News & Publications

Punxsutawney Phil predicted an early spring this year! Our maps of heat accumulation provide a more scientific look at how much heat has accumulated so far this year, and what's next. Heat accumulation is ahead of schedule in the Southeast, Northeast, and parts of the West, and more typical in Midwest states.

In places where spring has sprung, how how often have we seen a spring like this one? The USA-NPN's spring leaf out shines light on where leaf out of early season plants has occurred across the country. In the map, darker colors represent springs that are unusually early or late in the long-term record. Gray indicates an average spring.

Punxsutawney Phil predicts an early spring this year. Our map of accumulated growing degree days shows he may be right, for parts of the country anyway. See what Nature's Notebook observers are already reporting on plants and animals across the country.

In most of the last ten years, the First Leaf Index has arrived days to weeks earlier than calendar spring in the Washington, DC area. This year, spring leaf out arrived 25 days earlier than the Spring Equinox in Washington, DC.

Punxsutawney Phil predicts six more weeks of winter. We agree - if we're talking about the eastern US. The southeast especially has been cool so far this year.  In the west, we are already seeing signs of early spring from trout to snowberries. A new forecast by collaborator Toby Ault also calls for a early spring in the west, late in the east.