 The following day, the JMA declared that it had developed into a tropical depression to the east of Mindanao, Philippines and was expected to slowly move west.The JTWC then issued a Tropical Cyclone Formation Alert (TCFA) for the embryonic system just hours later while convection began to gradually obscure the center.Later that day, the PAGASA followed suit and upgraded the system to a tropical depression, assigning it the name "Ambo", as it became the first tropical cyclone to enter their area of responsibility for 2020.