St. Louis, Missouri — While significant snowfall is not expected, light snow could still create slick travel conditions in the St. Louis area late Thursday and again Sunday, particularly along Interstate 70, I-64, and surrounding roadways.
According to the National Weather Service in St. Louis, the chance of measurable snow remains low, generally 10–20% late Thursday and 20–30% on Sunday. Forecasters emphasize that although accumulation chances are limited, cold pavement temperatures may allow any snow that does fall to stick quickly to roads, increasing the risk of slippery conditions.
Late Thursday’s potential snowfall would occur during overnight hours, when road temperatures are expected to be coldest. A second window for light snow exists on Sunday, with slightly higher probabilities but still below 30% across much of eastern Missouri and southwest Illinois.
Even minimal snowfall can create travel issues when temperatures remain below freezing. Bridges, overpasses, and elevated ramps along I-70, I-64, I-55, and I-270 are especially vulnerable to becoming slick with little warning. Drivers are urged to remain alert during overnight and early morning travel periods.
The National Weather Service notes that most locations are unlikely to see significant accumulation, but isolated slick spots could still lead to slower travel or minor delays. Road treatment effectiveness may be reduced if snow develops faster than expected.
Residents should continue to monitor forecast updates as timing and coverage details are refined. Small shifts in temperature or precipitation could influence whether snow remains flurries or briefly accumulates.
Commuters, students, and early-shift workers traveling late Thursday night or Sunday evening should allow extra time and reduce speeds if snow develops. Even light snow can create hazardous driving conditions when combined with cold road surfaces.
