Snowpack conditions in South Carolina are generally limited due to its mild climate, but the state does have a few mountain ranges that can provide snow. The Blue Ridge Mountains, including the highest peak in the state, Sassafras Mountain, receive the most snowfall. Other ranges, such as the Smoky Mountains and the Appalachian Mountains, also experience occasional snowfall.

The primary runoff rivers and watersheds in South Carolina include the Broad, Catawba, Keowee-Toxaway, and Savannah River basins. However, snowmelt from these mountain ranges contributes only a small portion of the overall water supply.

South Carolina's winter climate is typically mild, with average temperatures ranging from 40-60°F. Snow events are infrequent and generally light, often melting quickly due to the region's warm ground temperatures. However, occasional winter storms can bring heavier snowfall to the mountainous regions.

An interesting fact about snow in South Carolina is that the state holds the record for the heaviest snowfall in a 24-hour period. On March 13, 1993, during the "Storm of the Century," Mount Mitchell in the neighboring state of North Carolina received an incredible 50 inches of snow.

Overall, while snowpack conditions are limited in South Carolina, the state's mountain ranges do occasionally receive snowfall, contributing to the region's water supply and providing occasional winter beauty.