Originally Posted by
rickair7777
AWOS/ASOS pretty much looks straight up, and it can be 100% wrong if there is a single cloud parked over the sensor, or worse if there is a little hole in the deck right over the sensor.
Not to mention that a bird could land on it, nature calls, and suddenly your clear skies and 10 miles of vis drops drastically down to 100 overcast and 1/4 mi visibility.
