Simple Logging Customization

Is there a simple way to customize logging so that when you call the
logger method it includes the severity in the log? I just want to
make it easy to find with something like a GREP.

So a call to this:
logger.warn('my message')

Would put this in the log:
WARNING: My message


Just create a custom formatter and reference the log level there.
Something like the following, warning this has not been tested.

class Logger
  def format_message(severity, timestamp, progname, msg)
    "#{RAILS_DEFAULT_LOGGER.level} #{timestamp} (#{$$}) #{msg}\n"

Michael Guterl