That escallated quickly: Typhoon #Hagibis goes from tropical storm to cat-5 typhoon with 890 millibar pressures and 300 kph (185 mph) winds, in 24 hours.
Presently moving through the Mariana Islands.
I'd spotted this via the Nullschool Earth Weather Visualiser (https://earth.nullschool.net), quickly confirmed via Force Thirteen, which runs a quite good tropical weather channel.
@bobgosane99 It's a real fave. All kinds of things turn up there. Firespotting (PM2.5 particulates and CO chemistry), power plants, volcanos, and shipping routes (SO2), temps, storms, pressures, space weather (!!!), and more.
Plus forecasts and history.