Typhoon Champi’s northward movement is forecast to bring heavy rain, strong winds and rough seas to Jeju and southern South Korea on Saturday and Sunday. Heavy rain advisories have been issued for Jeju’s mountain areas and parts of Seogwipo, including its mid-mountain and southern districts. Wave advisories are also in effect across waters off Jeju and several sections of the southern offshore area.
- Affected period
- Saturday and Sunday
- Highest rainfall forecast
- More than 250 millimeters in Jeju mountain and mid-elevation areas
- Strongest gusts
- 70 to 90 kilometers per hour in Jeju
Jeju is expected to receive 80 to 150 millimeters of rain. Totals may exceed 200 millimeters in heavily affected southern and eastern locations, while mountain and mid-elevation areas could receive more than 250 millimeters. Busan, Ulsan and South Gyeongsang Province are forecast to receive 30 to 80 millimeters, with more than 100 millimeters possible along the southern coast. Forecast totals for Gwangju, South Jeolla Province and southern parts of Daegu and North Gyeongsang Province range from 20 to 60 millimeters.
Flooding and coastal hazards intensify
Rain could intensify to 20 to 30 millimeters per hour in Jeju. Rates of about 20 millimeters per hour are possible along the southern coasts of South Jeolla Province, Busan, Ulsan and South Gyeongsang Province. Such bursts could cause flooding in low-lying areas, sewer backups and sudden rises in streams, while saturated slopes may become vulnerable to landslides or falling rocks.
Jeju may also experience gusts of 70 to 90 kilometers per hour. Waves could rise above five meters, particularly in southern offshore waters, and existing wave advisories may be upgraded to warnings. Coastal visitors and fishing or shipping operators face added danger from high seas and swells reaching shore.
Residents should avoid riversides, unstable slopes and exposed coastal areas while monitoring updated forecasts, because the typhoon’s track and intensity may change. Authorities have urged preparation for flooding, isolation near waterways, landslides and swell-related accidents. Weekend festivals in Busan have also been postponed as the city prepares for the approaching storm.