PPT Slide
The “Garcia Method”: Forecasting Snowfall Using Mixing Ratios on an Isentropic Surface
- Determine the geographic location (area of concern) for the expected snowfall.
- Determine what isentropic surface best intersects the 700-750 mb layer over the area of concern.
- Analyze pressure every 50 mb and mixing ratios every 1 g kg-1.
- Determine the mixing ratio value over the area of concern and from the isentropic wind field approximate the mixing ratio to be advected into the are during the next 12 h. From these two values calculate an average mixing ratio for the 12 h period.