[chef] Grepping chef-client output

[Dylan Northrup < >]

Running chef-client 10.24.0 on some hosts I get a veritable deluge of WARN messages about things that aren't being done quite right and should be changed (many things, I'll add, that had not issued WARN messages in prior versions of chef-client).  I'd like to be able to grep out those WARN messages, but when I do it kills all chef-client output.  Trying to redirect STDERR doesn't make a difference.

Is there a best practice way of filtering chef-client output?

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Dylan Northrup