As of November 4, 2024, Western North Carolina, has experienced a dry spell following Hurricane Helene, which occurred 38 days ago. The region has received minimal rainfall since the hurricane, leading to decreased soil moisture levels. According to the U.S. Drought Monitor, approximately 67.3% of North Carolina is classified as Abnormally Dry (D0), with 3.1% experiencing Moderate Drought (D1) conditions.
In areas where soil moisture has significantly decreased, the immediate risk of landslides is reduced. However, dry soils can become hydrophobic, causing them to repel water. This condition can lead to rapid runoff during intense rainfall events, potentially triggering landslides even after a period of dryness.
Given the current dry conditions, a substantial rainfall event—such as 2 to 3 inches within a short period—could saturate the soil surface and increase the risk of landslides, especially on steep or previously compromised slopes. It’s essential to monitor weather forecasts and soil moisture levels closely. The National Weather Service provides soil temperature maps by depth, which can offer insights into current soil conditions.
For localized information, the North Carolina State Climate Office offers resources on soil moisture monitoring, which can be valuable for assessing current conditions in specific areas.
Currently the eastern and southern slopes of The Blue Ridge appear that they may receive 2-4 inches of rainfall over a 5-6 day period. Away from the slopes across the remainder of the foothills, generally speaking, 1-2 inches of rainfall currently appear possible.
In summary, while the current dry conditions have reduced immediate landslide risks, a sudden and intense rainfall event could still pose a threat due to potential rapid runoff and soil saturation. Staying informed through local weather updates and soil moisture reports is crucial for assessing landslide risks in the coming days.
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