This picture was taken from Poteau, Oklahoma from our recent saturated weather pattern. Of course we have all of the ingredients coming together, not only for the rain, but for foggy conditions as well. At 850 mb look at the dominant high over the SE. This high is responsible for pumping moisture off the Gulf of Mexico and straight into our area.

That southerly feed has provided us ample chances for rain during the afternoon; however, at night, the winds have been going calm, and the temperature has quickly cooled to the dewpoint under a partly cloudy sky. This has been the recipe for overnight fog development; moreover, the added rainfall only helps to saturate the layer of air right above the surface, so fog tends to quickly develop where the rain falls.