1/100 (001) inch of rain – the first measurable amount of precipitation reported by The National Weather Service
This way, puddles would not remain on the ground and the surface would get slightly wet
This can happen during a light shower for 2-5 minutes or even a drizzle for 2 hours
1/10 (010) inch of rain – light rain for 30-45 minutes, light rain for 10 minutes, or heavy rain for 5 minutes
Small puddles would form, but they usually disappear after a short while
1/4 (025) inch of rain – light rain for 2-3 hours, light rain for 30-60 minutes, or heavy rain for 15 minutes
There would be many puddles on the ground and they would not disappear easily
1/2 (05) inch of rain – Light rain never reaches this amount, light rain for 1-2 hours, or heavy rain for 30-45 minutes
3/4 (075) inch of rain – Light light rain never reaches this amount, heavy rain lasts 2-4 hours
One (100) inch of rain – Light light rain never reaches this amount, heavy rain for several hours (2-5 hours)