SAVANNAH, Ga. – With a significant drop in temperatures expected this week and a potential for precipitation over the weekend, it’s important to understand why last year’s snowstorm led to the closure of bridges across the region.

Bridges are particularly vulnerable to freezing before roads do because they are exposed to cold air from both above and below. In contrast, roadways benefit from some warmth that emanates from the ground below them.

This phenomenon was evident at the Turner Creek Bridge during last year’s cold snap. Despite the air temperature hovering around 37°F and the road temperature at 36°F, the bridge itself was significantly colder, registering just 24°F. This stark difference occurs because bridges dissipate heat more rapidly due to their multi-sided exposure.

While dry conditions typically prevent this from becoming a problem, the forecast for Friday through Sunday includes a chance of precipitation. Whether it manifests as rain, a wintry mix, or snow remains to be seen, but any moisture could potentially freeze on bridges.

The situation is particularly concerning from late Saturday night into Sunday morning, as temperatures are predicted to plummet into the upper teens and lower 20s. This could create hazardous conditions, especially on bridges.

Because of this, there is a possibility that bridges could be closed again this weekend, similar to what we saw during last year’s snowstorm, so it’s something to keep a close eye on.