Swipe left and right to move back and forth through time.
For a slower time speed, swipe up and down.
Click on the Clock icon to go to the current time.
Note: Double-click on the clock icon to go to the most recent Radar data update - because Radar Reflectivity is actual measured data, not forecast, it only appears in the past, and the most recent update will be up to 10 minutes in the past.