Due to the uninterrupted snowfall for the last three days, train services to and from Munich have been suspended today, cf. https://int.bahn.de/en/contact/special-event. Tickets booked for today remain valid until December 9.
Air travel is also affected:
"Due to the continuing heavy snowfall, there will be no air traffic probably until 6 a.m. tomorrow, December 3. Passengers are strongly advised not to travel to the airport today and to check the status of their flight with their airline before traveling to the airport tomorrow.", cf. https://www.munich-airport.com/
(And I'm trying to dig out my car now).