Hello USA-NPN,
Are you seeing signs of spring in your area yet? If not, maybe you've seen the USA-NPN's spring maps in the news lately, such as in this beautiful visual from the Washington Post.
Our Return Interval map shows how often we see a spring like this year's. Darker colors in the map below represent springs that are unusually early or late in the long-term record. Gray indicates an average spring.
Parts of the Southeast, lower Midwest, mid-Atlantic, and New York City area are seeing either the earliest spring leaf on record or a spring that only occurs once every 40 years (dark green). Parts of the West are seeing a spring that only occurs this late once every 40 years (purple).
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