Yes it is, and don't forget the pilot was instrument rated and the airframe was fitted for IFR flight. So it tells me that when he lifted, sure the weather was crappy with a low ish cloud base and visibility at around 2 1/2 miles but he could have done the sortie IFR he needed to. Don't get me wrong, flying in crappy weather is difficult and many an accident has been caused by bad weather and disorientation, but it's fairly routine to fly and do a radar approach.