Missouri — Red taillights blur into the haze as fog settles low over interstates and river valleys before sunrise.
Early this morning, dense fog blankets much of the St. Louis metro, reducing visibility quickly in pockets. Temperatures hover near 55 degrees, with humidity near saturation. Calm winds allow fog to thicken, especially near I-70, I-64, and low-lying roads along the Mississippi River.
Drivers heading out for Christmas morning travel should slow down. Visibility may drop below a quarter mile at times. Use low-beam headlights and allow extra stopping distance. Conditions improve gradually late morning as fog lifts.
Once the fog clears, the day turns mild and quiet. Afternoon highs reach 65 degrees, unusually warm for December. Clouds linger, but travel conditions improve through the afternoon and evening.
Friday brings a brief break. Skies turn mostly sunny, and temperatures surge near 70 degrees, feeling more like early fall. Roads remain dry, offering the best window for post-holiday travel.
By Saturday, clouds return. Highs stay mild near 68 degrees, but moisture increases. A slight rain chance develops Saturday night, especially west of downtown. Pavement may turn slick after sunset.
Sunday becomes the most impactful travel day. Rain turns likely by afternoon, with steady showers reducing visibility and slowing traffic across eastern Missouri and southwest Illinois. Plan extra time if traveling Sunday afternoon or evening.
As colder air pushes in Sunday night, rain may briefly mix with snow before ending. Accumulation appears limited, but temperatures fall sharply. Wet roads could refreeze in spots before dawn.
Monday feels like winter again. Sunshine returns, but highs struggle near 29 degrees, with a biting breeze. Wind chills dip into the teens, ending the mild stretch abruptly.
For now, navigate fog carefully this morning. Enjoy the warmth while it lasts, and prepare for changing travel conditions late Sunday into early next week.
