Yes it said "thunderstorm" on the weather forecast today, although I didn't hear any thunder. There was, however, heavy rain with strong winds - you'd be better off without an umbrella since it would be blown out of shape anyway. Thankfully I was already near Ikebukuro station so I only had to sprint a few steps before reaching shelter. It's stopped by now though.
I've been so lazy, but finally did a post on my pre-Tokyo travels - here's one on Kanazawa.
