September 26, 2025

Tropical Storm Humberto and Invest 94L Threaten South Carolina Coast

South Carolina, September 26, 2025

News Summary

Residents in South Carolina are on alert as Tropical Storm Humberto and Invest 94L are expected to impact the coastline. Humberto is strengthening, potentially reaching Category 3 status. Invest 94L shows significant chances of development with potential effects as early as Monday. Both systems pose a risk of flash flooding and changing weather conditions.

Charleston, South Carolina – Tropical Storm Humberto and Disturbance 94L Raise Concerns for South Carolina Coastline Landfall

Two tropical systems are active near the Southeastern U.S. coast, raising alarms for residents and officials in South Carolina. The first, Tropical Storm Humberto, is currently positioned about 470 miles northeast of the northern Leeward Islands and is expected to strengthen into a hurricane by this weekend. Forecasts indicate that Humberto could potentially reach a Category 3 strength by Sunday, with wind gusts of up to 120 mph.

Humberto is moving slowly northwest at 6 mph and is predicted to track east of Bermuda early next week. The second system, identified as Invest 94L, is located over the Dominican Republic and has the potential to develop into a tropical depression near the Bahamas. The National Hurricane Center has reported a significant chance of development for Invest 94L, estimating it to have an 80% chance of development within two days and a 90% chance within a week.

Computer models suggest a direct path from Charleston towards Columbia and then on to Greenville/Spartanburg along Interstate 26 for Invest 94L. If it gains strength, it could be named Tropical Storm Imelda. The anticipated impacts from Invest 94L are expected to be felt in Upstate South Carolina between Monday and Tuesday, as weather conditions develop.

Forecasters have noted a marginal to slight risk of flash flooding for South Carolina due to persistent rainfall, even if Invest 94L does not evolve into a named storm. Exact timing and extent of any impacts from these systems remain uncertain; however, improved forecasts are expected in the next 24 to 48 hours.

Authorities are closely monitoring both Humberto and Invest 94L, with updates being regularly disseminated to keep residents informed on the situation. The simultaneous formation of two tropical systems in such proximity is a rare occurrence, adding to the urgency of the situation.

Key Facts Overview

Tropical Storm Humberto located 470 miles northeast of the northern Leeward Islands.
Humberto expected to strengthen to a Category 3 hurricane by Sunday.
Wind gusts could reach up to 120 mph.
Invest 94L has an 80% chance of development within two days and a 90% chance within a week.
Potential impact for South Carolina between Monday and Tuesday.
Marginal to slight risk of flash flooding due to rainfall.

Frequently Asked Questions

What is the current position of Tropical Storm Humberto?

Tropical Storm Humberto is currently positioned about 470 miles northeast of the northern Leeward Islands.

What is the expected strength of Tropical Storm Humberto by this weekend?

Humberto is expected to strengthen into a hurricane by this weekend, potentially reaching a Category 3 strength by Sunday with wind gusts up to 120 mph.

Where is Invest 94L located, and what is its development potential?

Invest 94L is located over the Dominican Republic and has an 80% chance of development within two days and a 90% chance within a week.

What impacts are anticipated for South Carolina from Invest 94L?

The potential impacts for Upstate South Carolina from Invest 94L are expected to be felt between Monday and Tuesday, with a marginal to slight risk of flash flooding due to persistent rainfall.

Are there any updates available on these tropical systems?

Monitoring will continue for both Humberto and Invest 94L, with updates provided by local news outlets.

Key Features Overview

Feature	Tropical Storm Humberto	Invest 94L
Current Location	470 miles northeast of the northern Leeward Islands	Over the Dominican Republic
Development Expectation	Expected to strengthen into a hurricane by this weekend	80% chance of development within two days and 90% within a week
Expected Strength	Potentially reach Category 3 strength	Could be named Tropical Storm Imelda if strengthened
Potential Impacts for SC	Not specified	Expected impacts to be felt Monday and Tuesday
Risk of Flooding	Not specified	Marginal to slight risk of flash flooding