  We present a Fisher matrix forecast for the sensitivity on the mass of a
thermal warm dark matter (WDM) particle from current (DES-like) and future
(LSST-like) photometric galaxy surveys using the galaxy angular power spectrum.
We model the nonlinear clustering using a modified Halo Model proposed to
account for WDM effects. We estimate that from this observable alone a lower
bound of $m_{\text{wdm}}>647$\,eV ($m_{\text{wdm}}>126$\,eV) for the LSST (DES)
case could be obtained.
