On the page - Rain/Thunderstorms the units shown on the bottom axis are l/km2 and the units are in the range 0.025 to 20

This is incorrect, for that range the units would be l/m2

On the page - Rain/Accumulation the bottom axis range goes
mm 5 10 20 40 1m

This last is nonsense, it should be 100mm to correlate with the map colours