After the storm passes, the temperature may begin to rise again. In the air mass thunderstorm the precipitation falls into the updraft, cutting off the storm's moisture supply and eventually kills itself. The air mass thunderstorm only lasts about an hour which is not enough time to produce severe weather. In the Severe thunderstorm the updrafts and downdrafts are separate from one another, This allows the storm to last longer and severe weather may develop. To separate the updraft from the downdraft requires wind shear .
Winds speed increase with altitude case to updraft to tilt.
Because it tilts, when precipitation falls, it does not fall into the updraft, thus allowing a continuous source of moist warm air to fuel the storm. In addition to the winds increasing with altitude, the wind direction also changes. Enormous severe storms that develop and have a tilted updraft are called supercell thunderstorms . Below are some animations of the updraft and downdrafts in a supercell thunderstorm. Side-view animation of the updrafts and downdrafts of a severe thunderstorm.