tulip poplar windfall and other spring flowers '23

NOAA headlines

• February 2023 was Earth’s 4th warmest on record
• Europe saw its second-warmest winter as global sea ice set a new record low

I found this year's first Tulip Popular flower windfall 16 days earlier than expected.  This early arrival was most likely driven by weather/climate.  My observation biases that might undermine the hypothesis:

• I'm better at spotting windfall flowers
• more time spent outdoors and less time commuting to work
  

Other nectar sources at this time (not shown):

• Chinese Wysteria (invasive)
  
• White Clover
• Spiderwort
• Amur Honeysuckle (invasive)
• Dandelion

1st Windfall	day of year
April 10, 2011	100
March 27, 2012	87
April 19, 2013	109
April 12, 2015	102
April 15, 2017	105
April 5, 2018	95
April 11, 2019	101
April 7, 2021	97
April 6, 2022	96
March 24, 2023	83
median	99