Perth weather: Southwest corner of WA could experience its coldest day this year

A wintry mix of hail, severe thunderstorms and even snow showers is forecast for Western Australia, as the southwestern corner of the state, including Perth, prepares for what could be its coldest day of the year so far.

A gusty cold front reached Perth just before midday on Monday and is expected to sweep across the rest of the South West Land Division, reaching Geraldton in Hopetoun this evening.

While this event is unlikely to be as strong or prolonged as the system that hit WA last week, bringing record gusts of wind to some locations, it is still expected to pack a punch.

Cape Leeuwin and Ocean Reef have already recorded gusts of wind near 90 kilometers per hour.

A large tree sits on the ground in a yard near a house.
Trees and power lines were downed by a storm that hit Perth last week.(Provided: Rowan Newton)

Hail could impact much of the state

Bureau of Meteorology senior forecaster Caroline Crow said the initial cold front will be followed by a pool of cold air on Tuesday, which will drop high temperatures and bring hail to much of the state. .

A hand holds a giant hailball
David Zander of Parmelia said he greeted them at their home last Tuesday morning.(Provided)

“Tomorrow there will be potential hail in the Southwest Overland Division from around Jurien Bay to Lake Grace to Esperance,” she said.

“Generally speaking, this is the coldest outbreak for the Southwest of the state that we are looking at for this season so far, given the region of hail potential which is quite far to the ‘inland.’

SES repairs roof of Mt Helena house
SES officers were busy with calls for help from Perth residents last Tuesday and Wednesday.(ABC News: Nic Perpitch)

She said maximum temperatures would generally be two to six degrees Celsius lower than average on Tuesday, with temperatures in the Deep South region struggling to reach teenagers.

“The Far South and Southern Coastal District is looking at temperatures around 10C to 12C,” she said.

“And from Bunbury in the interior parts of the South West Land Division, to the South East Coast District around this 12C mark.”

Perth is also expected to experience cooler than normal weather, with highs of 15C expected in the city and 14C in Mandurah.

The coldest day of the year so far in Perth was July 17, when the temperature peaked at 14.2C.

In Katanning, the coldest day was July 30 when the mercury only reached 11.1°C, Mount Barker’s coldest day was August 3 (11°C) and Bunbury’s coldest day was July 30 (13.9°C).

A branch piercing the roof of a house in Mt Helena.
The weather is not expected to get as wild as last week when a tree branch pierced the roof of this Mt Helena home.(ABC News: Nic Perpitch)

Bluff Knoll could have more snow

Ms Crow said the cold wind could mean snow on Bluff Knoll in the Stirling Ranges for the second time in a fortnight.


“It could be cold enough tomorrow to see some snow on Bluff Knoll, early morning around 4 a.m. 5 a.m. until noon,” she said.

“It’s more likely to be showers rather than really settling on Bluff Knoll.”

A weather app, Windy, even predicted the possibility of light snow in the hills of Perth early Tuesday. However, Ms Crow said that was unlikely.

“The darling escarpment doesn’t have a freezing level low enough or cold enough to get a snow cover like Bluff Knoll,” she said.

‘Off-season’ rain for northern parts of WA

It’s not just the downstate expecting a winter blast.

Ms Crow said a band of cloud was starting to thicken over western Pilbara and central WA which would likely bring showers mid-week.

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