Free Will versus Determinism

This past February 13th I proposed myself to go to work and teach my Psychology class; and was quite happy getting ready to do so. Now, when I was about to leave my apartment, there was a snow storm outside that did not allow me to leave. I wanted to go teach my class, of course, but I couldn't, even though I wanted to. My will was restricted by external causes.

Another morning there was no storm to impede me from leaving my residence and the transportation was working fine. I was feeling okay but not as good as usual and thought about calling in sick. I could have decided not to go to work and exercise my free will, yet my sense of duty didn't allow me to. Was my will determined by my sense of duty this second time around?

Ivonne
(using a Psychology professor's example)