  We show that the usual linear analysis of QGP Weibel instabilities based on
the Maxwell-Boltzmann equation may be reproduced in a purely hydrodynamic
model. The latter is derived by the Entropy Production Variational Method from
a transport equation including collisions, and can describe highly
nonequilibrium flow. We find that, as expected, collisions slow down the growth
of Weibel instabilities. Finally, we discuss the strong momentum anisotropy
limit.
