Ice-Out
About the Ice-out Study
When the ice cover melts from lakes, rivers, ponds and oceans it's a welcome sign of spring. This event is known as "ice-out." Ice-out dates are one way to measure the greening of springl, and dates can be compared from year to year.
Watch for ice-out of your local waters
- Adopt a frozen body of water near you. You may choose a lake, pond, river, stream, bay, estuary--or even an ocean.
- Watch for the exact date that ice-out occurs. We define "ice-out" as the time the body of water is 90% free of ice.
Add
your ice-out sighting to the map
- Report ice-out from your site. Select "sightings" to report!
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