how do funnel clouds form?
<answer> Tropical funnels (and the similar cold air funnel) are not as well understood as funnel clouds that form in supercells and produce classic tornadoes. <context> Tropical funnels were spotted near several communites on the evening of the 28th. These funnel clouds were seen near Hereford, Clarendon, and Amarillo for brief periods. Tropical funnels (and the similar cold air funnel) are not as well understood as funnel clouds that form in supercells and produce classic tornadoes. Tropical funnels form in tropical environments, which Texas was experiencing due to moisture from Hurricane Miriam off the west coast of Mexico on the 28th. Meteorologists have an idea of how these tropical funnel clouds form, but the exact process (much like classic tornadoes) is not completely understood.