"watched flight demonstrations by the adults to the east of the JSMB ... flying in the area of the Administration Building and flying/perching on the antenna atop the apartments just east of State Street (northeast corner of State and South Temple streets) and on the scrolls to the north of the nest box. Checked the weather forecast (KSL.com) and here comes the heat:
Fri. - 100, Sat. - 101, Sun. - 102, Mon. - 101 degrees! So, even though Solo is quite downy, my guess for first vault out is Thurs., or Fri."