Thursday: Southerly 20/25 knots, reaching up to 30 knots offshore south of Denham in the late evening. Seas: 1.5/2.5 metres. Swell: Southwesterly 2/2.5 metres. Friday: Southerly 15/25 knots decreasing to 10/15 knots in the late evening. Seas: 1.5/2.5 metres, decreasing to 1/1.5 metres during the morning. Swell: Southwesterly 2/2.5 metres. Outlook Saturday: East to southeasterly 10/15 knots tending southeast to southwesterly in the middle of the day then tending northeast to southeasterly in the evening. Seas: Around 1 metre. Swell: South to southwesterly 2/3 metres. Outlook Sunday: East to northeasterly 10/15 knots tending northwest to northeasterly during the morning then becoming variable about 10 knots during the day. Seas: Around 1 metre. Swell: Southwesterly 1/2 metres, decreasing to 1/1.5 metres during the afternoon or evening.Issued Thu 16:04 WST
18:56 EDT A series of spectacular electrical storms over Perth has blacked out more than 27,000 homes and businesses and caused flight delays.