Live radar RainViewer, ~1.2 km cells, refreshed every minute, last two hours replayable.

Baseline Open-Meteo ERA5, this area's 2020–2024 mean. Cells are ~28 km, so it is one rate for the whole window. The floor under radar gaps, which is most of the map.

Gain Multiplies radar and baseline together. Painted rain is not multiplied.

Brush Drag the map to paint 50 mm/h. Shift-drag erases.