A significant weather event known as the "May Storm" is set to impact Japan from May 9 to May 10, 2025, bringing heavy rain and strong winds across various regions, particularly from Okinawa to Kanto. Meteorologists have issued warnings as a developed low-pressure system approaches, with expectations of severe weather conditions.
As of May 9, 2025, the storm has already begun to show its effects, particularly in Kyushu, where active thunderstorms have resulted in record-breaking rainfall. In Goto City, Nagasaki Prefecture, a staggering 62.0 mm of rain fell within just one hour, marking the highest recorded rainfall for May since statistics began in 1962. This extreme weather is not limited to rainfall; wind speeds are also reaching alarming levels, with maximum instantaneous gusts recorded at 28.0 m/s in Oita Prefecture and 25.9 m/s in Yamaguchi Prefecture, both setting new records for May.
Weather experts, including meteorologist Takeshi Ameda, have noted that the storm's intensity is exacerbated by a warm, humid airflow that feeds into the system, creating conditions ripe for heavy rainfall and thunderstorms. Ameda explained, "This warm and humid air acts as the raw material for rain clouds, leading to intense downpours that could occur in a very short period, potentially causing flooding in some areas." He advised those planning to be outdoors during the storm to wear long boots and waterproof clothing due to the expected conditions.
Warnings have been issued for a wide range of areas, with transportation disruptions anticipated, especially in northern Kyushu. The Japan Meteorological Agency has cautioned that the storm could bring warning-level heavy rain to southern Kyushu, Shikoku, Kinki, Tokai, and Kanto regions. Forecasts predict that by May 10, many areas could see up to 150 mm of rain, with Kanto expecting around 120 mm and Okinawa and northern Kyushu around 100 mm.
In addition to the heavy rain, there is a concern for yellow sand following the storm. This phenomenon occurs when dust from deserts in mainland China, such as the Taklamakan and Gobi deserts, is carried over to Japan. The yellow sand is expected to arrive from the morning to the night of May 10, with predictions extending to Kanto on May 11. The dust can affect visibility and cause respiratory issues, particularly for those with allergies. Residents are advised to take precautions by wearing masks and washing their cars with high-pressure water to remove any dust that may settle.
In the Sanin region, conditions have also worsened as the storm progresses. Rain has been reported across almost all areas, with maximum wind speeds reaching 20.4 m/s in Tottori City. The low-pressure system, which has developed near the Korean Peninsula, is the driving force behind this May Storm, and it is expected to move into the Sea of Japan, continuing to bring rain and strong winds.
As the storm moves, rain clouds are expected to cover the entire Sanin region, with the potential for thunderstorms later in the evening. The Japan Meteorological Agency has warned that if the low-pressure system intensifies further, a gale warning may be issued. However, there is a glimmer of hope as forecasts suggest that the weather may clear up by the morning of May 10, with some areas experiencing sunshine.
As residents brace for the impact of the May Storm, it is crucial to stay informed and prepared. The combination of heavy rainfall, strong winds, and the potential for yellow sand poses significant challenges. Emergency services are on alert, ready to respond to any incidents caused by the severe weather. Community members are encouraged to check local forecasts and adhere to safety recommendations to mitigate risks associated with the storm.
In summary, the upcoming May Storm is a stark reminder of the power of nature, bringing with it the potential for both beauty and destruction. As the storm approaches, the key for residents across affected regions will be to remain vigilant and prepared for whatever Mother Nature has in store.
