  In anticipation of the new era of high-redshift exploration marked by the
commissioning of the James Webb Space Telescope (JWST), we present two sets of
galaxy catalogues that are designed to aid the planning and interpretation of
observing programs. We provide a set of 40 wide-field lightcones with
footprints spanning approximately ~ 1,000 sq. arcmin, containing galaxies up to
z = 10, and a new set of 8 ultra-deep lightcones with 132 sq. arcmin
footprints, containing galaxies up to z ~ 12 down to the magnitudes expected to
be reached in the deepest JWST surveys. These mock lightcones are extracted
from dissipationless N-body simulations and populated with galaxies using the
well-established, computationally efficient Santa Cruz semi-analytic model for
galaxy formation. We provide a wide range of predicted physical properties, and
simulated photometry from NIRCam and many other instruments. We explore the
predicted counts and luminosity functions and angular two-point correlation
functions for galaxies in these simulated lightcones. We also explore the
predicted field-to-field variance using multiple lightcone realizations. We
find that these lightcones reproduce the available measurements of observed
clustering from 0.2 < z < 7.5 very well. We provide predictions for galaxy
clustering at high redshift that may be obtained from future JWST observations.
All of the lightcones presented here are made available through a web-based,
interactive data release portal
https://flathub.flatironinstitute.org/group/sam-forecasts.

Astrophysics of Galaxies