The advertised pattern is highly chaotic with energy riding over an amplifying western US ridge and interacting with additional energy associated with the TPV, then there is also energy undercutting the western ridge and taking the southern route. The op runs are (frequently) phasing energy dropping down from the NS with existing energy further south, while the ensemble runs largely have less interaction or suggest a much later phase. The difference in resolution probably plays a big part in the disparate projected outcomes, especially at this range. In simple terms, we just cant know yet.