Residents across Sioux Falls and eastern South Dakota should prepare for hazardous travel conditions this morning, as a flash freeze event is expected following a rapid drop in temperatures, according to the National Weather Service in Sioux Falls.
As colder air surges into the region, temperatures are falling quickly through the morning hours, causing any wet or untreated surfaces to freeze. Roads, bridges, sidewalks, and parking lots that remain damp from recent precipitation are especially vulnerable to becoming icy in a short period of time. This rapid freezing can occur even if conditions appear dry at first glance, increasing the risk of unexpected slick spots.
Hourly temperature forecasts show readings dropping steadily into the teens and single digits, reinforcing the likelihood of icy conditions developing quickly after sunrise. While widespread snow is not expected, the combination of lingering moisture and falling temperatures creates a classic flash freeze scenario.
Minor to locally moderate travel impacts are possible, particularly during the morning commute. Drivers may encounter reduced traction, longer stopping distances, and an increased risk of slide-offs, especially on secondary roads, shaded areas, bridges, and overpasses that freeze faster than surrounding pavement.
The National Weather Service urges motorists to slow down, increase following distance, and allow extra time to reach their destinations. Pedestrians should also use caution when walking on sidewalks and steps, as ice may be difficult to see. Emergency preparedness officials recommend checking road conditions before traveling and adjusting plans if necessary.
This flash freeze serves as a reminder that winter hazards can develop rapidly, even without heavy snowfall. Conditions are expected to remain cold through the day, helping icy surfaces persist in areas that are not treated. Staying weather-aware and driving cautiously can help reduce the risk of accidents during this sudden winter weather transition.
