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9 clusters · 18 sources · 15 days · First seen · Last updated

Weather patterns and typhoon activity in Japan

Overview

Japan continues to experience significant temperature fluctuations and unseasonably warm autumn weather. While Tokyo recently set a record for the longest streak of summer-like days in October, the country has seen extreme variations between morning and afternoon temperatures. Weather conditions have deteriorated due to a low-pressure system and a stationary front. Heavy rain, thunderstorms, and strong winds are expected across several regions. The Hokuriku region, including Niigata, Toyama, Ishikawa, and Fukui, faces significant risks of flooding in low-lying areas and rising river levels, with 24-hour precipitation forecasts reaching 120mm in Ishikawa and 100mm in Toyama. In the Kinki and Tokai regions, residents are warned of sudden heavy thunderstorms, lightning, and the potential for tornadoes through the morning of October 20. On October 21, Toyama Prefecture experienced record-breaking late summer heat. Five locations recorded ‘manatsubi’ (summer-like temperatures) exceeding 30°C, driven by warm air flowing from the Pacific High toward a low-pressure system in the Sea of Japan. Toyama City (30.4°C) and Uozu City (30.2°C) set new records for the latest summer-like days in their histories, surpassing previous records from 1951 and 1994. Akigashima recorded 31.7°C, and Nanto City reached 30.3°C. The Toyama Local Meteorological Observatory warned that stagnant rain clouds could lead to heavy rainfall reaching warning levels. Extreme heat remains a critical concern. In Tokyo, the metropolitan government has released the ‘2026 Summer HTT’ newsletter to prepare for anticipated power supply shortages and temperatures exceeding 40°C. Regarding maritime activity, Typhoon 30, described as a ‘large and very strong storm,’ is moving near the Philippines. By October 22, significant seasonal shifts emerged as strong cold air brought the season’s first heavy snowfall to high-altitude areas in Hokkaido, including Mikuni Pass and Nissho Pass. First snow has also been officially observed in Wakkanai and Asahikawa.

Entities

Hokkaido · Okinawa · Toyama Prefecture · Isesaki · Osaka

Timeline

  1. [INTERNATIONAL] 5 sources
    Japan experiences first snow in Hokkaido and approaching Typhoon 30

    Hokkaido sees its first heavy snowfall at Mikuni and Nissho Passes, while Typhoon 30 approaches Okinawa, threatening heavy rain and wind across western and eastern Japan.

  2. [INTERNATIONAL] 2 sources
    Toyama Prefecture records record-breaking late summer heat

    Toyama Prefecture recorded its latest-ever summer-like temperatures on October 21, with cities like Toyama and Uozu exceeding 30 degrees Celsius due to unseasonably warm air.

  3. [INTERNATIONAL] 9 sources
    Japan records historic late-October heat in Tokyo and Osaka

    Tokyo and Osaka have hit record-breaking temperatures exceeding 30°C in late October, the latest such occurrence recorded in Tokyo since 1875.

  4. [INTERNATIONAL] 4 sources
    Toyama weather forecast warns of heavy rain and temperature swings

    Toyama Prefecture faces sudden heavy rain, strong gusts, and sharp temperature drops on the 21st, with concerns rising over the potential impact of Typhoon 30.

  5. [INTERNATIONAL] 5 sources
    Japan weather alert: Heavy rain and thunderstorms forecast

    Heavy rain, flooding risks, and thunderstorms are forecast across Japan's Hokuriku and Kinki regions, while Typhoon 30 approaches Okinawa, bringing potential rough seas later this week.

  6. [INTERNATIONAL] 3 sources
    Japan experiences significant temperature fluctuations

    Japan saw widespread seasonal low temperatures on October 18, followed by significant daytime warming and unseasonably high temperatures in Kyushu, creating large daily temperature fluctuations.

  7. [INTERNATIONAL] 3 sources
    Japan weather: Unseasonable warmth and Typhoon 30 monitoring

    Japan faces unseasonably warm autumn temperatures and significant daily temperature swings. While the weekend promises sunny weather, Typhoon 30 is being monitored for potential impacts next week.

  8. [CULTURE] 3 sources
    Japan weather: Clear skies for three-day weekend with regional thunderstorms

    Japan will enjoy widespread clear autumn weather during the three-day weekend, though thunderstorms are possible in Kyushu and Okinawa, and high waves may affect the Pacific coast.

  9. [INTERNATIONAL] 2 sources
    Japan weather: Clear skies return amid typhoon and temperature warnings

    Japan sees its first widespread clear weather in five months, though typhoons in the region may cause high waves and significant temperature swings between day and night.

Sources

applenet.jp · economica.net · fmhana.jp · fnn.jp · fukuishimbun.co.jp · hokkoku.co.jp · in.gr · joetsu.yukiguni.town · jugem.jp · kachimai.jp · kyoto-np.co.jp · news.cube-soft.jp · okinawatimes.co.jp · pelop.gr · real.gr · shonai-nippo.co.jp · topalbaniaradio.com · worldenergynews.gr

This summary has been updated 9 times: see revision history