These computations for the horizontal length indegrees and altitude in degrees are used on the graph infigure 5-10, and for the forecast of hailstone diameter.EXAMPLE OF TECHNIQUE.— In the soundingshown in figure 5-9, the CCL is point A. The moistadiabat from the CCL to the pressure level, where thetemperature is -5°C, is the line AB´. The isobar fromthe point where the air temperature is –5°C to itsintersection with the moist adiabat is the line BB´. Thedry adiabat from the isobar BB´ through the triangle tothe pressure of the CCL is the line HH´. The base of thetriangle in degrees Celsius is 6°C (from plus 1 to minus5). The length of the dry adiabat through the triangle is21°C (from minus 4 to plus 17).EVALUATION.— The value on the graph in figure5-10, with a horizontal coordinate of 6 and a verticalcoordinate of 21, is a forecast of 1-inch hail.Figure 5-10.-Fawbush-Miller Hail Graph showing forecast hailstone diameter in inches.5-14