Spring storms can bring new dumps of snow to alpine environments, and trampers need to be wary of avalanche danger.

In spring, milder temperatures and rain, rather than snow, can cause avalanches that are even bigger than those in winter, NZ Mountain Safety Council chief executive Mike Daisley said.

These avalanches can run further down a mountain to reach the valley floor. 

“Trampers heading through valleys, gullies or streambeds below snow-loaded slopes need to take avalanche safety seriously,” Daisley warned.

He said trampers can minimise their avalanche risk exposure by following a few simple guidelines:

1. Start early: The spring sun warms snow rapidly, increasing avalanche danger in the afternoon. Start early and aim to be well clear of steep, snowy terrain before the day warms up.

2. Delay your trip after a storm: After a storm the snowpack can become unstable and prone to wet snow avalanches. Wait 24–48 hours to allow snow to settle and any natural avalanches to occur.

3. Avoid travel below steep slopes: Even if you’re on the valley floor, there’s a real chance avalanches from steep terrain will reach you. Avoid stopping or pitching a tent in gullies, small sidestreams, under cliff bands or in clearings below steep, snowy slopes. 

4. Check the avalanche forecast: The NZ Avalanche Advisory provides forecasts for 13 backcountry alpine regions across the country and provides vital information for planning a safe trip. This includes the avalanche danger rating and any expected avalanche problems. 

5. If avalanche forecasting has ended for the season but there’s still snow around, seek information from the local DOC visitor centre.

6. Upskill your avalanche training and ensure you have the correct safety gear. Many courses are available through private guiding companies and alpine and tramping clubs. MSC has also launched a 23-part avalanche safety video series on YouTube.