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"However, Cilla transitioned into an extratropical cyclone on January 30." - Extratropical transition redirects to extratropical cyclone. So why link to the same article twice?
"Damage in Tonga was mostly limited to vegetation and fruit trees; infrastructural damage remained relatively minor." - I don't think "remained" is such a good word choice here. Maybe you could say, "; infrastructural damage was also relatively minor."?
David Longshore's "Encyclopedia of Hurricanes, Typhoons, and Cyclones" is considered a questionable source and may not be reliable. Considering it is only used once in this article and for a broad statement (i.e. does not cite a number of deaths or houses damage/destroyed, etc.), it should be very easy to find a more reliable source. Perhaps you can find another source in
Cyclone Ami's article?