterday as the ridge strengthened. We’ll see what happens over the next several days. At least moisture is no issue from now on. Sydney and the North Coast should be in the firing line over the coming days.

Jimmy

Rain and storms Sydney October 2009

Sunday, October 4th, 2009

Finally some significant rainfall across the Sydney region and south along the coast. Some heavy falls occurred in the parched South Coast where water restrictions are about to be issued.

The rain began overnight Friday as thunderstorms streamed in from the northwest. Some hailstorms amongst the many cells that developed and rapidly drifted towards the coast. Most of the more consistent rainfall however occurred on 3rd October. Models seem to indicate a wet pattern and relatively cooler weather at least for the first part of October.

Meanwhile, in contrast, bushfires and heat waves conditions persist in Queensland and parts of northern NSW.

Jimmy

Hot dry weekend September 12th and 13th 2009

Monday, September 14th, 2009

Since the last warm spell, the weather had remained reasonably cool with rather cool nights. However, the weekend proved to be rather warm to hot with a north westerly air stream advecting above average temperatures across the state. Temperatures reached 31C on Saturday 12th and 32C on Sunday. Amazingly, the minimum temperature during Sunday morning was about 7C warming to 28C by 11am! There have been and still are bush fires burning across the state.

Cooler weather this morning as the south east change moved through this morning. There is a potential for thunderstorms mostly elevated today. Tomorrow there is higher likelihood of thunderstorms as the change stalls.

Jimmy