Windy
windy.com
Weather models rendered as moving air you can read
The Live Planet
Where the aurora will be visible in thirty minutes
swpc.noaa.gov
Instant · Works anywhere
Free, no sign-up · online since 2011
The Space Weather Prediction Center models the auroral oval using live solar wind measurements taken by spacecraft sitting upstream of Earth. The map gives predicted brightness and the equatorward edge of visibility for both poles, refreshed every few minutes.
The forecast window is short enough to act on, so a green band creeping south over your latitude counts as an instruction to go and find a coat.
Keep going
Picked for a shared category and overlapping vibe, not for popularity.
windy.com
Weather models rendered as moving air you can read
earth.nullschool.net
The planet's wind, drawn as one continuous flowing sheet
flightradar24.com
Every aircraft in the air, updating as they move
marinetraffic.com
Live shipping, from container giants down to harbour tugs
minitokyo3d.com
Tokyo's entire rail network, running live in 3D
ventusky.com
Weather as painted colour fields, sliding through time