Typhoon Champi Approaches Kyushu, Expected to Transition Into Extratropical Cyclone

Typhoon Champi, designated as Typhoon Number 30, is moving over the East China Sea and is expected to transition into an extratropical cyclone before making landfall near Kyushu. According to meteorological reports from Sunday evening, the storm was located in the East China Sea, moving north-northeast at approximately 20 kilometers per hour with a central pressure of 996 hPa.

Forecasters indicate that the system will transform into an extratropical cyclone while approaching the western and southern coasts of Kyushu. The transitioning storm is projected to bring heavy rainfall, fierce winds, and high waves to regions spanning from western to eastern Japan through Monday, raising concerns for potential weather-related hazards.

A stationary front moving southward across the northern Kyushu region is compounding the severe weather threat. Warm and humid air flowing into the front is creating highly unstable atmospheric conditions, leading to localized torrential downpours with hourly rainfall rates potentially reaching 30 to 50 millimeters, and locally up to 60 millimeters in areas like Nagasaki Prefecture.

Cumulative rainfall totals have already surpassed 300 millimeters in parts of Mie Prefecture and Tsushima due to a series of combined weather systems. Authorities warn that total precipitation could reach around 400 millimeters in the heaviest hit areas, increasing the risk of landslides, swollen rivers, and flooding in low-lying areas.

Strong winds and high waves are also expected to impact coastal zones. Forecasters predict maximum wind speeds reaching 18 to 20 meters per second, with peak instantaneous gusts up to 30 meters per second. Wave heights are forecasted to reach up to 6 meters near the western seas of Kyushu, accompanied by dangerous swells.

In addition, the combination of the approaching extratropical cyclone and high tide times could produce warning-level storm surges along coastal areas of northern Kyushu. Residents in affected regions are urged to stay alert for lightning, tornadoes, sudden gusts, and rising waters, and to ensure safety by moving indoors if cumulonimbus clouds approach.

Meanwhile, meteorologists are closely monitoring a separate developing system, Typhoon In-fa, currently moving slowly northward near the Marshall Islands. That storm is anticipated to intensify significantly early in the week, shifting its course westward and potentially bringing future impacts to the region.