Tropical Storm No. 24 (Krovanh) is tracking slowly northward across open waters south of Japan, with no size or intensity sub-classification currently assigned. The storm is forecast to track north-northwestward past the Ryukyu Islands into the northern East China Sea before curving back east-southeastward into waters south of Kyushu by 7 September.
CURRENT STATUS
Based on the latest JMA observations on September 2, 2026 06:45 UTC
- Location: 23.1°N, 132.3°E — approximately 420 km southeast of Minamidaito Island, Philippine Sea
- Classification: Tropical Storm (no size or intensity designation)
- Movement: North at slow speed
- Central pressure: 996 hPa
- Maximum sustained winds: 35 kt (65 km/h)
- Maximum gusts: 50 kt (93 km/h / 25 m/s)
- ≥30-kt wind area: 330 km (180 NM)
Himawari Satellite Imagery (Visible Color) valid September 2, 2026 07:30 UTC
FORECAST TRACK SUMMARY
Typhoon No. 24 (Krovanh) is projected to maintain a north-northwestward track over the next 24 to 48 hours.
INTENSITY FORECAST
Tropical Storm No. 24 (Krovanh) is forecast to maintain sustained winds of 35 kt (65 km/h) with gusts to 50 kt (93 km/h) throughout the five-day forecast period, while central barometric pressure remains steady between 994 hPa and 996 hPa. Tropical Storm Korvanh will maintain moderate intensity, a stationary weather front is projected to stall along the southern coast of Honshu from 3 to 5 September. Deep tropical moisture drawn northward along the eastern flank of the slow-moving storm will continuously feed into this front, triggering severe atmospheric instability and prolonged, heavy-to-intense rainfall across western, eastern, and northern Japan.
IMPACTS & THREATS
Approaching the Nansei (Ryukyu) Islands before stalling south of mainland Japan, Tropical Storm No. 24 (Krovanh) is drawing a continuous stream of warm, tropical moisture northward into a stationary front along Honshu, presenting severe maritime, wind, and heavy rainfall hazards across wide areas of Japan through at least 5–7 September.
Strong Winds: Strong winds are forecast to affect the southwestern island chains as the storm nears. From 2 through 4 September, the Amami region faces maximum sustained winds of 35 kt (65 km/h) with gusts up to 50 kt (90 km/h). The Okinawa region is forecast to experience maximum sustained winds of 33 kt (61 km/h / 17 m/s) with gusts to 50 kt (90 km/h / 25 m/s).
Dangerous Waves: Seas will become rough to very rough across the Nansei Islands and southern waters of mainland Japan. From 2 through 4 September, wave heights of 5 metres with swells are forecast for the Okinawa region, while wave heights of 4 metres with swells are forecast for both the Amami region and southern Kyushu.
Heavy Rainfall: Heavy to intense rainfall is forecast across widespread areas from the southwestern islands to northern Japan. In the 24 hours from 09:00 UTC on 2 September (18:00 JST) to 09:00 UTC on 3 September, rainfall totals are forecast to reach 150 mm in Tokai; 120 mm in Hokuriku, Shikoku, southern Kyushu, and Amami; 100 mm in Tohoku, Kinki, northern Kyushu, and Okinawa; and 80 mm in Kanto-Koshin. In the following 24-hour period (to 09:00 UTC on 4 September), accumulations are forecast to reach 300 mm in Shikoku; 200 mm in northern Kyushu, southern Kyushu, and Amami; 150 mm in Tokai and Kinki; and 100 mm in Kanto-Koshin and Chugoku. From 09:00 UTC on 4 September to 09:00 UTC on 5 September, a further 200 mm is forecast across Kinki, Shikoku, and southern Kyushu; 150 mm in Tokai and Amami; 120 mm in Kanto-Koshin; and 100 mm in northern Kyushu. Cumulative totals may escalate further through 7 September as the storm's forward speed slows.
Landslides and Flooding: Strict vigilance is advised in the Tohoku region on 2 September for inundation of low-lying areas, river swelling, and flooding. Across the Nansei Islands, Western Japan, and through to Tohoku, strict vigilance for landslides, low-lying flooding, and rising rivers is urged from 3 to 7 September, as continuous rainfall falls over ground already saturated by preceding events.
OPERATIONAL PORT FORECAST
The most acute operational risks are concentrated across the Okinawa and Amami regions as the storm passes through between 2 and 4 September, with hazards subsequently expanding into the East China Sea and across southern coastal waters of Kyushu and Shikoku as the system decelerates and loops south of Japan through 7 September.
■NAHA, Okinawa Islands, Japan
■NAZE, Amami Islands, Japan
■ANBOU, YAKUSHIMA, Kagoshima, Japan
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Note on the storm's name: "Krovanh" is drawn from the Western North Pacific and South China Sea tropical cyclone name list, contributed by Cambodia, and refers to a cardamom tree (wild cardamom). The WMO and the ESCAP/WMO Typhoon Committee adopt these names sequentially to make tracking specific storms straightforward and to quickly communicate warnings. To learn more about how storms are named, please visit the World Meteorological Organization (WMO) website.
