Forecast Exercise: Hail/No Hail Nomogram

Hypothetical sounding for hail question

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.
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