Snowfall totals across the southern half of the state continued to increase in Monday forecasts to what could be record-breaking levels. Here's what to know for the New Orleans metro, the northshore,

Sub-freezing temperatures and a high chance of snow have officials in Louisiana treating the approaching winter weather as an emergency, one in which they anticipate road closures and other impacts from the frigid conditions.

Forecasters are also becoming increasingly confident that some kind of frozen precipitation— whether its snow, sleet or freezing rain — will impact South Louisiana.

Snowfall rates of 1 inch per hour, combined with wind gusts up to 35 mph, could create whiteout conditions at times. Travel will be nearly impossible Tuesday, especially on elevated roadways and bridges, where snow and ice are expected to accumulate quickly.

Meteorologist Devon Lucie starts with the dangerous cold tonight and Monday, then breaks down the snowstorm Tuesday walking you through what the different computer forecasts are showing for timing and precip types,