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Charleston, South Carolina — 7-Day Severe Weather Forecast
Updated
Today — Friday, October 9: No Severe Threat
Primary hazards: flooding
Cloudy skies are expected today with a high near 78 and a low around 69. While no strong storms are anticipated, gusty northeast winds may cause minor coastal flooding during high tides. Conditions could lead to some flooding, especially overnight.
Tomorrow — Saturday, October 10: Marginal Risk
Primary hazards: damaging winds, heavy rain, flooding, tornadoes, lightning
Heavy rain is expected to begin early Saturday and continue through the day, with around 1.9 inches of total rainfall and a high chance of showers and thunderstorms. This heavy rain could lead to flooding, especially during the high tide cycles when coastal flooding is also anticipated. Some storms could become strong, with the SPC indicating a 5% chance of damaging winds and a 2% chance of a tornado within 25 miles of the area. These storms are expected throughout the day. SPC Outlook: The Storm Prediction Center has issued a Marginal Risk for this area, and our model data supports it with favorable conditions for some organized storms.
Day 3 — Sunday, October 11: Marginal Risk
Primary hazards: heavy rain, lightning
Sunday will bring showers and thunderstorms to the Charleston area, with an 85% chance of rain during the day. While some storms could produce lightning and locally heavy downpours, widespread severe weather is not expected. The combination of strong humidity and tropical moisture from Hurricane Isaias may lead to significant rainfall, potentially exacerbating coastal flooding during high tide in the morning. Winds will shift offshore by Sunday night, bringing an end to the coastal flood threat. SPC Outlook: The Storm Prediction Center has issued a Marginal Risk for this area, and our model data shows conditions that support this level of threat.
Extended Outlook (Days 4–7)
Day 4 — Monday, October 12: No Severe Threat
The forecast for Monday suggests temperatures will reach the low 80s, cooling to the mid 60s overnight. Both forecasts indicate a dry day, with very little rain expected. With only a 13% chance of rain during the day, thunderstorms are unlikely, and any rain that does fall would be very light.
Day 5 — Tuesday, October 13: No Severe Threat
Tuesday will be warm, with temperatures climbing to 85 degrees and falling to 67 degrees overnight. It will feel muggy. Both forecasts agree the day will be dry with no rain expected.
Day 6 — Wednesday, October 14: No Severe Threat
Temperatures will be warm on Wednesday, reaching a high of 89 degrees, with a low around 68 degrees. It will feel quite humid, with conditions generally sunny throughout the day. Both forecasts indicate that the day will be essentially dry, with a very low chance of rain.
Day 7 — Thursday, October 15: No Severe Threat
High temperatures are expected to reach around 80 degrees Fahrenheit, with overnight lows settling near 72 degrees. It will feel muggy throughout the day. Both forecast models suggest a very low chance of rain, keeping the day essentially dry. Thunderstorms are not expected for Thursday.
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Written by AI from weather-model data and Storm Prediction Center outlooks. For information only: not a substitute for official National Weather Service watches and warnings. Full disclaimer