Stunning footage has captured the moment Uluru became a waterfall after rain produced cascades down Australia's sacred rock.

The sides of the iconic rock were temporarily transformed into a stunning water feature as the typically harsh desert sun vanished behind a rain band, part of a cloud system stretching the entire length of Australia.

The Outback has already seen massive flooding this year with temporary inland seas isolating townships from the rest of the country.

Satellite images show the new cloud band stretching 3,600km from WA's Kimberley region, across central Australia and to the Queensland and NSW border.

The weather system has already dumped record-breaking rainfall over some WA and NT regions with more than 100mm falling in areas that usually see less than 20mm throughout May.