Chaba now has winds to 180mph (155kt) and further strengthening - to 195mph (170kt) - is expected over the next two days. Not all too often you see a tropical system pushing that 200mph wind milestone, yet alone one doing it within radar range.

Edit: looking at the best track files on Chaba (in the JMV 3.0 data from the JTWC site), they list the estimated surface pressure at 879mb. Over the previous 6hr, that's a drop of 37mb and a wind speed increase of 30kt...very significant. It's very interesting to follow, though I hope everyone in the Marianas made it through safely.