The closet weather observation was recorded in Clinton, Arkansas, at 0355. The automated weather observation station recorded calm wind, 10 miles visibility, few clouds at 1,600 feet, ceiling broken at 4,900 feet, overcast at 6,000 feet, temperature 25 degrees Celsius, dew point 23 degrees Celsius, and an altimeter setting of 30.10 inches.
......and the conditions suitable for the creation of Fog are.....?
What was the elevation of the crash site?
Looking at the map....it looks to be about a 40nm flight...and the crash occurred just north of a river as the aircraft was approaching some higher ground. The reported weather was at the destination end of the route and off to the north of track.