I think some may be getting or sending the wrong message.
Surely the message is, even if you're the most experienced aviator in the world, if the taf says "prob 30 or 40", there's a very high chance that CBs may be encountered anywhere in the vicintity, not just at the airfield.
Anyone who has had the misfortune to experience it will know that a CB can manifest themselves and out - run most types of G/A aircraft, and will almost certaintly bite you if you are stupid or unfortunate enough to fly in the vicinity of, or, God forbid, inside one.
There endeth the lesson...
