The Answer is Here: Article by Doctor Scripto and is referenced in many places for solutions to System log queries via Powershell.

get-winevent -ComputerName $CompName -FilterHashtable @{logname='system'; level=1; StartTime=(get-date).AddDays(-30) } | Format-Table -Auto -Wrap

The key is the -FilterHashtable parameter. It seems to be specifically designed to process this type of information. Furthermore, it delivers the error's Message, it runs exponentially faster!