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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Full disclaimer

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Japan alert decoder · 気象防災速報（短時間大雪）

Weather disaster bulletin: heavy snow in a short time

Prepare and check your route · official rules as of 2026-10-17

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Prepare and check your route

気象防災速報（短時間大雪）

Weather disaster bulletin: heavy snow in a short time

Very heavy snow is falling in a short time; cars can get stuck even on main roads. Formerly 顕著な大雪に関する気象情報.

What to do now

  1. Avoid driving; if you are stuck, keep the exhaust pipe clear of snow.

Issued by: JMA (prefecture level). Live status: JMA warnings map (English)JMA earthquake information (English)JMA tsunami information (English)

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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first.

Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.

Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.