Greenville, South Carolina – Drivers along Interstate 85 and Interstate 26 have less than three hours to navigate pockets of dense fog and scattered showers before visibility improves after 9 a.m. Friday. Patchy fog is cutting visibility below one mile in parts of the Upstate, slowing traffic during the early commute and increasing the risk of crashes on elevated roadways and bridges.
According to the National Weather Service in Greenville-Spartanburg, dense fog will linger through daybreak, especially across the Piedmont and areas along and south of I-85. Light showers are spreading across the western Carolinas, with the steadiest rain expected late morning into early afternoon. High temperatures will reach the upper 50s to near 60 degrees across much of the region.
Across South Carolina, cloud cover will dominate through the afternoon, keeping conditions damp from Anderson and Greenville to Spartanburg and Cherokee counties. Motorists traveling I-85, I-385 and I-26 should allow extra braking distance, use low-beam headlights in fog and reduce speed on overpasses where moisture can condense first. Emergency managers urge drivers to avoid sudden lane changes in low visibility and to check traffic apps before departing.
While rainfall totals are expected to remain light, brief downpours could create ponding on secondary roads south of the interstate corridor through 4 p.m. Friday. Drier and warmer air begins building in after sunset, setting up a calmer and brighter weekend across the Upstate.
Fog advisories remain in effect through 9 a.m. Friday, and additional updates are possible if visibility drops further before the morning commute ends.
