Overview
- Japan’s Meteorological Agency said a linear rainband could form over the Izu Islands from Tuesday evening into late night, raising the potential for intense, localized downpours.
- Forecasts call for hourly rainfall up to 80 millimeters on Tuesday and as much as 200 millimeters through 6 a.m. Wednesday, with strict vigilance urged for landslides, low‑lying inundation, and river flooding.
- The Okinawa Meteorological Observatory issued heavy rain and flood warnings at midday for central and southern Okinawa Island, with hourly rates near 50 millimeters expected and warning‑level rain persisting through the evening.
- Forecasters note that rain cloud development could broaden warning areas beyond central and southern Okinawa, with very heavy rain still possible on Wednesday.
- Authorities also warn of lightning and tornado‑class gusts as the atmosphere remains highly unstable under the influence of a frontal zone and a tropical low.