Near zero visibility in fog is expected.Dense fog is expected to develop once again over southeastern Manitoba tonight, including over the Red River Valley.The fog is expected to last until Sunday morning.###Visibility will likely be suddenly reduced at times.Fog advisories are issued when near-zero visibility in fog is expected.Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to MBstormec.gc.ca, call 1-800-239-0484 or post reports on X using #MBStorm.For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.