For what it's worth, I'm based at SBA and had a trip into LA, by car, that morning driving through only about 40 minutes before the incident. As such I drove past KCMA, through Camarillo and up the hill to T/O and past Las Virgenes on the way into the Valley on the trip to Glendale.
The weather is being described by the media as "very bad" but it's not necessarily atypical for mornings coming from the Oxnard-Camarillo plain, where marine layer is common in summer but not that unusual year around. Oxnard was still foggy at 0845 that morning... and there'd been a bad crash, in similar conditions, on the Oxnard side of the river on the previous morning.
As is common, the fog cleared on the Camarillo side and KCMA was reporting "1.5 miles, with low ceiling" at that time of day.
What WAS unusual about the trip this time is that generally, when you have foggy conditions along the SBA-Ventura coast and the low-lying river mouth of the Ventura River area was this: USUALLY you drive OUT of the fog going up the hill. Generally it clears by the CHP Weigh Station at the top of Conejo Pass. This Sunday, however, it was different... coming over the top of the pass and down toward Wendy drive into Conejo Valley I got into pea soup fog, off-and-on, which didn't really clear until I was pretty much into the Valley at Topanga.
The net is that I simply don't see how this flight could have completed in VFR or SVFR operating rules, since there WERE MULTIPLE cloud/fog layers under a low overcast. He would have had to do more than Scud-running to get to a safe arrival at KCMA. I understand that he "did this trip all the time", but fog around the pass isn't that unusual-- it was just complicated Sunday by layers that he''d have had to transit for a safe arrival. Conejo pass up to 2500' was fogged in. Those conditions had persisted for hours, so I'm completely unclear as to how he'd have filed a flight plan to do this trip given the poor VFR conditions enroute. I'm mystified by this so perhaps the helicopter pilots here can fill in the details. Because it looks like he either would have had to scrub or transit some ugly IMC to get there. It's baffling.
Curt