Forecast Exercise: Hail/No Hail Nomogram
To answer the next question, you may want to open one or both of the following:
Consider the morning sounding examined previously.
Determine the cloud depth ratio and the freezing level.
1. Freezing level:
hPa
The correct answer is 696 hPa.
2. Cloud depth ratio:
The correct answer is 0.44.
Cloud depth ratio = (CCL-T0) / (T0-EL)
CCL = 903 hPa (cloud base)
T0 = 696 hPa
EL = 235 hPa (cloud top)
Cloud depth ratio = (903-696)/(696-235) = 0.44
Remember or jot down the freezing level and cloud depth ratio before proceeding to the next page.