Saturday, December 5, 2015, Indianapolis, IN
The National Weather Service has extended the Freezing Fog Advisory until noon, but that may not be long enough.
Central Indiana is still socked in and temperatures are still below freezing.
The metro area has had visibility near zero for at least 8 hours. the picture below is from Speedway looking toward the Indy skyline. There are small changes showing up in North Central Indiana locations including Lafayette, Kokomo and Muncie. All were reporting visibility at less than 1 mile at 10:00 am.
The forecast model below shows the blanket of fog breaking up over South Central Counties this afternoon. Fewer daylight hours and a lower sun angle this time of year, make it difficult for the sun to burn through the fog. Even if the fog does burn off in areas, most of the region will stay gray under a higher ceiling of clouds throughout the day.
Stabilizing high pressure is another factor allowing the thick layer of fog to persist. It also creates a SouthEasterly airflow, which was expected to warm afternoon temperatures above average. We’ll be hard pressed to reach these expected highs unless the sun breaks through the clouds.
Overnight tonight, the fog will not be as thick or as widespread as weak wave approaching from the north creates a bit of a breeze helping to keep temperatures a few degrees warmer.
High pressure will keep weather dry and warmer for much of the week ahead. A parade of weak waves moving north of our region over the next several days will bring a chance of sprinkles at times.