The Helm Wind of 9 Nov 2010, simulated with the WRF-ARW weather forecasting model. Colours indicate wind speed (red is 30-40 mph). The 'water' represents the cold air spilling over the hillside (an isentropic or potential-temperature surface). Grid spacing 1 km. Visualisations done with NCAR's VAPOR software.
Ещё видео!