About halfway there, it rained harder, just to prove it could.
My windbreaker is sweet and tries hard, but it is not waterproof. It does just fine in light rain; pleasant spring-type showers are just its thing. It couldn't handle the deluge at all. So I arrived at the train station with soaking-wet shirtsleeves and a rather damp front (in spots).
As I was locking up my bike, it stopped raining.
(Note to self, or anyone who feels like taking me shopping: need raincoat, in some bright don't-run-over-me color. Also backpack protector. Maybe waterproof gloves?)