A thunderstorm anvil which spreads upwind, against the flow aloft. A back-sheared anvil often implies a very strong updraft and a high severe weather potential when winds aloft are strong. eg see Supercell.
Tweet Vote on HN Some severe storms hit St Clair during the afternoon with hail, very heavy rain and some […]
Tweet Vote on HN Insane Supercell Structure Dumas, Texas May 18 2010 Impressive Supercell in the Texas Panhandle near Dumas […]