A cliche, but so what:

Today I have kept dry eyes through:

The news that my father is ill and in hospital and not doing well,

The fact that this came 8 weeks before a major international conference that I'm helping to organize,

The fact that I have a major report to write which is behind schedule and

Listening to my mother's tearful and panicked voice on the phone.

But:

The fact that it has just started raining outside, after I've spent an hour straightening my hair with every heat-styling tool known to humankind, has made me burst into loud, passionate and completely juvenile-sounding tears.