Complex sentence: For the next couple of days, Otto wandered over rather cool water, with sea temperatures of up to 23 degrees Centigrade, and was under a region of weak vertical shear between two upper-lows to its south and north.
Split into simpler sentences: For the next couple of days, Otto wandered over rather cool water, with sea temperatures of up to 23 degrees Centigrade. Otto was under a region of weak vertical shear between two upper-lows to its south and north.