Yeah hickory is a slow one. My fruit trees are leafing out as well as the maples, irches, aspen, and tulip tree. My chestnuts are trying to break bud and the hickories are just swelling.
I don’t even remember anyone taking consistent obs there when we were there. I remember doing some obs with the old stevenson screen in Ins and Obs, but everyone slacked with that.
https://wrcc.dri.edu/cgi-bin/cliMAIN.pl?nh1099
https://wrcc.dri.edu/coopmap/ — select nh in the menu
I assume you want lower numbers to help support your case?