Especially in towering cumulus, ice accumulation can be sudden and severe.
In addition to finding it in and near towering cumulus, dangerous turbulence is especially prevalent in wintertime at those altitudes.
But now da-talink weather is green, yellow and red, with towering cumulus
clouds climbing high into the clear air around you.
Although there's clear blue sky with a few bands of altocumulus, the sky to the north looks like a sea of towering cumulus.
We're starting to see vigorous towering cumulus clouds rising off all the mountain ranges and forming prolific streamers of glaciated cloud, just like what was shown on the satellite image.
You should also avoid flight between multi-cellular convection, including towering cumulus
But if you've had an uneasy feeling for the past 50 miles because there are a lot more towering cumulus
than you expected or that tailwind you planned for has evaporated, look at your en route alternate.