Casting Time: 1 action
Range: 120 feet
Components: V, S
Duration: Concentration, up to 1 hour
As per this fog cloud dnd 5e spell you can create a 20-foot-radius sphere of the fog centered on a particular point which is available within a range. The sphere also can spreads around the corners and also its area has heavily been obscured, it normally lasts for a specific duration or else until the wind of moderate or it makes greater speed (at least 10 miles per hour) disperses it.
Check about fly 5e spell
At Higher Levels: Any way whenever you cast this dnd 5e fog spell by using a spell slot of 2nd level or else higher and also the radius of the fog can increases by 20 feet for each of the slot level above 1st.
Spell Lists: Druid, Ranger, Sorcerer, Wizard