Unseasonably Warm Weather Sweeps Japan, Raising Avalanche and Flood Concerns
Japan is experiencing a significant warm spell heading into a three-day holiday period, with temperatures expected to soar 5 to 10 degrees Celsius above the yearly average. This unusual warmth, even as welcome to some, brings with it a heightened risk of avalanches and flooding, particularly in regions burdened with heavy snowfall.
The Current Weather Pattern
Currently, damp air is bringing cloud cover and rainfall to areas along the Pacific coasts of eastern and western Japan. However, this is a temporary condition. A powerful influx of warm air from the south, interacting with a low-pressure system near the Asian continent, is driving the dramatic temperature increase across the country.
Temperature Projections: A Glimpse of Early Spring
Forecasts predict daytime highs of 20°C in Kagoshima City and 17°C in Kochi City on Saturday. Further north, Nagoya City is expected to reach 16°C, Kanazawa City 15°C, central Tokyo 14°C, and even Sapporo City 8°C. These temperatures are remarkably high for this time of year, typically not seen until mid-March or early April.
Sunday promises even warmer conditions. Fukuoka City could see 22°C, Osaka City 20°C, Kanazawa City 18°C, central Tokyo 17°C, and Sendai City 14°C. These projected highs will be 5 to 10 degrees above average, mirroring temperatures usually experienced in late April.
The Risks: Melting Snow and Potential Disasters
The rapid warming poses significant risks. Accumulated snow in mountainous regions is likely to melt quickly, increasing the danger of avalanches. The melting snow contributes to the potential for flooding, rising rivers, and landslides. Authorities are also warning of the hazard of snow falling from roofs and accidents related to snow-removal efforts.
Pro Tip: If you live in a snowy region, clear snow from roofs carefully and be aware of potential avalanche zones when traveling in mountainous areas.
Recent Trends and Climate Context
The Japan Meteorological Agency (JMA) has noted record-high temperatures across Japan in the summer of 2025, alongside unusually dry conditions in July. This recent warm spell adds to a pattern of increasingly volatile weather events. While attributing single events to climate change requires careful analysis, the overall trend suggests a warming climate is contributing to more frequent and intense temperature fluctuations.
The JMA continues to monitor weather patterns and provide updates through resources like the Japan Meteorological Agency website.
FAQ
Q: What areas are most at risk?
A: Mountainous regions with heavy snow accumulation are at the highest risk of avalanches and flooding.
Q: What should I do if I notice snow accumulating on my roof?
A: Carefully remove the snow, taking precautions to avoid falls. Consider hiring a professional if the snow is too heavy or the roof is tricky to access.
Q: Where can I find the latest weather updates?
A: Check the Japan Meteorological Agency website for the most up-to-date information.
Did you know? The JMA has been providing meteorological services in Japan for 150 years, working to prevent disasters and build a more resilient future.
Stay informed about the changing weather conditions and prioritize safety during this unseasonably warm period. For more information on disaster preparedness, visit the Japan Meteorological Agency.
