As detailed forecast information than typhoon track forecast using JMA disaster information, the map visualizes the change of forecasts by fixing the base time. The color of markers on the track starts from yellow for analysis, and takes gray scale for the forecast lead time from black (shorter) to white (longer). A probability circle surrounding a marker indicates that the center will be observed within the circle with 70% probability. A bright red indicates the latest forecast. A right click of a marker does not show the infowindow, so you can see circles easier. You can also refer to History of Typhoon Forecasts (Fixed Forecast Time) instead of fixed base time. This track information should be treated as temporary data, and the final track information is available at best track data.