WDIO Storm Track Meteorologist Sabrina Ullman demonstrates how to make a DIY rain gauge with a plastic 2-liter bottle, a pair of scissors, a ruler, masking tape, and a permanent marker.

This will make sure that water doesn’t splash off of the ground and then fall into the rain gauge, skewing the measurements. Leveling You’ll also want to make sure that your gauge is level.

A long-time viewer emailed me earlier this week with a puzzle: he had two rain gauges side-by-side during our recent storm, but they measured a different amount of rain. Here's how it happens.