December 18, 2018 7:16 pm NBC 6 Evening Weather Forecast: Dec. 18, 2018 NBC 6 chief meteorologist John Morales has the evening forecast for Tuesday, Dec. 18, 2018. US & World Videos 1:09 22 taken to hospitals after carbon monoxide leak in southwest Miami-Dade 0:49 3 lanes closed on Sawgrass Expressway; police investigate 1:56 Building evacuated due to hazmat situation in SW Miami-Dade 0:44 Three lanes blocked on Sawgrass Expressway in Broward County 0:32 Three lanes blocked on Sawgrass Expressway in Broward County