One in a trio of tropical storms set to become a 'monster'

Friday, July 3, 2015, 7:15 PM - A weakening tropical storm in the Pacific Ocean is expected to bounce back with a vengeance, bringing rain, thunder and strong winds to parts of Japan and South Korea next week.

Two other tropical events threaten island nations with torrential downpours, flash floods and landslides.

Here is a breakdown of the tropical storms swirling over the Pacific, and the potentially dangerous impacts they could have this weekend.

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Tropical Storm Chan-hom

A storm system swirling in the western Pacific could become a major 'monster' storm over the weekend -- threatening Fourth of July festivities in the American island territory of Guam.

After reaching typhoon status on Friday, Chan-hom weakened to a tropical storm later that same day.

However, rain and thunderstorms are expected to ramp up again as winds re-strengthen into Saturday. 

The National Weather Service has issued a typhoon watch for Guam, Rota, Tinian and Saipan, meaning typhoon conditions - winds of 120 kilometres per hour or more - are possible within 48 hours.

The storm is expected to pass south of Guam on Saturday with maximum sustained winds of 135 kilometres per hour. Chan-hon is forecast to dump about 300 millimetres of rain on the island nation over the weekend.

Violent winds and heavy rain have the potential to cause dangerous surfs and inland flooding.

By Sunday evening, Chan-hon could reach typhoon status once again as it passes near Saipan, also a U.S. commonwealth and part of the Mariana Islands.

The growing storm also poses as a threat to the Japanese islands, Taiwan, eastern China and South Korea by late next week.

Tropical Storm Linfa

While Tropical Storm Chan-hom will skirt by the Philippines with little fanfare, another west Pacific storm threatens the island nation with severe flooding.

Tropical Storm Linfa formed early Friday morning local time in the southern Philippine Sea.

Currently, the storm is on track to impact Luzon Island with heavy rain this weekend, prompting tropical storm warnings across northern areas.

Downpours will drench the island beginning Saturday, and are not expected to let up until Monday.

Flooding remains the biggest threat with expected rainfall totals between 75 -150 millimetres. Some communities could see localized amounts up to 300 mm.

Damaging winds up to 125 kilometres per hour will have the potential to bring down trees, power lines and cause extensive property damage.

Tropical Disturbance Raquel

On the other side of the equator, another system more disorganized than Chan-hom continues to weaken across the southwestern Pacific.

After reaching tropical cyclone status, Rachel was downgraded to a tropical disturbance on Friday.

However, forecasters warn that the dwindling system could still bring dangerous flash floods and landslides to the Solomon Islands this weekend. 

The Category One storm is expected to drop up to 100 millimetres of rain in a 24-hour period, accompanied by 100 kilometre per hour wind gusts.

A heavy rain warning is in place for the islands, located east of Papua New Guinea.

Raquel is expected to dissipate in the next few days.

Source: NOAA | The Weather Channel

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