...these are even bigger than my very large outstretched hand. The clouds don't have well-defined edges, flat bases, or the look of cumulus clouds. This leaves stratocumulus--a large, lumpy cloud that forms at low altitudes and is often formed as layered stratus clouds (fog) rise as they move inland over low hills. These clouds come in a variety known as stratocumulus fractus, which are the smaller (factions) of the stratocumulus cloud as it breaks apart or evaporates.
Sure enough, when I checked the National Weather Service's forecast discussion, the morning cloud cover was described as "low clouds" and "stratus" and were predicted to rise, evaporate, and give way to mostly sunny skies.