If you are VFR and the forecast indicates it is clearly not suitable, it is pretty simple to me - don't depart. It is not always that straight forward of course.
Weather forcasting/reporting in Australia is so bad that you would not fly much if you followed that rule!
Interestingly, in Alaska, FAA have set up webcams in numerous key locations - you can go online and take a look at the weather in realtime!
Dr 