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 Rain, rain - and more to come
The past few days have seen some serious rain fall in WA's South West and along the NSW coast.
On Saturday/Sunday 13/14 May, a low pressure trough along the NSW North Coast gave falls of over 25mm in the 24 hours to 09.00 Sunday between Kempsey and Evans Head with the highest falls between Coffs Harbour and Grafton where heavy showers moved onshore. Minnie Water on the coast 35km E of Grafton scored a surprisingly heavy 91mm in the 24 hours, with 63mm falling in a real downburst between midnight and 03.00. Wooli, just to the south, caught 56mm and most gauges around Coffs Harbour registed between 30 and 45mm.
A second trough with many embedded thunderstorms through inland NSW picked an area broadly from West Wyalong to Batlow to drop 10 to 40mm, giving 40mm at West Wyalong, 31 to Ungarie, 30 at Barmedman and a string of falls between 10 and 25mm as far south as Batlow in the same 24 hours.
Meanwhile, in Western Australia a low passed closed along the South Coast dragging a cold front and preceding trough giving most places in a triangle from Gosnells City to the far South West to Albany 10 to 25mm in the 24 hours to 09.00 Monday 15 May. In the coastal area and nearby ranges between Mandurah and Busselton-Bridgetown many places received between 25 and 50mm with Denbarker, 20km WSW of Mount Barker, top-scoring on 52mm. Perth's rain straddled the 24-hour reading cut-off at 09.00 Monday, but across the 48 hours to 09.00 today Perth Metro received 10.6 and Perth Airport 9.4mm, their best rain in a short period since 10 February.
Forecasts are indicating some significant rain will fall across a wide area of the country between now and late Friday. Heaviest rain, of 100 to over 200mm and possibly up to 400mm, is forecast for the QLD Central and North Coasts and nearby inland as a trough forms near the coast bringing rain and showers onshore. There is a flood watch out for the coast between Cairns and Gladstone, extending inland to parts of the Burdekin and Fitzroy catchments.
Coming from the west, a surface trough is bringing moist unstable conditions likely to give the Far South West of QLD 30 to 50mm with possible totals up to 100mm over the same timeframe. There is a flood watch out there, too. That same trough is forecast to bring 25 to 50mm of rain across much of western, central and southern NSW on Thursday and Friday pushing east to the coast from Friday giving a wet weekend for many coastal areas.
Over in WA, a front and a string of troughs are forecast to give 25 to over 50mm in the South West over the next week, with a 50/50 chance of the Perth area receiving 12mm from Friday to Sunday, but a 1 in 4 chance of 38mm or better.
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