The latest storm news on July 5 said that Chantal is currently about 240 km southeast of Charleston, South Carolina.
The US National Hurricane Center (NHC) is closely monitoring the storm to assess its continued development potential.
Chantal formed on the morning of July 5 off the coast of South Carolina, prompting US officials to issue tropical storm warnings to some coastal areas of the state.
Due to the impact of Typhoon Chantal, thunderstorms are expected throughout the weekend.
According to the US National Hurricane Center, Chantal has maximum sustained winds of about 64 km/h and is moving very slowly north at a speed of about 3.2 km/h.
Forecasters say the storm will continue to strengthen before making landfall in the northern coast of South Carolina on the morning of July 6.
The biggest impact is certainly local heavy rain, especially along the coast and where the center of the storm is expected to make landfall, north of Folly Beach, most likely on the morning of July 6, before sunrise. The center of the storm is still quite wide and unclear," said 6.0 SEidel, weather expert from FOX Weather.
In addition, widespread heavy rains and the risk of flash floods are also forecast in coastal plains in North and South Carolina, lasting until July 7, with common rainfall from 50-100mm, up to 150mm in some places.
Chantal is also expected to bring high tides to some coastal areas of the two states. The highest water level may reach about 30-90cm in the tropical storm warning area and about 30-60cm in the storm's impact monitoring area.
High waves and dangerous offshore flows are also a serious threat to those present on the beaches in the path of Typhoon Chantal.
The Atlantic hurricane season runs from June 1 to November 30 every year. Chantal is the third storm of this year's Atlantic hurricane season, after Andrea and Barry.
