I am noticing that at the moment KPLU is indicating a red weather symbol indicating IFR due to 2 miles visibility. KPLU is Class G airspace up to 700ft AGL, it is technically in Class iG Airspace and so VFR only requires 1 mile and clear of clouds. It appears that the Red (IFR), Blue (Marginal), and Green (VFR) dots are based soley on 3 miles and 1000 ft ceilings without regard for the actual airspace surrounding the airport. Do the weather dots come from Iflygps or Nexrad, or where?
It is the pilots responsibility to understand and .meet the required minimums, an not rely on technology. But I was just wondering
Chuck