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Tropical Cyclone Information : Detail information

Tropical Depression a

Issued on 2025/09/17 01:00
2025年09月17日00時
熱帯低気圧 a
21日21時
20日21時
19日21時
18日21時
18日00時
17日12時
a

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■ 「01日12時」 means 12:00 on the 1st of the month.

■ Tropical cyclones do not necessarily move along the lines connecting the centers of probability circles.

■ Probability circles show expected tropical cyclone center locations with a probability of 70% for individual forecast times, but do not indicate changes in scale.

■ Even after transition from a typhoon to a tropical depression or an extratropical low, hazardous phenomena such as heavy rain, strong winds and high waves may be observed. Pay attention to updated meteorological information such as warnings and advisories for heavy rain, strong winds and high waves.

<Analysis at 00 JST, 2025/09/17>

Intensity/CategoryTropical Depression
Center Position15.8N 122.4E
Direction and speed of movementW 15km/h (8kt)
Central pressure1006hPa
Maximum wind speed near center15m/s (30kt)
Maximum wind gust speed23m/s (45kt)

<Forecast for 12 JST, 2025/09/17>

Intensity/CategoryTropical Depression
Center Position17.3N 121.9E
Direction and speed of movementNNW 15km/h (8kt)
Central pressure1004hPa
Maximum wind speed near center15m/s (30kt)
Maximum wind gust speed23m/s (45kt)
Radius of probability circle100km (55NM)

<Forecast for 00 JST, 2025/09/18>

Intensity/CategoryTropical Storm
Center Position18.8N 121.1E
Direction and speed of movementNNW 15km/h (8kt)
Central pressure1002hPa
Maximum wind speed near center18m/s (35kt)
Maximum wind gust speed25m/s (50kt)
Radius of probability circle130km (70NM)

<Forecast for 21 JST, 2025/09/18>

Intensity/CategoryTropical Storm
Center Position20.8N 118.3E
Direction and speed of movementNW 15km/h (9kt)
Central pressure1000hPa
Maximum wind speed near center18m/s (35kt)
Maximum wind gust speed25m/s (50kt)
Radius of probability circle200km (110NM)

<Forecast for 21 JST, 2025/09/19>

Intensity/CategoryTropical Storm
Center Position22.0N 115.7E
Direction and speed of movementWNW 15km/h (7kt)
Central pressure996hPa
Maximum wind speed near center20m/s (40kt)
Maximum wind gust speed30m/s (60kt)
Radius of probability circle260km (140NM)

<Forecast for 21 JST, 2025/09/20>

Intensity/CategoryTropical Storm
Center Position22.1N 113.8E
Direction and speed of movementW Slow
Central pressure992hPa
Maximum wind speed near center23m/s (45kt)
Maximum wind gust speed35m/s (65kt)
Radius of probability circle330km (180NM)

<Forecast for 21 JST, 2025/09/21>

Intensity/CategoryTropical Storm
Center Position21.8N 110.8E
Direction and speed of movementW 15km/h (7kt)
Central pressure996hPa
Maximum wind speed near center20m/s (40kt)
Maximum wind gust speed30m/s (60kt)
Radius of probability circle440km (240NM)
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