08/20/2026
🌪 Whats the difference? We saw several cold air funnels yesterday with storms along a stationary boundry. The biggest difference is that cold air funnels do not form from a roatating thunderstorm while actual tornadoes/ tornadic funnel clouds do. Cold air funnels can occasionally reach the ground to become landspouts. Landspouts can cause minor damage. These funnels can form without a strong, rotating storm and are usually weaker. The stationary boundary was key yesterday, providing just enough convergence where rising air began to spin and condense into weak funnel clouds. As a quick reminder, a funnel cloud remains a funnel until the rotation has reached the ground.
However, the tornado warned storm near Muncie Indiana was different because it came from a supercell with a strong, rotating updraft. That organized rotation allowed the storm to produce a mesocyclone (rotating updraft) and maybe even a weak tornado which was not a landspout. This storm interacted with some stronger wind shear along a different boundry which allowed the storm to rotate, not just weak surface winds. This prompted a tornado warning by the National Weather Service.
The main takeaway is rotating thunderstorms vs non-rotating thunderstorms.