Prosper in a dynamic world
Search

Hydropower season has begun

Snow has fallen overnight in Australia’s alpine regions and continues to tumble down on Tuesday morning as a cold front sweeps across southeast Australia, kick starting the hydropower season.

As a heavy band of moisture crossed the alpine region just before 9 am Tuesday, this was the scene at Perisher in NSW, where the snow stake revealed accumulation of at least 5 cm of fluffy flakes.

Image: Locals report between 5 and 10 cm, most of which fell in quick heavy burst. Source: Perisher.

Intrepid Snowy Mountains local Steve Smith got out the winter boots and hiked up the slopes of Perisher on Tuesday morning, getting as far as the Mid-station restaurant, where the tables revealed about a beer can’s depth of accumulation.

Image: Snow was on the menu despite the Perisher Mid-Station restaurant being closed. Source: Steve Smith.

Snow also fell at the Victorian ski resorts, initially settling to about 1600 metres above sea level, as the distinct snowline on the image below shows.

Image: Snow on the Little Buller Spur ski run from the initial moisture band. Source: Mt Buller.

In the colder air behind the front, snow is now falling to lower levels, with snow being reported on the road up to Mt Baw Baw, where the village sits on about 1460m.

The image above shows the heavy moisture band crossing the Snowy Mountains of NSW just before 9 am. In Melbourne and surrounds, you can see the tell-tale speckled airmass associated with these sort of weather systems that bring the frequent heavy showers punctuated by brief sunny spells.

Melbourne is heading for a top of just 16°C today which would make it the coldest day of the year to date. The coldest air should reach Canberra before lunchtime while Sydney won’t feel the wintry blast until the early afternoon.

This system will bring a general drop in temperatures to southeastern Australia that will last most of the week. While occasional showers will persist for a few days in southern coastal Victoria, the moisture will clear out quite quickly in inland areas, with cold nights ahead.

As the low takes up residence over the southern Tasman Sea for the next couple of days, strong winds and big swells will lash the NSW coast with wave heights expected to reach 5-7 metres by Wednesday morning. A Severe Weather Warning for damaging winds for parts of the NSW coast has just been issued.

Hydropower
Using Opticast’s nowcasting and forecasting capabilities, you will have long-term outlook covering rainfall and extreme heat events out to 12 months. This can significantly improve your planning as you integrate the data with site-specific hydrological parameters.

With renewables making up more of Australia’s energy mix every year, we want to support your business to make informed critical decisions and improve your overall generation and safety. For more information, please contact us at apac.sales@dtn.com.

Latest news

Satisfy your weather obsession with these news headlines from around the nation, and the world.

How does DTN help businesses monitor bushfire induced pyrocumulonimbus thunderstorms that ignite more fires?

Intense heat from bushfires during elevated fire danger days can trigger fire-induced pyrocumulonimbus thunderstorms that ignite additional fires. In early January 2026, an extreme heatwave sweeping over southeastern Australia brought catastrophic fire danger to Victoria. Intensely hot bush and grass fires spread erratically and quickly in hot, dry and gusty winds, with pyrocumulonimbus generating lightning, […]

Active seas to the north and east of Australia disrupting port and maritime operations

Seas to the north and east of Australia are experiencing periods of increased activity this week, leading to disruptions to port, maritime and offshore operations. Intense and hazardous Tasman Sea Ocean conditions across NSW’s South Coast rapidly deteriorated last Friday as a deep feed of easterly winds whipped up large and dangerous seas. The Batemans […]

Transport, emergency and energy industries flooded across Greater Sydney with weekend deluges

Transport, emergency, energy and port industries in eastern NSW and Sydney were impacted by significant flash flooding with intense and heavy rainfall this weekend. Rainfall rates between 80 and 140mm in one to three hours were registered across parts of Sydney’s Northern Beaches and Central Coast on Saturday afternoon and evening. In some areas, these […]

DTN Dangerous Thunderstorm Alerts in action with severe thunderstorms disrupting Perth industries

Severe thunderstorms impacted southwest WA and the Perth region on Sunday, December 14, 2025, triggering Dangerous Thunderstorm Alerts (DTA) by DTN for industries and businesses in the region. DTN operates Dangerous Thunderstorm Alerts (DTA) which alert businesses and industries to thunderstorms based on intensity and movement. These alerts provide advanced notice of thunderstorms moving into […]