http://belgiannationals.blogspot.be/

Today we had set an 87 km task. Rather short because of the risk
for overdevelopment. And indeed, only 40 minutes after the first start gate at
13:30, the heavens opened right next to the first turnpoint we were about to
take. The 2nd turnpoint was already under the same big cloud and our last
turnpoint, Hongrie was already close to another thunderstorm. So, although the
flying was beautiful, it was impossible to complete the task in a safe way and
the task was stopped.

Jamie Shelden writes:

The first turnpoint was in rain and I only dared get within about
7km of it.