Dense Fog Advisory

An extended period of temperatures in the middle 30s during the week of January 21-27, 2024 in the State of Iowa produced areas of thick fog during the overnight hours. Both of the posted images look north from Bowman Woods Park in Cedar Rapids. Above is a capture from 7:55 pm CST, Friday, January 26 and is a 15 second exposure at f/6.3, ISO 100, 24mm focal length. Air temperature was 36 degrees F with 100% humidity.

1:57 am CST, Saturday, January 27. Similar Bowman Woods Park view. Lights in the background are from Bowman Woods Elementary School along Boyson Road. Air temperature was 34 degrees F. Image is a 15 second exposure at f/9, ISO 100, 43mm focal length. Nikon Z6ii camera.

National Weather Service (NWS) alert notification for a dense fog advisory, released at 3:27 am, Saturday, January 27. Advection fog like this occurs when warm moist air flows over a cold surface (snow).