You create a 20-foot-radius sphere of fog centered on a point within range. The sphere spreads around corners, and its area is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 10 miles per hour) disperses it.
At higher levels
When you cast this spell using a spell slot of 2nd level or higher, the radius of the fog increases by 20 feet for each slot level above 1st.
The 2024 Player’s Handbook revised many spells, and the SRD 5.2 carries the new text. What changed from the 2014 version above:
Same level, casting time, range, components, duration and dice; the text is reworded for the 2024 rules glossary.
Casting time
Action
Range
120 feet
Components
V, S
Duration
Concentration, up to 1 hour
School
Conjuration
Level
1
Classes
Druid, Ranger, Sorcerer, Wizard
Tags
concentration
You create a 20-foot-radius Sphere of fog centered on a point within range. The Sphere is Heavily Obscured. It lasts for the duration or until a strong wind (such as one created by Gust of Wind) disperses it.
Using a Higher-Level Spell Slot. The fog's radius increases by 20 feet for each spell slot level above 1.
2024 version from the SRD 5.2. Most tables settle on one edition, so check which one yours uses.
