It's that time of the year again. Mother Nature dazzles us all with her paintbrush and splash of brilliant color. As the days turn longer, less sunlight means less oxygen and glucose for plants and leaves and ultimately less chlorophyll, which hides the reds, yellows and oranges. The days of all green are over.
The timetable for leaf transformation runs from September through early November. Typically, the first to see breathtaking fall foliage are the Rockies, Upper Midwest and New England. Here shorter days are coupled with cooler temperatures.
From there leaves begin to change further south into the Ohio Valley, Pacific Northwest and Middle Atlantic toward mid and late October. The first frost and time of leaf change typically go hand in hand. Typically a within a week or so of the first frost, expect a huge uptick in leaf transformation. Other factors such as the amount of water over the summer and early fall impact the full potential of color. More water means better color.
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After a brief reprieve from the chill during the early week, southern Germany will be thrust back into a cooler, wetter weather pattern.
Arctic sea ice levels were at the lowest winter maximum on record this year, but that's only part of the story.
Air from the arctic will plunge southward across the United Kingdom into Thursday.
Summerlike warmth will surge northward into the Ohio Valley by Wednesday and the mid-Atlantic states on Thursday.
Those planning on celebrating King’s Day in the Netherlands on 27 April should prepare to face cool, wet conditions when they take to the streets.
While the extreme heat will briefly fade across northwestern India through midweek, dangerously high temperatures will remain elsewhere across the country.
From political to personal, every participant in the March for Science on the National Mall had a reason to be there.
Though America's fear over local Zika virus transmission has all but disappeared since last fall, health officials say the threat will return as temperatures rise in the coming months.