Complex sentence: Before Maysak reentered the PAGASA's Area of responsibilty, the JMA reported that Maysak had weakened in to a tropical storm and then in to a tropical depression, however the JTWC were reporting that Maysak was still a tropical storm.
Split into simpler sentences: Before Maysak reentered the PAGASA's Area of responsibilty, the JMA reported that Maysak had weakened in to a tropical storm and then in to a tropical depression. However the JTWC were reporting that Maysak was still a tropical storm.