Tornado without Funnel near Rolla KS

Tornado without Funnel

Tornadoes can occur without funnel clouds, as shown in this example from Rolla KS in 1995. The dust cloud and cloud base above it were rotating, indicating a continuous cloud-to-ground vortex (tornado). The lack of a visible funnel can be related to several processes. Most likely, the pressure drop and lift in the tornado vortex was too weak to cool and condense a visible funnel; and/or the air below cloud base was too dry.