Just What Do You Mean... Supercell?
Saraa Warminski | April 7, 2026
They’re big. They’re white. They’re fluffy. They’re loud. They’re heavy. They’re objectively cool. They’re called supercells. Severe storm season in the southern plains begins on March 1. This time of year is usually marked by rain, hail, tornadoes, destructive winds, and cool pictures, but let’s explore the science behind the storm.
There are two classifications for storms: thunderstorms and supercells. Both can bring damaging wind, rain, hail, and tornadoes. The difference in the storms is in the up- and downdrafts. A thunderstorm has up- and downdrafts in almost the same place. Thus, they work against each other and shorten the life of the storm. A supercell has a rotating updraft in the front of the storm and a downdraft in the back of the storm. This means that supercells can last for hours.
There are four conditions to form a supercell:
1. Wind Shear
Wind shear occurs when the wind is blowing at different speeds and in different directions at different altitudes. Wind shear can be seen with the naked eye by the movement of clouds. Directional shear causes a horizontal column of air to rotate. The speed shear lifts the column to a vertical position. This forms the updraft of a supercell known as the mesocyclone.
2. Humidity
Humidity or moisture is also necessary to form a storm. For water to precipitate from a cloud it has to be there originally. When there is less moisture in the air, a low precipitation (LP) supercell will form. These often bring high winds and large hail but little rain.
3. Lift
Lift occurs when denser air flows down which lifts the less dense air from the ground. The denser air is dry or cool, and the less dense air is the warm and wet air. The warm, wet air is pushed up into the cooler atmosphere where the water condenses and falls as rain.
4. Instability
Instability happens when a parcel of air is lifted from the ground and is warmer than the atmosphere around it. When the parcel of air cools with its surroundings, the atmosphere is stable.
Parts of a Supercell
The main part of a supercell is the mesocyclone or the updraft. This rotating column of air is found in the front of the storm, and it keeps the storm going. When the updraft is particularly strong, a portion of it will descend from the base of the cloud. This becomes the wall cloud. If the wall cloud begins to form a funnel shape, it becomes a funnel cloud. If the funnel cloud touches the ground, it becomes a tornado.
To the right of the mesocyclone is the downdraft. Below the downdraft is the rain shaft. This contains the rain and hail falling from the cloud. If the cloud is an ugly green hue, Look out! Troublte is on the way! The cloud contains hail.
From this downdraft also comes the outflow. This is the wind rushing down and out from the cloud. When the outflow blows through an area, the humidity will rise and the temperature will fall.
Above the storm is the anvil. This is the sign of a mature storm. If the anvil looks fluffy, the storm is still growing. If it looks wispy, the storm is dying. The anvil is formed when the storm reaches the cap or the layer of the atmosphere no longer conducive to a storm. Above the anvil is the overshooting top. This is a sign of a very strong storm. This is the part of the updraft that reaches above the cap.
Supercells are magnificent creations and studying them reveals the majesty of the Creator.
It's amazing out there.