Forecast Exercise: Hail/No Hail Nomogram
Click on the Hail / No Hail Nomogram to determine whether hail is likely to occur later in the day.
That is incorrect.
Freezing level = 696 hPa
Cloud depth ratio = 0.44
Try again.
Hail is likely.
Plotting the freezing level / cloud depth ratio point (696 hPa, 0.44) on the nomogram,
the point falls into the category where hail is likely, consistent with our earlier findings about
hail potential.
Note that this diagram only applies to hailstorms over the Midwestern U.S., but could easily be
modified using cases from other regions. Also note the considerable scatter in the data used to
determine the hail / no hail line. One should not be quick to dismiss hail from your forecast
based entirely on use to this nomogram, particularly for cases that plot close to the line that
separates the hail and no hail fields.