FIRST ALERT: Increasing humidity and tropical moisture

Published: Jun. 17, 2021 at 4:15 AM EDT|Updated: Jun. 17, 2021 at 3:20 PM EDT
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MYRTLE BEACH, S.C. (WMBF) - Comfortable weather tonight will give way to increasing humidity and eventually tropical moisture by the end of the weekend.

Tonight will be clear and pleasant with overnight temperatures dropping into the upper 60s along the coast and middle 60s inland.

Sunny skies Friday.
Sunny skies Friday.(WMBF)

Friday will see another round of sunny skies and warm temperatures in the middle to upper 80s. Humidity will gradually start to increase through the late afternoon and evening.

The upcoming weekend will see a return to high humidity and eventually rain chances. Saturday will see afternoon temperatures hitting 90 in most areas with the heat index in the upper 90s to near 100. Sunday will see the humidity climb even higher as tropical moisture moves in. Showers and storms will become more likely late in the day.

Humidity returns
Humidity returns(WMBF)

The extent of rain and storms on Sunday will depend on the future of the potential tropical system developing in the Gulf of Mexico. A tropical depression or weak tropical storm is likely to form by late tonight or Friday and then move toward the central Gulf Coast States on Saturday.

By Sunday, the remnants of whatever develops will start to arrive in the Carolinas. While it’s not likely to be a strong system, enough tropical humidity and wind shear will be present for the chance of gusty winds, locally heavy rain and possibly severe storms to develop by late Sunday or early Monday.

Increasing rain.
Increasing rain.(WMBF)

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