The three low pressure areas extend from the Mariana Islands to near Palawan Island (Philippines). Two of these are likely to develop into tropical depressions next week.
According to the latest storm information from the US Joint Typhoon Warning Center (JTWC), the Northwest Pacific is closely monitoring 3 unstable weather systems that are likely to develop into tropical depressions within the next 7 days.
Invest 95W near the northern Mariana Islands
On June 22, the Invest 95W low pressure located northeast of the northernmost Mariana Islands is creating convective clouds and scattered thunderstorms but has not yet clearly organized. However, environmental conditions in this area - including warm sea surface temperatures and weak wind shear - are favorable for development.
The system is expected to move north-northwest toward Japan. The possibility of a tropical depression forming early next week is assessed at an average rate (60%). However, from mid-week onwards, when entering the colder sea, the chance of development will decrease rapidly.
A disturbance near Kwajalein Island (Marshall Islands)
A weak low pressure area combined with a low-pressure trough operating near Kwajalein Island, accompanied by strong thunderstorms but had its tang cut off by strong winds above.
In the next few days, this system is forecast to move rapidly west-northwest through the eastern Pacific, unlikely to develop due to harsh upper-level winds.
However, by around June 25, the atmospheric environment could become more favorable as the disturbance changes direction to the north. A tropical depression is expected to form over the weekend, with a seven-day probability of an average of (40%).
Interference B near Palawan Island (Philippines)
A low pressure area has not appeared on the monitoring map but is forecast to form along the monsoon trough by the end of next week, in the area west of Luzon Island (Philippines), near Palawan.
According to forecast models, this system will move north-northwest, but the possibility of development is still very low, only at 10% in the next 7 days, due to not meeting the conditions for complete formation.
Although no system has officially become a tropical depression, these three disturbances reflect the increasing trend of tropical cyclone activity at the beginning of the storm season in the Northwest Pacific.
JTWC warned people in Japan, the Philippines and East Asia and the East Sea to closely monitor weather forecasts for next week, especially as Invest 95W could affect southern Japan if it continues to strengthen.
