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Weather News - Perth's heaviest September rain in 26 years

Bob Neil, 22 September 2014

Heavy rain swept across parts of Western Australia during the past 24 hours, with Perth gaining its largest September total in 26 years. This has come after Perth's hottest September day on record, which was reached when the city hit 34 degrees on Saturday.

The heavy rainfall arrived with a strong cold front, which sourced high amounts of moisture from the anomalously warm seas surrounding southwest WA. Sea surface temperatures are currently above 20 degrees celsius in the southeastern Indian Ocean, which is above average for this time of year. These warm waters promoted higher atmospheric moisture levels, which contributed to the deluge during the past 24 hours.

Perth gained 36mm of rain in the 24 hours to 9am this morning, which was its heaviest daily total for September in 26 years. Most areas around Perth received 30-40mm of rain with the heaviest falling during Sunday afternoon. The wet weather has also cooled temperatures around the western capital, with the maximum only climbing to 22 degrees in the city on Sunday, down 12 degrees from maximum of 34 on Saturday.

The largest totals for the state were recorded in the Central West District, where Moascar (near Geraldton) received 59mm of rain in the 24 hours to 9am. This was its heaviest September total in at least 12 years.

For today, southerly winds are set to bring more showers to the region this morning. Although, these will be more isolated and are only expected to produce up to 5mm before clearing this afternoon.

Further ahead, a few sunny days are likely before the next chance for showers on Thursday.

- Weatherzone

© Weatherzone 2014

Weather News - Heavy rain and thunderstorms drenching inland QLD

Ben McBurney, 21 September 2014

The best rain in half a year is likely in parts of central and southern Queensland over the next two days as heavy rain and thunderstorms develop over the region.

A cold pool of upper air is interacting with a trough and humid easterlies sourced off the Coral Sea to generate heavy thunderstorms today and on Monday.

The state's southern inland will see the focus of activity today, before spreading to central parts tomorrow.

Widespread falls of 20-50mm are likely across the next 48 hours in districts including the Central West, Central Highlands and Coalfields, Maranoa and Warrego and northern parts of the Darling Downs and Granite Belt. Under heavier thunderstorms, falls of 50-100mm are possible with some very isolated pockets of up to 150mm not out of the question.

For many places this will be the best rain in at least a month, although others will see their heaviest falls since March.

Coastal locations will not miss out completely, with falls of 15-to-30mm possible in the Capricornia and Central Coast and Whitsundays districts, mainly on Monday.

From Tuesday, the trough will significantly weaken as a ridge of high pressure strengthens, although showers will linger on the coast.

There is the prospect of further rain on Thursday as another trough crosses the state, although falls are likely to be significant lighter.

- Weatherzone

© Weatherzone 2014

Weather News - Rain and thunder soaking central QLD

Ben McBurney, 22 September 2014

Rain and thunderstorms have barely let up over the past day over central QLD, drenching some places with their best rain in over a year with more on the way today.

A trough amplified by cold and unstable upper level air is combining with moist easterly winds, generating widespread rain and thunderstorms over central parts of the state.

Over the past 24 hours, more than 21000 cloud to ground lightning strikes sparked within a 500km radius of Blackall. Many of these occurred overnight which would have treated residents to a fantastic lightning show, on top of some healthy rain.

Springsure recorded an impressive 58mm in the 24 hours to 9am, the best rain the town has seen since February last year. Lochington collected 60mm, its heaviest rain in ten months while 39mm fell at Emerald, its biggest September fall in sixteen years.

More rain is on the way today as well, although falls will begin to become lighter as the trough begins to break down. Further widespread falls of 15-30mm are likely, with isolated falls of up to 50mm in some thunderstorms.

The rain is fantastic news for the region for which large parts are drought declared, although the falls are unlikely to be drought breakers. The state's west is particularly in need, with Longreach only seeing 128.6mm so far this year, well short of the average of 335.9mm typically seen by this time of the year.

While only light showers will linger on Tuesday and Wednesday, another trough brings the risk of further showers and thunderstorms on Thursday, mainly in the state's south with rainfall totals likely to be significantly lighter.

- Weatherzone

© Weatherzone 2014