Complex sentence: Warm sea surface temperatures were noticed in the English Channel and Norway The abnormally warm North Atlantic, which added moisture and energy weather systems as they crossed the UK September was the wettest since 1981, October the wettest since 1903 and November the wettest since 1970.
Split into simpler sentences: Warm sea surface temperatures were noticed in the English Channel and Norway. An abnormally warm North Atlantic, added moisture and energy weather systems as they crossed the UK September was the wettest since 1981, October the wettest since 1903 and November the wettest since 1970.