Japan Mete Service Forecast on Typhoon "Ma On"

The jangma (monsoon) in Korea continues. Four straight days of Forrest Gump type rain (remember the scene in Viet Nam, when it started to rain, and didn't stop for 6 months!). Following the Koran and Japanese forecasts for Typhoon Ma-On and there seems to be significant dispute in the track past 72 hours. Also, the Japanese use an intensity system goes from Very Strong to Very Intense. Not sure what comes after that other than Run for the Hills!

Scale Large
Intensity Strong
Center position N20°00'(20.0°)
E147°25'(147.4°)
Direction and speed of movement W 20km/h(10kt)
Central pressure 960hPa
Maximum wind speed near the center 40m/s(75kt)
Maximum wind gust speed 55m/s(105kt)
Area of 50kt winds or more Wide 170km(90NM)
Area of 30kt winds or more E650km(350NM)
W460km(250NM)


Intensity Very Strong
Center position of probability circle N20°55'(20.9°)
E142°50'(142.8°)
Direction and speed of movement W 20km/h(11kt)
Central pressure 935hPa
Maximum wind speed near the center 45m/s(85kt)
Maximum wind gust speed 60m/s(120kt)
Radius of probability circle 140km(75NM)
Storm warning area Wide 410km(220NM)


Intensity Very Strong
Center position of probability circle N21°50'(21.8°)
E137°40'(137.7°)
Direction and speed of movement W 20km/h(12kt)
Central pressure 915hPa
Maximum wind speed near the center 50m/s(100kt)
Maximum wind gust speed 70m/s(140kt)
Radius of probability circle 260km(140NM)
Storm warning area Wide 600km(325NM)


Intensity Very Intense
Center position of probability circle N23°00'(23.0°)
E133°30'(133.5°)
Direction and speed of movement WNW 20km/h(10kt)
Central pressure 910hPa
Maximum wind speed near the center 55m/s(105kt)
Maximum wind gust speed 75m/s(150kt)
Radius of probability circle 300km(160NM)
Storm warning area Wide