OK, this week has been a bit crazy. I recorded phenology with Joe Rasmussen, the fellow who is working on his Vesta practicum, on Tuesday, September 20, but am posting the GDD today with the accumulation through Wednesday, September 21.
GDD base 50 accumulated since April 1 = 3528 (+265departure from normal) at Mountain Grove
http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system
http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf