from http://www.orbitcast.com/

Reportedly one of the [XM] satellites (SAT1) is down, and all of
the repeaters are down due to a "software update." Some are saying
that they were told the system is expected to be up within 2 hours,
while others have heard that it will be fully restored in 2 days.

An XM Spokesman has provided this statement regarding the issue:

    "We are experiencing a temporary degraded performance issue,
which has affected some of our customers. We expect to return
to normal service levels this evening."

did anyone fly today and notice a loss in XM weather?