Taipei, July 25 (CNA)-The 12th tropical storm of the year formed near Guam early Wednesday morning, but is not expected to have a direct impact on Taiwan, according to Central Weather Bureau forecaster Cheng Chuan-fang (程川芳).

Tropical Storm Jongdari (雲雀) was upgraded from a tropical depression northwest of Guam into a tropical storm at 2 a.m. Wednesday, the Bureau said.

The storm is expected to move east of Japan with little chance of impacting Taiwan directly, though the bureau will closely monitor its movement, Cheng said.

Central and southern areas are likely to see earlier and longer thunderstorms, while those in northern and eastern Taiwan will mostly occur in mountainous areas.

In Taiwan, the forecast is for partly clear weather with chances of afternoon thunderstorms, said Cheng.

Central and southern areas are likely to see earlier and longer thunderstorms, while those in northern and eastern Taiwan will mostly occur in mountainous areas, he added.

The temperature in Taiwan is forecast to be 32-34 degrees Celsius, with the mercury rising to 35 degrees in some western areas.

The weather will remain humid when not raining, the CWB said, urging the public to remain vigilant and drink plenty of water.