Valley fog in the southern Appalachian Mountains
1-km MODIS vs 4-km GOES-12 fog/stratus product
AWIPS images of the 1-km resolution MODIS fog/stratus product and the 4-km resolution GOES-12 fog/stratus product (above) demonstrate the advantage of higher spatial resolution for the detection of widespread small-scale fingers of valley fog that had formed during the overnight hours over much of the southern Appalachian Mountains states on 12 May 2009. This region had received heavy precipitation during the preceding week which led to major flooding — as a result the soil moisture was quite high, enhancing the potential for radiation fog formation.