From the Point of View of Roman Catholic Church teaching, divination is not an appropriate response to natural phenomena. You would thus not get an official interpretation of such an event.
To answer your subordinate question: per the RCC, no, it is not a divine sign.
From the Catechism
Divination and magic
2116 All forms of divination are to be rejected: recourse to Satan or
demons, conjuring up the dead or other practices falsely supposed to
"unveil" the future.48 Consulting horoscopes, astrology, palm reading,
interpretation of omens and lots, the phenomena of clairvoyance, and
recourse to mediums all conceal a desire for power over time, history,
and, in the last analysis, other human beings, as well as a wish to
conciliate hidden powers. They contradict the honor, respect, and
loving fear that we owe to God alone.