#Adelaide's running maximum of 42.6°C today is the city's highest temperature in four years. Further north, Oodnadatta just registered South Australia's first 48°C of this summer.

A ring of lightning is surrounding the eye of Severe Tropical Cyclone Zelia this morning. This is a sign that the system is intensifying rapidly. Zelia is expected to make landfall as a category 5 severe tropical cyclone on Friday. Details here: weatherzone.com.au/news/western-a…

Tropical Cyclone Zelia has barely moved over the past 12 hours. It's just been sitting ~140 km to the north of Port Hedland, gaining strength over a pool of very warm water where sea surface temperatures are hitting 30-31°C.

Severe Tropical Cyclone Zelia has just been upgraded to a category 5 system, with wind gusts estimated to be reaching 285 km/h near its core. Landfall still excepted to occur between Roebourne and Port Hedland late on Friday.

Severe Tropical Cyclone Zelia is crossing the coast to the east of Port Hedland, near the DeGrey River mouth. Zelia approached the coast as a powerful category 5 system, with sustained wind speeds of 205 km/h and peak gusts around 285 km/h near its core.

A huge algal bloom has appeared off WA's Pilbara coast. It was caused by Severe Tropical Cyclone Zelia brining cool and nutrient-rich water to the surface last week. Full story here: weatherzone.com.au/news/huge-alga…

Alfred has been looking like a subtropical cyclone today - a hybrid system featuring both tropical and extratropical cyclone characteristics. Despite this, forecast models suggest it will regain its tropical structure as it approaches Australia's east coast in the coming days.

Tropical Cyclone Alfred has now made the right-hand turn and is tracking towards Australia's east coast.

Tropical Cyclone Alfred will pass over this tongue of warm water in the East Australian Current (EAC) as it approaches QLD's southeast coast. This may help it gain strength prior to landfall, with current forecasts suggesting landfall as a high-end cat 2 system. 📷: IMOS

A rare précis forecast for Brisbane on Thursday! 📷: BoM

Maximum wave heights off Tweed Heads exceeded 15 metres earlier today. 📷: Queensland Government

These water vapour satellite images show a series of impressive atmospheric gravity waves being produced by huge thunderstorms over WA's Kimberley region last night.

📢 HEY AUSTRALIA: Aside from official advisories, where are you getting the most useful updates on Tropical Cyclone Alfred?

Landfall won't be the end of Tropical Cyclone Alfred's impacts, with severe weather likely to continue over eastern Australia on the weekend. Some models even predict heavy rain spreading south towards Sydney early next week. More details at: weatherzone.com.au/news/landfall-…

Tropical Cyclone Alfred's wobbly track towards eastern Australia over the last 72 hours.

Alfred's rain is coming through in bands (highlighted by the blue lines in this image). This means people in southeast Queensland and northeast NSW might see periods of drier weather in between periods of squally rain today.

Major flooding in the Diamantina River has transformed the landscape around Birdsville in southwest Qld. These satellite images use false colours to highlight the floodwater. The first image was captured on March 19, the second on April 8. 📷: Copernicus / Sentinel 2

The pinhole eye at the centre of Severe Tropical Cyclone Errol is a sign that the system is rapidly intensifying. Errol is on track to go from category 1 to category 4 in the space of just 24 hours.