There’s a good number of websites that show the development of typhoons and forecasts in one way or another, but US sites usually get their raw data from US sources, such as the NOAA and the JTWC (or RSMC).
The JMA (Japan) uses its own model, in addition, and i have the impression that the PAGASA (Philippines) uses its own as well. Not sure what model the CWB (Taiwan) uses. When it comes to forecasting a typhoon’s track, i can’t tell which of the models has a better track record, but have found the JTWC forecasts to be reliable enough to consider their site my first stop. The reason for their reliability is probably that they make use of several models and have experienced humans weight the output data and derive a forecast that way (when one of the models diverges significantly from the concensus, you will see comment to that effect in the discussion section). One interesting site shows the past track of a given typhoon, together with its strength - this is useful for short term forecasts and also to explain some strange weather patterns, because the track of the typhoon is plotted in shorter time intervals and more accurately (as it was observed), rather than smoothed out as other sites do: imocwx.com/typ.htm (there you need to click on the 動画 link to get an animation of the recent or current typhoon).
Supplementary data that we find useful comes from the JMA, such as this chart:
and from the regional coastguard detachment:
www6.kaiho.mlit.go.jp/11kanku/is … isyou.html (if you click on any of the orange arrows you’ll see 12-hour history charts of wind direction and speed)
The information from the coastguard is particularly useful in determining the path and the width of a typhoon’s eye, which we use at times to modify the fortifications that we apply to our house (it’s necessary to keep gates and doors closed and supported on the sides where the wind pushes in, but we keep those on the opposite side (lee side) open, so as to limit damage in case a barrier breaks down (a quick explanation: imagine you have a building with all doors and windows firmly closed and supported on the inside, but a door or window on the side facing the wind breaks down: the air will enter the building and increase the pressure inside abruptly, since it has nowwhere to go, and as a result one or more of the doors or windows pop out - we’ve seen that happen. Even the roof can be lifted up and taken off that way. If lee side doors and windows are open, however, a breakdown of a wind facing door will cause less structral damage at that moment. Long-term damage from not being able to re-establish a barrier at all where a door or window had been broken down is another problem, but we have fortunately not yet had to encounter that situation).