<p>This study examines measurements of the atmospheric boundary layer response to rapid changes in surface forcing during the total solar eclipse of 8 April 2024 using coordinated surface mast, uncrewed aerial vehicle, and radiosonde observations near Bloomington, Indiana, USA. Obscuration at this site was 100% during a four-minute three-second duration of totality. Measurements capture the evolution of the surface energy budget and associated changes in wind, temperature, humidity, and turbulence from the surface to 4000 m above ground level. The rapid reduction in solar radiation led to a collapse of buoyant turbulence production, followed by the formation of a shallow stable layer shortly before totality that persisted for approximately 50 minutes after totality. The stable layer was maintained by surface heat loss through upwelling radiation and conduction into the soil. Its development strongly suppressed turbulence, producing reduced wind speeds and pronounced wind-direction rotation as near-surface flow decoupled from the air aloft, with turbulence decay observed in measurements made 2&#xa0;m and 25&#xa0;m from the surface. Suppressed vertical mixing reduced the transport of moisture and heat away from the surface, coinciding with the formation of a residual layer that persisted after the eclipse had ended. These observations provide a holistic view of stable layer formation, transient boundary layer collapse and potential recovery under extreme, short-duration radiative forcing.</p>