MAKE A RAIN GAUGE
Put a jar outside in an open area before it starts raining.
After it stops raining, measure how many inches of rain are in the jar with your ruler.
*You can also use a jar to see how much water is in snow. Put an inch of snow in a jar, then bring it inside and let it melt. Heavy wet snow will have a lot more water in it than dry fluffy snow.
Youve just created your own rain gauge and can measure how much you received from the storm.