The beginning of the nesting season always starts with “Raven time”.
Ravens are early nesters often having eggs by mid-February.
This season has been a mixed affair with some clutches abandoned due to the severe weather, possibly cutting off food supplies rather than affecting the nest itself, several pairs had a second go with some abandoning the second attempt for reasons that are not clear. At least two others succeeded in their second attempts.
A number of nests were right on time following the usual pattern, and obviously weathered the storms, which makes trying to attribute weather only to failures difficult. It is tempting to assume the successful nests had food sources unaffected by weather, but it is only supposition and we have no direct evidence for that. Two nests only managed to produce a single youngster.