The system was subsequently last noted during March 21 , as it dissipated over the Philippines .
The system entered the Philippine area of responsibility , where it was named Betty by PAGASA during March 17 as the system weakened into a tropical depression .
The system was subsequently last noted during March 21 , as system dissipated over the Philippines .
The system entered the Philippine area of responsibility , where it was named Betty by PAGASA during March 17 as the system weakened into a tropical depression .